Sinumerik Alarm 12641 Channel %1 block %2 maximum nesting depth of control structures exceeded

Sinumerik Alarm 12641 Channel %1 block %2 maximum nesting depth of control structures exceeded

Parameters:
%1 = Channel number
%2 = Block number

Definitions:
Max. nesting depth control structures (IF-ELSE-ENDIF, LOOP-ENDLOOP etc.) exceeded. At the present time, the max. nesting depth is 8.

Reactions:
– Alarm display.
– Interface signals are set.
– Interpreter stop
– NC Start disable in this channel.

Remedy:
Correct part program. If necessary, move parts to a subroutine.

Program Continuation:
Clear alarm with the RESET key. Restart part program