I think you don't want WNOHANG here... At least, with waitpid($pid,0) it does what I'd expect it to do.  Sample output: 

Process spawned with PID = 24247 
HELP_VALUE is 24247
ExitCODE is 2 
Process spawned with PID = 24248 
HELP_VALUE is 24248
ExitCODE is 1

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In reply to Re: IPC problem by almut
in thread IPC problem by gyre007

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