I have recently run into an odd thing with a PCPERFORM statement. In a UNIBASIC program I call a C program using PCPERFORM. This C program prepares a file for further processing. I have always assumed that the PCPERFORM would wait for the C program to finish before continuing. This morning however if appears that the C program took four hours to complete and that the UNIBASIC program continued on and processed yesterday's file.

Does anyone know whether PCPERFORM is Synchronous or Asynchronous?
CDS

CShaffer wrote:
Used many PCPERFORMS on UniData but never had the situation you
described.
Just a thought.
Is this on a Unix system?
Does the shell command you PCPERFORM have an & at the end of the line?
& at the end of the line of a Unix shell command will run the task in
backround and return back to you immediatley.

Jeremy Thomson