fresh build, 1.6.0-beta-b59c, linux
I just select five classes in "Projects" view and press Alt+Shift-p. Attached
exception is thrown. Next time it works -> RANDOM.
Maybe not an error in the plugin - up to you.
Created attachment 28278 [details]
I tried to fix this though I was not able to reproduce and verify this.
I'll check it as soon as a new version is out.