Fanuc Alarm PS121 TOO MANY SUB,MACRO NESTING
Fanuc Alarm Description
The total number of subprogram and macro calls exceeds the permissible range.
Another subprogram call was executed during an external memory subprogram call.
1) The total number of subprogram and macro calls exceeds the allowable range.
2) An M98 or M198 command was called by external memory or a subprogram.
The program specified by M198 contains an M98 or M198 command.
The total of multiplicity of subprogram calls and macro calls exceeded the allowable range.