How can start or create the "backtrace"?

Hi, everybody:
when I start aMule in the terminal, it will display the following error informations:
2016-09-25 18:40:50: amuleAppCommon.cpp(333): Initialising aMule 2.3.1 compiled with wxGTK2 v2.8.12 (Debugging)
2016-09-25 18:40:50: amuleAppCommon.cpp(379): Checking if there is an instance already running...
2016-09-25 18:40:50: amuleAppCommon.cpp(410): No other instances are running.
aMule Version: aMule 2.3.1 compiled with wxGTK2 v2.8.12 (Debugging)

Terminated after throwing an instance of '13CEOFException'
what(): SafeIO::EOF: Attempt to read past end of file.
--== no BACKTRACE for your platform ==--


Abort (core dumped)
How can start or create the "backtrace"?
Thank you very much!
Hi, SirDice:
Thank you for reply me. I have read the "" that you tell me. But in FreeBSD system, no "bt" command, so I do not start or create "backtrace" yet.
Thank you again!
It's a command inside of gdb. Since aMule dumped core you can probably find amule.core in the directory you started it from. Run gdb amule amule.core first and try bt again.

Also see