# Java cast Error in Scripting

**URL:** <https://forum.inductiveautomation.com/t/java-cast-error-in-scripting/103247>\
**Category:** Ignition\
**Tags:** scripting, ignition81, vision\
**Created:** [March 4, 2025, 10:35pm UTC](https://forum.inductiveautomation.com/t/java-cast-error-in-scripting/103247 "2025-03-04T22:35:47Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Nicole\_McCormack](https://avatars.discourse-cdn.com/v4/letter/n/b77776/32.png) [@Nicole\_McCormack](https://forum.inductiveautomation.com/u/Nicole_McCormack)\
**Post date:** [March 4, 2025, 10:35pm UTC](https://forum.inductiveautomation.com/t/java-cast-error-in-scripting/103247/1 "2025-03-04T22:35:47Z")

</div>

Help this script throws an error when I enter the data CLE-158 but then does what I want. I can't see what is causing a casting error as the tag ToolID is a string.

```python
print "before the read"
temp_tool_ID = system.tag.readBlocking(["[client]Build/TaskData/ToolID.Value"])[0].value
print "read toolID"
print temp_tool_ID
temp_tool_ID2 = temp_tool_ID.strip()
print "stripped ID"
print temp_tool_ID2
tool_ID_num = temp_tool_ID2[-3:]
print "last 3"
print tool_ID_num

```

```python
17:29:09.103 [AWT-EventQueue-0] ERROR c.i.i.client.util.gui.ErrorUtil - null
java.lang.ClassCastException: Error trying to coerce 'cle-158' to a number.
	at com.inductiveautomation.ignition.common.TypeUtilities.toNumber(TypeUtilities.java:838)
	at com.inductiveautomation.ignition.common.TypeUtilities.coerce(TypeUtilities.java:1256)
	at com.inductiveautomation.ignition.common.TypeUtilities.toInteger(TypeUtilities.java:1771)
	at com.inductiveautomation.ignition.common.TypeUtilities.coerce(TypeUtilities.java:1249)
	at com.inductiveautomation.factorypmi.application.binding.AbstractPropertyAdapter.setQValue(AbstractPropertyAdapter.java:223)
	at com.inductiveautomation.factorypmi.application.binding.AbstractPropertyAdapter.updateValue(AbstractPropertyAdapter.java:269)
	at com.inductiveautomation.factorypmi.application.binding.ExpressionPropertyAdapter.runExpression(ExpressionPropertyAdapter.java:89)
	at com.inductiveautomation.factorypmi.application.binding.ExpressionPropertyAdapter$1.run(ExpressionPropertyAdapter.java:59)
	at com.inductiveautomation.ignition.client.util.EDTUtil$ProcessQueue.run(EDTUtil.java:126)
	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)
before the read
read toolID
CLE-158  
stripped ID
CLE-158
last 3
158
before the read
read toolID
CLE-158  
stripped ID
CLE-158
last 3
158

```

---

<div class="post-metadata">

**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [March 4, 2025, 10:43pm UTC](https://forum.inductiveautomation.com/t/java-cast-error-in-scripting/103247/2 "2025-03-04T22:43:46Z")

</div>

That error appear to be happening outside your script. Show what else you have going on.

---

<div class="post-metadata">

**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [March 4, 2025, 11:05pm UTC](https://forum.inductiveautomation.com/t/java-cast-error-in-scripting/103247/3 "2025-03-04T23:05:36Z")

</div>

```python
	at com.inductiveautomation.ignition.common.TypeUtilities.toNumber(TypeUtilities.java:838)
	at com.inductiveautomation.ignition.common.TypeUtilities.coerce(TypeUtilities.java:1256)
	at com.inductiveautomation.ignition.common.TypeUtilities.toInteger(TypeUtilities.java:1771)
	at com.inductiveautomation.ignition.common.TypeUtilities.coerce(TypeUtilities.java:1249)
	at com.inductiveautomation.factorypmi.application.binding.AbstractPropertyAdapter.setQValue(AbstractPropertyAdapter.java:223)
	at com.inductiveautomation.factorypmi.application.binding.AbstractPropertyAdapter.updateValue(AbstractPropertyAdapter.java:269)
	at com.inductiveautomation.factorypmi.application.binding.ExpressionPropertyAdapter.runExpression(ExpressionPropertyAdapter.java:89)
	at com.inductiveautomation.factorypmi.application.binding.ExpressionPropertyAdapter$1.run(ExpressionPropertyAdapter.java:59)

```

Your script is not implicated.

You've got a property of an integer type, and you've got an expression running that's returning your `cle-158` string value. That value cannot be turned into an integer implicitly by the expression, so it's failing.