Adriaan:

Did you try the addr2line utility (mentioned in a previous email) ? Or run the program under control of gdb and then use the 'bt' command to list a backtrace when it crashes.

Thanks! That did the trick!

Tom

Dr. Thomas D. Schneider National Institutes of Health National Cancer Institute Center for Cancer Research Nanobiology Program Molecular Information Theory Group Frederick, Maryland 21702-1201 toms@ncifcrf.gov permanent email: toms@alum.mit.edu (use only if first address fails) http://www.ccrnp.ncifcrf.gov/~toms/