The following operations cause run-time exceptions in the form of SIGTRAP signals, which typically result in a "Trace/breakpoint trap" message:
The following operations cause run-time exceptions in the form of SIGFPE signals:
If you install one of the predefined XL Fortran exception handlers before the exception occurs, a diagnostic message and a traceback showing the offset within each routine called that led to the exception are written to standard error after the exception occurs. The file buffers are also flushed before the program ends. If you compile the program with the -g option, the traceback shows source line numbers in addition to the address offsets.
You can use a symbolic debugger to determine the error. gdb provides a specific error message that describes the cause of the exception.
Also see the following topics: