No process instance

Can someone help with this problem? (No process instance was found as child of the activity with id)

Im getting this exception every time, i have a process wich calls another process, and that process also calls one like this:

process1 (KonfigSzamlaGen )-> process2 (this should be konfigszamla, but it does not appear in the log) -> process3(Szamlazzhu-ra Kuldes)

Im using call activity to call the processes.

Although i have this error, everything seems fine, my main process does finish and even the sub processes do they job.

Why am i getting this error?

before the error i have these lines: