Hi. I'm using ghc version 4.08.2 on windows NT. I tried compiling my program with -prof -auto-all. It runs up until input is required (from stdin) and then crashes claiming "The instruction at 0x0 referenced memory at 0x0. The memory could not be read". Is there a known problem with profiling on NT systems? Cheers, Theodore Norvell ---------------------------- Dr. Theodore Norvell theo@engr.mun.ca Electrical and Computer Engineering http://www.engr.mun.ca/~theo Engineering and Applied Science Phone: (709) 737-8962 Memorial University of Newfoundland Fax: (709) 737-4042 St. John's, NF, Canada, A1B 3X5