i am using AIX OS.here i am facing a problem that when ever the process crashes there is no stack written in the log.it just gives an information of signal11/10/4 has occured. but no stack is shown. since the code is an optimized code i am even not able to debud using dbx.gdb is not installed. could you please suggest how to see the stack trace whenever the program crashes. might be with any other tool or incase any cheet method to follow to view the actual stack trace? advance thanks for the help.