# Error Opening Vision Client Launcher

**URL:** <https://forum.inductiveautomation.com/t/error-opening-vision-client-launcher/114900>\
**Category:** Ignition\
**Tags:** vision\
**Created:** [April 6, 2026, 2:58pm UTC](https://forum.inductiveautomation.com/t/error-opening-vision-client-launcher/114900 "2026-04-06T14:58:07Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**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:** [April 9, 2026, 3:22pm UTC](https://forum.inductiveautomation.com/t/error-opening-vision-client-launcher/114900/5 "2026-04-09T15:22:15Z")

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> [@Vision Client Project not opening after "Verifying Signature of Vision Client"](https://forum.inductiveautomation.com/t/vision-client-project-not-opening-after-verifying-signature-of-vision-client/114678/6):
>
> Error: Could not find or load main class com.inductiveautomation.ignition.client.launch.BootstrapSwing Caused by: java.lang.ClassNotFoundException: com.inductiveautomation.ignition.client.launch.BootstrapSwing This error means that the launchclient.jar file is somehow corrupted/invalid. Basically the only thing it contains is the BootstrapSwing class. Deleting it should force it to be downloaded fresh from the gateway, which hopefully would have fixed it. If you look at the file on disk, do…

Yes, without conclusive results. But the analysis of the issue is the same as what I posted in the other thread.

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