Hi, Andy. which version is it - 1.16.1 or 1.16.2?

have you copied files from pit machine, or installed from scratch?

some links
https://SimHQ.com/forum/ubbthreads.php/ubb/showflat/Number/3835589/Searchpage/1/Main/378163/Words/%2BDDERR_INVALIDOBJECT/Search/true/what#Post3835589
https://SimHQ.com/forum/ubbthreads.php/ubb/showflat/Number/4328059/Searchpage/1/Main/410800/Words/%2BDDERR_INVALIDOBJECT/Search/true/re-problem-running-with-latest-install-of-eech-1-6#Post4328059