Sinumerik Alarm 16937 Channel %1 action %2 <ALNX> not possible due to program test
%1 = Channel ID
%2 = Action number/action name
This action is not allowed as program test is currently active. Example: It is not permissible to activate block search via program test (PI service _N_FINDBL with mode parameter 5) when program test is active.
– Alarm display.
Deactivate program test.
Clear alarm with the Delete key or NC START.
- Siemens Diagnostics Guide by Siemens