I have an application using CNC GCode interpolation, but I need to modify the GCode provided to the PLC based on certain parameters. I am currently attempting to modify the SMC_GeoInfo objects in the SMC_OutQueue using the code below. Note that all the other code is pretty standard and works fine, but when I add the below it errors.

PROGRAM TEST
VAR
    fbReadCncFile : SMC_ReadNCFile2;
    fbCncInterpreter : SMC_NCInterpreter;
    arrCncInterpreter : ARRAY[1..99] OF SMC_GeoInfo;
    pGeoInfo: POINTER TO SMC_GeoInfo;
    giGeoInfo: SMC_GeoInfo;
    // ...
END_VAR

// ... Some code here in order to read CNC file using SMC_ReadNCFile2 and provide to SMC_NCInterpreter

pGeoInfo := SMC_GetObj(poq:=ADR(fbCncInterpreter.poqDataOut), n:=1);

IF pGeoInfo <> 0 THEN
    giGeoInfo := pGeoInfo^;
    // Do some manipulation here, then update the queue at the same position
    MC_SetObj(poq:=ADR(fbCncInterpreter.poqDataOut) , n:=0 , pgi:=ADR(giGeoInfo) );
END_IF

It throws an error when I get to the line giGeoInfo := pGeoInfo^;
Error:

EXCEPTION [AccessViolation] occured: App=[Sim.Device.Application], Task=[PathTask]

How do I use SMC_GetObj and access the data? It creates a pointer with the value as shown in the photo, but all the dereferenced values say dereference of invalid pointer.

Sometimes you just need to pose a question on a forum and re-read it to get clarity.

pGeoInfo := SMC_GetObj(poq:=ADR(fbCncInterpreter.poqDataOut), n:=1);

This won't work, I'm providing a pointer to a pointer, as poqDataOut is already a pointer! I just need to remove the ADR() and it works.

pGeoInfo := SMC_GetObj(poq:=fbCncInterpreter.poqDataOut, n:=1);