I know how to use avp_check to determine if a variable is defined but I need to check if the same variable has a value or is null. Actually I simply want to check if it is not null. Is there a way to do this? Thanks,Steve -- ISC Network Engineering The University of Pennsylvania 3401 Walnut Street, Suite 221A Philadelphia, PA 19104 voice: 215-573-8396 215-746-8001 fax: 215-898-9348 sip:blairs@upenn.edu