# \[IGN-14301\] isAlarmActiveFiltered Expression Error **URL:** \ **Category:** Ignition 8.3 Early Access\ **Created:** [September 15, 2025, 2:04pm UTC](https://forum.inductiveautomation.com/t/ign-14301-isalarmactivefiltered-expression-error/110629 "2025-09-15T14:04:50Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Zachary\_Ray](https://avatars.discourse-cdn.com/v4/letter/z/dec6dc/32.png) [@Zachary\_Ray](https://forum.inductiveautomation.com/u/Zachary_Ray)\ **Post date:** [September 15, 2025, 2:04pm UTC](https://forum.inductiveautomation.com/t/ign-14301-isalarmactivefiltered-expression-error/110629/1 "2025-09-15T14:04:50Z")
When using Ignition 8.3.0-beta4, I’m getting an expression error when using the isAlarmActiveFiltered expression. I’ve got a template I’ve developed in Ignition 8.1.48 which uses a UDT that is tied to an alarm AOI in a Rockwell PLC. We handle all of our alarms in the PLC rather than using an analog tag in Ignition with multiple alarms configured on it. So essentially the UDT is looking at 4 bits for the high-high, high, low, and low-low alarm. It’s got additional tags for the current value, setpoints, etc. My template displays the analog value and has an alarm indicator. I have 4 properties on my template for each alarm priority, binded to this expression + some variation for each priority: ```python // Check if there is a critical alarm active belonging to the // analog alarm UDT isAlarmActiveFiltered({UDT_Tank.UDT_Tagpath} + “*”, “*”, “*”, 4, 4, 0, 1, 0) ``` This expression works well in Ignition 8.1.48, but in Ignition 8.3.0-beta4, I get this error: ```python java.lang.Exception: Error executing expression binding on UDT_Tank.UDT_Tank.ALM_ActiveCritical at com.inductiveautomation.factorypmi.application.binding.ExpressionPropertyAdapter.runExpression(ExpressionPropertyAdapter.java:92) at com.inductiveautomation.factorypmi.application.binding.ExpressionPropertyAdapter.startup(ExpressionPropertyAdapter.java:113) at java.base/java.util.LinkedHashMap$LinkedValues.forEach(Unknown Source) at com.inductiveautomation.factorypmi.application.binding.DefaultInteractionController.startupBindings(DefaultInteractionController.java:379) at com.inductiveautomation.factorypmi.application.binding.DefaultInteractionController.startupAdapters(DefaultInteractionController.java:383) at com.inductiveautomation.factorypmi.application.components.template.VisionTemplate.startup(VisionTemplate.java:178) at com.inductiveautomation.factorypmi.designer.workspace.WindowWorkspace.openTemplate(WindowWorkspace.java:2449) at com.inductiveautomation.factorypmi.designer.workspace.WindowWorkspace.openTemplate(WindowWorkspace.java:2419) at com.inductiveautomation.factorypmi.designer.model.navtree.TemplateNode.open(TemplateNode.java:137) at com.inductiveautomation.ignition.designer.navtree.model.AbstractResourceNavTreeNode.onDoubleClick(AbstractResourceNavTreeNode.java:428) at java.desktop/java.awt.event.InvocationEvent.dispatch(Unknown Source) at java.desktop/java.awt.EventQueue.dispatchEventImpl(Unknown Source) at java.desktop/java.awt.EventQueue$4.run(Unknown Source) at java.desktop/java.awt.EventQueue$4.run(Unknown Source) at java.base/java.security.AccessController.doPrivileged(Unknown Source) at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source) at java.desktop/java.awt.EventQueue.dispatchEvent(Unknown Source) at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source) at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source) at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source) at java.desktop/java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.desktop/java.awt.EventDispatchThread.pumpEvents(Unknown Source) at java.desktop/java.awt.EventDispatchThread.run(Unknown Source) Caused by: com.inductiveautomation.ignition.common.expressions.ExpressionException: Error retrieving alarm state from gateway. at com.inductiveautomation.ignition.client.expressions.ClientFunctionFactory$IsAlarmActiveFilteredFunctionClient.execute(ClientFunctionFactory.java:231) at com.inductiveautomation.ignition.client.expressions.ClientDynamicDispatchFunction.execute(ClientDynamicDispatchFunction.java:43) at com.inductiveautomation.ignition.client.expressions.ClientDynamicDispatchFunction.execute(ClientDynamicDispatchFunction.java:43) at com.inductiveautomation.ignition.common.expressions.FunctionExpression.execute(FunctionExpression.java:69) at com.inductiveautomation.factorypmi.application.binding.ExpressionPropertyAdapter.runExpression(ExpressionPropertyAdapter.java:83) ... 