turning off file locking

[Foucar, James G]

Hello, I have been having off and on problems with file locking on NFS when
using pnetcdf. The error i get is: 

File locking failed in ADIOI_Set_lock. If the file system is NFS, you need
to use NFS version 3 and mount the directory with the 'noac' option (no
attribute caching).

My question is: is there anyway turn off file locking for the pnetcdf file?

Thanks,
James