I'm sorry, I have CJ2M PLC with CPU32. Of cource, I add array variable to In-Out var into my FB. But how can I do simple thing like thise (c++ for example) in cx-programmer? ************************************* Main() { myFB(int someArray[5]) { int outArray[5]; for (int i=0, i<5, i++) { outArray = someArray*2; } return outArray; } int inputArray[5] = {1,2,3,4,5}; int result[5] = myFB(inputArray); } ******************************************** cx-programmer drives me crazy(((