Compiler Error C0454
Message: It is not possible to use an assignment expression with the __NEW operator in another expression. Use the pointer variable instead.
Possible error cause: An assignment with the __NEW operator is used directly in a test against 0.
Error correction: Use the assignment as a standalone statement. Use the POINTER variable in the condition of the IF statement.
Example 486. Example of the error:
PROGRAM PLC_PRG VAR pSt: POINTER TO ST_Data; END_VAR IF (pSt := __NEW(ST_Data)) = 0 THEN RETURN; END_IF
Message:
C0454: It is not possible to use an assignment expression with the __NEW operator in another expression. Use the pointer variable instead.
Example 487. Example of an error correction:
PROGRAM PLC_PRGVAR pSt: POINTER TO ST_Data; END_VAR pSt := __NEW(ST_Data); IF pSt = 0 THEN RETURN; END_IF