Problems with HPL

Hi All, I'm running Informix 10.00.FC5 on an HP-UX box A problem presents itsself when trying to do an unload of the data from a table using an array of devices. I can create the device array and the job with no problems however while executing the job (which is a straight unload of a table to the 5 devices (files)), I get the error: Cannot unload to multiple devices with PDQ turned off, either at client or server side. This worked previously and I cannot figure out what has changed. We do set PDQ for our DS Queries which work fine. We have tried setting the PDQPRIORITY environment variable. Any pointers as to what am I missing would be appreciated Regards Mark