Extension removed when restart tomcat

[AliBenBelgacem]

Hello,

I have thingworx 9.3 installed on my pc.

I installed this extension :

https://github.com/carlescm/ThingWorxConcurrencyExtension

the extention works fine. However, when i restart tomcat, thingworx remove the extension automatically !

do you have any aidea why i have this behaviour.

Thank you for your help.

[PaiChung]

Looks like it's an imported extension, so a little strange it disappeared.

Can you still see the extension files in the 'extension' folders?

I've never used this extension before, but perhaps it is not deployed correctly and doesn't end up in the right folders to be re-added on restart.

If you try to import the extension again, do you get some 'duplicate jar' violation?