# IllegalArgumentException

**URL:** <https://forum.inductiveautomation.com/t/illegalargumentexception/72834>\
**Category:** Ignition\
**Tags:** ignition81, perspective\
**Created:** [April 24, 2023, 5:24pm UTC](https://forum.inductiveautomation.com/t/illegalargumentexception/72834 "2023-04-24T17:24:23Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![PRASHANTH\_KAKKIRALA](https://avatars.discourse-cdn.com/v4/letter/p/76d3ee/32.png) [@PRASHANTH\_KAKKIRALA](https://forum.inductiveautomation.com/u/PRASHANTH_KAKKIRALA)\
**Post date:** [April 24, 2023, 5:24pm UTC](https://forum.inductiveautomation.com/t/illegalargumentexception/72834/1 "2023-04-24T17:24:23Z")

</div>

Studently started seeing this error and Project is locked out.

```auto
IllegalArgumentException: com.inductiveautomation.ignition.common.project.resource.ResourceNamingException: Cannot add child 'com.inductiveautomation.perspective/style-classes/Framework/ColorPicker' to parent 'com.inductiveautomation.perspective/style-classes/framework' caused by ResourceNamingException: Cannot add child 'com.inductiveautomation.perspective/style-classes/Framework/ColorPicker' to parent 'com.inductiveautomation.perspective/style-classes/framework'

```

---

<div class="post-metadata">

**Author:** ![PRASHANTH\_KAKKIRALA](https://avatars.discourse-cdn.com/v4/letter/p/76d3ee/32.png) [@PRASHANTH\_KAKKIRALA](https://forum.inductiveautomation.com/u/PRASHANTH_KAKKIRALA)\
**Post date:** [April 24, 2023, 5:29pm UTC](https://forum.inductiveautomation.com/t/illegalargumentexception/72834/2 "2023-04-24T17:29:52Z")

</div>

Somehow there is a duplicate folder named (Framework) at the below location. By deleting the Framework/ColorPicker, the error is resolved and I'm able to open the project.

Folder path in Linux  
/usr/local/bin/ignition/data/projects/samplequickstart/com.inductiveautomation.perspective/style-classes/framework