[asterisk-users] unable to execute command from

[DOCAS DUDU ZULU]

hi

i am trying to execute the command from the dialplan as follows:

exten => 1987,1,Playback(posix-restarting)
exten => 1987,2,wait(1)
exten => 1987,3,System(/home/docas/Desktop/python mess1.py)
exten => 1987,4,Hangup


i get the error on asterisk CLI system_exec_helper:Unable to execute
"/home/docas/Desktop/python  mess1.py "

can anybody please help me on what i am doing wrong

thanks