I am only using MCS 3.0.0.5 as standalone , and PICBasicPro 2.45A. I do have Mplab V8.0 onboard but they no longer include the ability to compile from basic , and will only work with the *.asm file. If this programme compiles on your system , then it should compile on mine , unless I have a dodgy software loading.. I am about to remove PicBasicPro and MCS and reload them both.. I will post the results , most probably Monday....Thanks...Rod.