# 8.1.35 Upgrade: Unable to extract Ignition runtime files, classes.jsa

**URL:** <https://forum.inductiveautomation.com/t/8-1-35-upgrade-unable-to-extract-ignition-runtime-files-classes-jsa/83039>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [December 12, 2023, 4:01pm UTC](https://forum.inductiveautomation.com/t/8-1-35-upgrade-unable-to-extract-ignition-runtime-files-classes-jsa/83039 "2023-12-12T16:01:17Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![Louis\_Whitburn](https://avatars.discourse-cdn.com/v4/letter/l/8baadc/32.png) [@Louis\_Whitburn](https://forum.inductiveautomation.com/u/Louis_Whitburn)\
**Post date:** [June 6, 2024, 9:56pm UTC](https://forum.inductiveautomation.com/t/8-1-35-upgrade-unable-to-extract-ignition-runtime-files-classes-jsa/83039/10 "2024-06-06T21:56:16Z")

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If you're still having this issue I found a potential root cause: [Ignition Designer Launcher - Error launching application: NoSuchFileException - #10 by Louis\_Whitburn](https://forum.inductiveautomation.com/t/ignition-designer-launcher-error-launching-application-nosuchfileexception/89493/10)  
Turns out that it wasn't antivirus but some monitoring software we use.

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