B4J Question Invalid/corrupt jar

[hakha4]

Made a small project that works ok in UI but when trying to make an executable jar file it says 'invalid or corrupted file' when double click on the file. Tried to move code to a new project and start from scratch but same issue.When launching jar file from command prompt (win64) but I never get any errors,just as abowe. Updated Java and reinstalled Java SDK ( as someone in forum suggested) BUT no success. Anyone have ideas where to start debug this problem ?
Any help appreciated

 

[sorex]

Is this a B4J project? then you're posting in the wrong forum.

 

[hakha4]

Is this a B4J project? then you're posting in the wrong forum.

Ooops! You're right,posted in wrong forum. I see If I can move it to B4J instead

 

[Erel]

How are you building this jar file? Please run your app in Release mode and then upload the jar file.

 

[hakha4]

My fault! Didn'trealize that I should RUN in release mode and that a jar file was created . I was doing Compile to library in project menu. I'm so used to compile for making an exe in other programs. Sorry to take up your time!