SIP command

i am using Zinc V2 10.0.11 on mac os 10.3. I want to convert image from one format to another
I am using
mdm.macshell_exec(sips -s format png somefile.pdf --out somefile.png)
but it is not working
If i run the same command on terminal it works
help me


Is it possible that Zinc requires you to enter your commands with absolute pathnames? Like /usr/bin/sip rather than just sip. I know nothing about Zinc, but this is a common issue.


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Operating System: Mac OS X (10.4)