B4J Question Problem while compiling

[GMan]

When compiling, sometimes the following error comes up:

Fehler: Beim Versuch, Datei C:\Users\franz\Documents\B4X\SpottyNEU\B4J\Objects\Spotty.jar zu öffnen, ist ein unerwarteter Fehler aufgetreten

Error: An unexpected error occurred while attempting to open the file C:\Users\franz\Documents\B4X\SpottyNEU\B4J\Objects\Spotty.jar

After this, i have to make a new path, copy all projrct files into it and can start again.

Whats the reason for that ?

 

[Daestrum]

Check task manager to make sure the old java process has ended. If it is still running it could lock the .jar on disk.

 

[GMan]

I tried this already 'cause i thougth the same.
Nothing to see in Taskmanager

Even after i switched the PC off and on the error occurs

Also deleting the .jar doesnt help