Message: Multiple assignments for operator '__New' not allowed
Possible error cause: In one line of code, the assignment operator ":=" is called a multiple number of times with the __New operator.
Error correction: Program the memory allocation with the __New operator in a separate line of code for each pointer that points to dynamically allocated
memory.
Example of the error:
PROGRAM PLC_PRG VAR pbAlpha : POINTER TO BYTE; // Typed pointer to Alpha pbBeta: POINTER TO BYTE; // Typed pointer to Beta xInit : BOOL := TRUE; xDelete : BOOL; END_VAR IF (xInit) THEN pbBeta := pbAlpha := __NEW(BYTE); // Incorrect code for memory allocation END_IF pbBeta := pbAlpha := 16#01; IF (xDelete) THEN __DELETE(pbAlpha); // Frees memory of pointer END_IF --> C0509: Multiple assignments for operator '__New' not allowed
Error correction:
PROGRAM PLC_PRG VAR pbAlpha : POINTER TO BYTE; // Pointer to Alpha pbBeta: POINTER TO BYTE; // Pointer to Beta xInit : BOOL := TRUE; xDelete : BOOL; END_VAR IF (xInit) THEN pbAlpha := __NEW(BYTE); // Allocates memory for Alpha pbBeta := __NEW(BYTE); // Allocates memory for Beta END_IF pbBeta := pbAlpha := 16#01; // Multiple assignment IF (xDelete) THEN __DELETE(pbAlpha); // Frees memory of pointer END_IF