Using Subprocess.Popen to start another python script running in background on Window

[johnb546]

Hi,
New to Python but loving it. I am trying to run another python script using subprocess.Popen and have it run in the background. It works ok if I run it from the command line, however if I run it using our batch scheduling solution which is BMC Control-M the scripts starts but does not finish as it seems to be waiting for the child process to finish. If I kill the python running process the job completes successfully.

Any help appreciated.

Regards
Brian

import subprocess

def startlogging():
  DETACHED_PROCESS=0x0000008
 
  pid = subprocess.Popen(["python", "scriptname.py"], creationflags=DETACHED_PROCESS).pid

  pidid = str(pid)

  with open(Tr_Fj_Params.pid_file, "w") as f:
     wtrite_data = f.write(pidid)
     f.close()

if __name__ =='__main__':
  startlogging()