# Cannot use tag browse when creating new expression tag 7.5.7

**URL:** <https://forum.inductiveautomation.com/t/cannot-use-tag-browse-when-creating-new-expression-tag-7-5-7/6541>\
**Category:** Ignition\
**Created:** [May 21, 2013, 12:29pm UTC](https://forum.inductiveautomation.com/t/cannot-use-tag-browse-when-creating-new-expression-tag-7-5-7/6541 "2013-05-21T12:29:29Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![diat150](https://avatars.discourse-cdn.com/v4/letter/d/a587f6/32.png) [@diat150](https://forum.inductiveautomation.com/u/diat150)\
**Post date:** [May 21, 2013, 12:29pm UTC](https://forum.inductiveautomation.com/t/cannot-use-tag-browse-when-creating-new-expression-tag-7-5-7/6541/1 "2013-05-21T12:29:29Z")

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We get this error when trying to use the tag browser when creating a new expression tag

```auto
java.lang.OutOfMemoryError: Java heap space
	at java.util.Arrays.copyOf(Unknown Source)
	at java.io.ByteArrayOutputStream.write(Unknown Source)
	at com.inductiveautomation.ignition.common.Base64.decode(Base64.java:930)
	at com.inductiveautomation.ignition.common.Base64.decodeToObjectFragile(Base64.java:1017)
	at com.inductiveautomation.ignition.client.gateway_interface.ResponseParser.endElement(ResponseParser.java:152)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
	at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.getResponse(GatewayInterface.java:414)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:249)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.sendMessage(GatewayInterface.java:244)
	at com.inductiveautomation.ignition.client.gateway_interface.GatewayInterface.invoke(GatewayInterface.java:797)
	at com.inductiveautomation.ignition.client.sqltags.impl.db.DatasourceTagManager.browse(DatasourceTagManager.java:488)
	at com.inductiveautomation.ignition.client.sqltags.impl.db.DatasourceTagManager.browse(DatasourceTagManager.java:473)
	at com.inductiveautomation.ignition.client.sqltags.impl.ClientTagManagerImpl.browse(ClientTagManagerImpl.java:277)
	at com.inductiveautomation.ignition.designer.sqltags.tree.TagTreeNode.loadChildren(TagTreeNode.java:227)
	at com.inductiveautomation.ignition.designer.sqltags.tree.TagTreeNode.checkChildren(TagTreeNode.java:175)
	at com.inductiveautomation.ignition.designer.sqltags.tree.AbstractTagPathTreeNode.getChildCount(AbstractTagPathTreeNode.java:252)
	at com.inductiveautomation.ignition.designer.sqltags.tree.TagTreeNode.getChildCount(TagTreeNode.java:219)
	at javax.swing.tree.DefaultTreeModel.getChildCount(Unknown Source)
	at com.jidesoft.swing.TreeSearchable.populateTreePaths0(Unknown Source)
	at com.jidesoft.swing.TreeSearchable.populateTreePaths0(Unknown Source)
	at com.jidesoft.swing.TreeSearchable.populateTreePaths0(Unknown Source)
	at com.jidesoft.swing.TreeSearchable.populateTreePaths0(Unknown Source)
	at com.jidesoft.swing.TreeSearchable.populateTreePaths(Unknown Source)

Ignition v7.5.7 (b1387)
Java: Sun Microsystems Inc. 1.6.0_45
```

---

<div class="post-metadata">

**Author:** ![greg.simpson](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/greg.simpson/32/3135_2.png) [@greg.simpson](https://forum.inductiveautomation.com/u/greg.simpson)\
**Post date:** [June 26, 2013, 9:45pm UTC](https://forum.inductiveautomation.com/t/cannot-use-tag-browse-when-creating-new-expression-tag-7-5-7/6541/2 "2013-06-26T21:45:38Z")

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Are you running out of memory in the designer when you browse? That is what the message about “Java Heap Space” is indicating.