SCL FC blocks make LAD program stop

As soon as an FC block (written by me in an SCL source file, inserted in a LAD project) gets signal, the program stops. If it's in a network, but has no signal in, the program runs. I can upload a download link for the project if that helps... (Variables are named in Hungarian but that should not be a problem). (Siemens Symatic S7) (Also I couldn't get "ELSE IF" to work, but that's not a big deal in my code.)

Thanks!

Step 7 classic or TIA?


Post the link to the project.

You probably have a zero division or some out of bounds array. That would only halt the CPU when called. ELSE IF is ELSIF in Structured Text (Siemens SCL)