Hi, i am currently using AIX 5.2 and wanted to profile a C++ program using gprof tool. I compiled and link the program with the appropriate flags, but when i execute the tprof command on the gmon file, it returns a "illegal instruction" error and no prof file is produced. Any idea what can be the problem? By the way, i am using VisualAge C++ compiler 6.0 to compile the program. Thanks