abap/rabax_no_debug is a SAP Parameter attribute which is used to control Disallow debugging in case of a short dump information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
If a runtime error occurs, the initial screen of the dump display
appears.
If the user has debug authorization, he or she can analyze the error in
the debugger. To do so, the the data used by the application at the time
of the crash must be retained unchanged.
If multiple memory-intensive applications terminate within a short space
of time, and then remain on the initial screen of the dump display for a
longer period of time, this can lead to memory bottlenecks.
If the profile parameter is set, all application sessions are terminated
and therefore the memory used is released, before the initial screen is
displayed. This avoids the impending threat of bottlenecks. However, in
this case, it is no longer possible to debug the terminated application.
The parameter can have one of the following values:
'on' the parameter is active and is suppressing the possibility of
debugging. The occupied memory areas are released.
'off' the parameter is inactive. If the user has debug authorization, he
or she can analyze the error in the debugger. Occupied memory areas are
retained.
If the user does not have debug authorization, the occupied memory may
be released before the dump display is output, depending on the kernel
status (see SAP Note 1500931).
See SAP Parameter Documentation for full SAP documentation for this profile parameter.