22 more Caused by: java.lang.ClassCastException: class com.inductiveautomation.ignition.common.rpc.impl.AlarmingRpc$IsAlarmActiveFilteredRequest cannot be cast to class java.io.Serializable (com.inductiveautomation.ignition.common.rpc.impl.AlarmingRpc$IsAlarmActiveFilteredRequest is in unnamed module of loader java.net.URLClassLoader @2417551d; java.io.Serializable is in module java.base of loader 'bootstrap') at com.inductiveautomation.ignition.common.rpc.impl.AlarmingRpc$1.encode(AlarmingRpc.java:57) at com.inductiveautomation.ignition.common.rpc.proto.ProtoRpcSerializer.encodeValue(ProtoRpcSerializer.java:119) at com.inductiveautomation.ignition.common.rpc.proto.ProtoRpcSerializer.encodeRpcMessage(ProtoRpcSerializer.java:85) at com.inductiveautomation.ignition.common.rpc.proto.ProtoRpcSerializer.writeParameters(ProtoRpcSerializer.java:374) at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.lambda$invoke$5(GatewayInterface.java:323) at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.invokeRaw(GatewayInterface.java:355) at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.invoke(GatewayInterface.java:320) at com.inductiveautomation.ignition.client.gateway_interface.GatewayConnection$Rpc$RpcInvocationHandler.invoke(GatewayConnection.java:335) at jdk.proxy2/jdk.proxy2.$Proxy60.isAlarmActiveFiltered(Unknown Source) at com.inductiveautomation.ignition.client.expressions.ClientFunctionFactory$IsAlarmActiveFilteredFunctionClient.execute(ClientFunctionFactory.java:229) ... 26 more Ignition v8.3.0-beta4 (b2025081810) Java: Azul Systems, Inc. 17.0.15 ``` For 8.3.0, I also tested just the regular isAlarmActive expression using the example from the manual and had no errors. I tested the isAlarmActiveFiltered expression using the example from the manual and get the same error as my custom expression. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [September 15, 2025, 2:16pm UTC](https://forum.inductiveautomation.com/t/ign-14301-isalarmactivefiltered-expression-error/110629/2 "2025-09-15T14:16:20Z")
Hmm, thanks, trying to route this to the right team. ---
**Author:** ![Zachary\_Ray](https://avatars.discourse-cdn.com/v4/letter/z/dec6dc/32.png) [@Zachary\_Ray](https://forum.inductiveautomation.com/u/Zachary_Ray)\ **Post date:** [September 15, 2025, 2:19pm UTC](https://forum.inductiveautomation.com/t/ign-14301-isalarmactivefiltered-expression-error/110629/3 "2025-09-15T14:19:08Z")
Thanks for your response. Realistically, the new alarm metrics you guys have implemented are the route to go moving forward but we have a lot of implementations with older versions and it'd be nice to have templates that work between the two versions. Appreciate your response. ---
**Author:** ![ggross](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ggross/32/12668_2.png) [@ggross](https://forum.inductiveautomation.com/u/ggross)\ **Post date:** [September 15, 2025, 4:40pm UTC](https://forum.inductiveautomation.com/t/ign-14301-isalarmactivefiltered-expression-error/110629/4 "2025-09-15T16:40:29Z")
Unfortunately this is a bug in 8.3.0. Because of where we are with the release process, it will likely be fixed in 8.3.1. Thank you for reporting this. Garth ---
**Author:** ![ggross](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ggross/32/12668_2.png) [@ggross](https://forum.inductiveautomation.com/u/ggross)\ **Post date:** [September 15, 2025, 6:44pm UTC](https://forum.inductiveautomation.com/t/ign-14301-isalarmactivefiltered-expression-error/110629/5 "2025-09-15T18:44:40Z")
Split this topic on September 15, 2025, 6:44pm UTC 6 posts were split to a new topic: [[IGN-14308] UDT Member Alarms are not always populating when Active](https://forum.inductiveautomation.com/t/ign-14308-udt-member-alarms-are-not-always-populating-when-active/110636)