Anybody using custom error handler

In some situations i suffer runtime errors and can't find the source (well the source is bad code for sure hehe). 
 

 According this page theres a way to log that errors on the internal memory of the rabbit to check later.
 

 ftp://ftp1.digi.com/support/documentation/html/DynCUsersManual/7rte.htm

 

 Anybody using this?
 

 I just need to save source and line code + the error code. And get a way to get from memory under the reset (that always end on a reset of my rabbit)
 

 If somebody have some source code doing this or can do that job please contact me.
 

 Best regards.