I am getting a weird error when running my code which is SMP

it is as follows
Starting pp with 4 workers
An error has occured during the function import
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/ppworker.py", line 79, in run
    exec __fobj
  File "<string>", line 1, in <module>
NameError: name 'pi' is not defined

My program is large enough so I wont be able to post it here but the call to the jobserver is


f = [(input,job_server.submit(mainf,(input,),depfuncs=(copyanything,list_of_variables,),modules=("math","subprocess","os","shutil","errno","random","numpy.matlib","Listparams","numpy.core.numeric as _nx"),globals=globals())) for input in x]

Listparams and list_of_variables are my own functions.

As I am relatively new to pp I am not being able to figure this out.  Can someone help me out?