Compiler Error C0164

Message

POU <name> writes to output <name> and is called in several tasks.

Message Cause

The device setting codegenerator\check-multiple-task-output-write is set and multiple tasks access the same output.

NOTE: The error is generated during the command Generate Code.

Solution

Do not call a program that changes outputs in multiple tasks.

Error Example

PROGRAM PLC_PRG
VAR
 Output AT %QB7 : BYTE;
END_VAR

Output := 0;

-->C0164: POU ‘PLC_PRG’ writes to output ‘%QB7’ and is called in several tasks.