File locking error on Polyserve file system ADIOI_Set_lock

Hi,

I'm running an MPI application on a Polyserve file system and I'm getting the following error;

File locking failed in ADIOI_Set_lock(fd 11,cmd F_SETLK/6,type F_WRLCK/1,whence 0) with return value FFFFFFFF and errno 25.
If the file system is NFS, you need to use NFS version 3, ensure that the lockd daemon is running on all the machines, and mount the directory with the 'noac' option (no attribute caching).
ADIOI_Set_lock:: No locks available
ADIOI_Set_lock:offset 640, length 160
application called MPI_Abort(MPI_COMM_WORLD, 1) - process 2

This error happens when I try to write to a file with;

CALL MPI_FILE_WRITE(ifileHandle,str_buf,160,MPI_CHARACTER,istatus,ierrmpi)

I'm using Intel MPI 4.0.0.025. I also noticed that I had to make some modifications to file OPEN command since the file system wouldn't let me open files with 'shared' permission. Any help would be much appreciated.

Thanks,

GK