QProcess problem (Main program hangs)

[jacek]

Is this a memory problem or I'm just not using QProcess::execute() and QProcess::start() correctly?

QProcess::execute() is a static method, so you don't need a QProcess instance to invoke it, and even if you do have one, it won't affect it.

Do you wait for that eog application to close somewhere in your program?

Also, I do not know how to use task manager in ubuntu. can anyone point me to how I can manage the Qt Application when it hangs?

man ps
man kill