Gateway Network and Remote Tag Provider on diffent Version

Hi everyone,
I am trying to connect two gateway via Gateway Network to access to tag through remote tag provider, but I obtain following errors.
In my configutation I have different minor version of Igntion. is it required same version?

This in Tag browser

java.lang.RuntimeException: com.inductiveautomation.ignition.client.gateway_interface.GatewayException: Error executing gateway function.
	at com.inductiveautomation.ignition.client.sqltags.impl.db.DatasourceTagManager.browse(DatasourceTagManager.java:548)
	at com.inductiveautomation.ignition.client.sqltags.impl.db.DatasourceTagManager.browse(DatasourceTagManager.java:528)
	at com.inductiveautomation.ignition.client.sqltags.impl.ClientTagManagerImpl.browse(ClientTagManagerImpl.java:332)
	at com.inductiveautomation.ignition.client.sqltags.tree.TagTreeNode.loadChildren(TagTreeNode.java:263)
	at com.inductiveautomation.ignition.client.sqltags.tree.TagTreeNode.loadChildren(TagTreeNode.java:322)
	at com.inductiveautomation.ignition.client.sqltags.tree.TagTreeNode.checkChildren(TagTreeNode.java:202)
	at com.inductiveautomation.ignition.client.sqltags.tree.AbstractTagPathTreeNode.getChildCount(AbstractTagPathTreeNode.java:284)
	at com.inductiveautomation.ignition.client.sqltags.tree.TagTreeNode.getChildCount(TagTreeNode.java:246)
	at javax.swing.tree.DefaultTreeModel.getChildCount(Unknown Source)
	at javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.expand(Unknown Source)
	at javax.swing.tree.VariableHeightLayoutCache$TreeStateNode.expand(Unknown Source)
	at javax.swing.tree.VariableHeightLayoutCache.ensurePathIsExpanded(Unknown Source)
	at javax.swing.tree.VariableHeightLayoutCache.setExpandedState(Unknown Source)
	at javax.swing.plaf.basic.BasicTreeUI.updateExpandedDescendants(Unknown Source)
	at javax.swing.plaf.basic.BasicTreeUI$Handler.treeExpanded(Unknown Source)
	at javax.swing.JTree.fireTreeExpanded(Unknown Source)
	at javax.swing.JTree.setExpandedState(Unknown Source)
	at javax.swing.JTree.expandPath(Unknown Source)
	at javax.swing.plaf.basic.BasicTreeUI.toggleExpandState(Unknown Source)
	at javax.swing.plaf.basic.BasicTreeUI.handleExpandControlClick(Unknown Source)
	at javax.swing.plaf.basic.BasicTreeUI.checkForClickInExpandControl(Unknown Source)
	at javax.swing.plaf.basic.BasicTreeUI$Handler.handleSelection(Unknown Source)
	at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressedDND(Unknown Source)
	at javax.swing.plaf.basic.BasicTreeUI$Handler.mousePressed(Unknown Source)
	at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)
	at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)
	at java.awt.AWTEventMulticaster.mousePressed(Unknown Source)
	at java.awt.Component.processMouseEvent(Unknown Source)
	at javax.swing.JComponent.processMouseEvent(Unknown Source)
	at java.awt.Component.processEvent(Unknown Source)
	at java.awt.Container.processEvent(Unknown Source)
	at java.awt.Component.dispatchEventImpl(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
	at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
	at java.awt.Container.dispatchEventImpl(Unknown Source)
	at java.awt.Window.dispatchEventImpl(Unknown Source)
	at java.awt.Component.dispatchEvent(Unknown Source)
	at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
	at java.awt.EventQueue.access$500(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.awt.EventQueue$3.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.awt.EventQueue$4.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
	at java.awt.EventQueue.dispatchEvent(Unknown Source)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
	at java.awt.EventDispatchThread.run(Unknown Source)
Caused by: com.inductiveautomation.ignition.client.gateway_interface.GatewayException: Error executing gateway function.
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.newGatewayException(GatewayInterface.java:329)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:303)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:260)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.invoke(GatewayInterface.java:886)
	at com.inductiveautomation.ignition.client.sqltags.impl.db.DatasourceTagManager.browse(DatasourceTagManager.java:546)
	... 57 more
Caused by: java.lang.reflect.UndeclaredThrowableException
	at com.sun.proxy.$Proxy16.browse(null)
	at com.inductiveautomation.ignition.gateway.sqltags.distributed.client.RemoteTagProvider.browse(RemoteTagProvider.java:383)
	at com.inductiveautomation.ignition.gateway.sqltags.SQLTagsManagerImpl.browse(SQLTagsManagerImpl.java:501)
	at com.inductiveautomation.ignition.gateway.project.ProjectSettingsCache$ProjectDefaultTagManagerFacade.browse(ProjectSettingsCache.java:576)
	at com.inductiveautomation.ignition.gateway.servlets.gateway.functions.SQLTags.browse(SQLTags.java:159)
	at sun.reflect.GeneratedMethodAccessor28.invoke(null)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.inductiveautomation.ignition.gateway.servlets.gateway.AbstractGatewayFunction.invoke(AbstractGatewayFunction.java:209)
	at com.inductiveautomation.ignition.gateway.servlets.Gateway.doPost(Gateway.java:390)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
	at com.inductiveautomation.ignition.gateway.bootstrap.MapServlet.service(MapServlet.java:85)
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:837)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:583)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1160)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1092)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
	at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:52)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
	at org.eclipse.jetty.server.Server.handle(Server.java:518)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:308)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:244)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
	at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:246)
	at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:156)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)
	at java.lang.Thread.run(Thread.java:745)

Ignition v7.9.1 (b2017012511)
Java: Oracle Corporation 1.8.0_171

And on gateway logs I have this:

com.inductiveautomation.metro.api.ex.RemoteException: Exception occurred on remote machine, error code=GENERAL_PROTOCOL_EXCEPTION [100]

at com.inductiveautomation.metro.impl.protocol.AbstractHttpConnection.handleRemoteError(AbstractHttpConnection.java:1172)

at com.inductiveautomation.metro.impl.protocol.AbstractHttpConnection.onDataReceived(AbstractHttpConnection.java:1026)

at com.inductiveautomation.metro.impl.protocol.longpoll.servlet.LongPollDataChannelServlet.doPost(LongPollDataChannelServlet.java:116)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)

at com.inductiveautomation.ignition.gateway.bootstrap.MapServlet.service(MapServlet.java:85)

at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:837)

at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:583)

at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)

at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)

at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)

at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1160)

at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)

at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)

at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1092)

at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)

at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:52)

at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)

at org.eclipse.jetty.server.Server.handle(Server.java:518)

at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:308)

at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:244)

at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)

at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)

at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)

at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:246)

at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:156)

at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)

at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)

at java.lang.Thread.run(Unknown Source)


SubscriptionManager	24Oct2018 09:51:57	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:234] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:51:46	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:233] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:51:35	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:232] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:51:24	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:231] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:51:13	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:230] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:51:02	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:229] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:50:51	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:228] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:50:40	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:227] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:50:29	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:226] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:50:18	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:225] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:50:07	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:224] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:49:56	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:223] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:49:45	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:222] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:49:34	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:221] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:49:23	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:220] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:49:12	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:219] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:49:01	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:218] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:48:50	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:217] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:48:39	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:216] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:48:28	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:215] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:48:17	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:214] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:48:06	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:213] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:47:55	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:212] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:47:44	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:211] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:47:33	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:210] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:47:22	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:209] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:47:11	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:208] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:47:00	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:207] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:46:49	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:206] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:46:38	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:205] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:46:27	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:204] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:46:16	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:203] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:46:05	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:202] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
Acknowledge	24Oct2018 09:45:56	The acknowledge command for [SAL10,[SAL10]SAL4/Serbatoi/S76/TankCTR/SB _ALL1,S76_SB_ALL] by 'cle' will not be processed, alert was not found, or was already acknowledged.
SubscriptionManager	24Oct2018 09:45:54	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:201] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:45:43	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:200] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:45:32	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:199] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:45:21	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:198] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:45:10	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:197] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:44:59	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:196] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:44:48	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:195] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:44:37	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:194] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:44:26	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:193] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:44:15	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:192] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:44:04	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:191] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:43:53	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:190] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:43:42	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:189] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:43:31	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:188] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:43:20	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:187] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:43:09	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:186] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:42:58	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:185] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:42:47	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:184] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:42:36	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:183] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:42:25	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:182] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:42:14	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:181] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:42:03	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:180] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:41:52	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:179] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:41:41	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:178] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:41:30	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:177] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:41:19	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:176] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:41:08	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:175] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:40:57	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:174] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:40:46	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:173] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:40:35	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:172] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:40:24	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:171] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:40:13	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:170] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:40:02	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:169] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:39:51	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:168] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:39:40	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:167] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:39:29	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:166] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:39:18	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:165] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:39:07	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:164] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:38:56	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:163] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:38:45	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:162] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:38:34	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:161] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:38:23	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:160] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:38:12	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:159] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:38:01	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:158] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:37:50	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:157] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:37:39	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:156] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:37:28	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:155] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.
SubscriptionManager	24Oct2018 09:37:17	[_0:0:ign-srv09_tagsubupd_ign-srv10_sal10:154] Error delivering subscription updates. The remote gateway may not be available, or the session may be expired. Turn this logger to debug for full error information.

I see one side is 7.9.1 - what’s the other side? The gateway network protocol changed a bit in the first few 7.9 versions - anything from 7.9…2, I believe, forward, should work across minor versions without issue.

Yes, I have 7.9.1 and 7.9.9, so I have to upgrade the oldest version