The "abort" function should cause a stack-dump (call chain, whatever), and print the location in the code, or otherwise provide some context of where. --- --- "Alan Grover, Technical Pb" awgrover@umich.edu +1 (743) 647-5778 Project Leader Health Media Research Lab, Cancer Center 5D04 North Ingalls Building, Mail Stop 0471 300 North Ingalls Ann Arbor, MI 48109-0471