# Error Opening Vision Client Launcher **URL:** \ **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:** 5\ **Page:** 1
**Author:** ![chukwuemeka.agu](https://avatars.discourse-cdn.com/v4/letter/c/bb73d2/32.png) [@chukwuemeka.agu](https://forum.inductiveautomation.com/u/chukwuemeka.agu)\ **Post date:** [April 6, 2026, 2:58pm UTC](https://forum.inductiveautomation.com/t/error-opening-vision-client-launcher/114900/1 "2026-04-06T14:58:07Z")
![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/8/2/82a9f4cd44092f7009fe0014c0847f9c1e1b36cc.png)I ran into this issue while trying to setup vision client launcher for a client. Looking at previous posts led me to believe I could resolve the issue by deleting the runtimes folder within "C:\Users\username\.ignition\cache\resources\runtimes" but that runtimes folder already doesn’t exist within the resources folder which might be the issue. Does anyone know how I might get that runtimes folder setup. Is it missing because I only had the customer install Vision Client Launcher and not ignition.exe as well? ---
**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 6, 2026, 4:14pm UTC](https://forum.inductiveautomation.com/t/error-opening-vision-client-launcher/114900/2 "2026-04-06T16:14:38Z")
You can try removing the entire `.ignition/` directory, rather than just the runtime cache. The cache will automatically be repopulated the next time you launch an application using one of the launchers. > [@chukwuemeka.agu](#): > > Is it missing because I only had the customer install Vision Client Launcher and not ignition.exe as well? Client machines only need to install the client launchers; once connected the launcher will launch a series of processes that are able to stair-step into the correct environment. ---
**Author:** ![chukwuemeka.agu](https://avatars.discourse-cdn.com/v4/letter/c/bb73d2/32.png) [@chukwuemeka.agu](https://forum.inductiveautomation.com/u/chukwuemeka.agu)\ **Post date:** [April 6, 2026, 6:22pm UTC](https://forum.inductiveautomation.com/t/error-opening-vision-client-launcher/114900/3 "2026-04-06T18:22:03Z")
I see, I will implement this and update y’all with the result. ---
**Author:** ![chukwuemeka.agu](https://avatars.discourse-cdn.com/v4/letter/c/bb73d2/32.png) [@chukwuemeka.agu](https://forum.inductiveautomation.com/u/chukwuemeka.agu)\ **Post date:** [April 9, 2026, 2:11pm UTC](https://forum.inductiveautomation.com/t/error-opening-vision-client-launcher/114900/4 "2026-04-09T14:11:21Z")
I tried and I still came up with the same error message. Has anyone run into a similar issue. ---
**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")
> [@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.