Hi, I have no problem running MMTTY as a stand alone program. Starting WT in RTTY mode is opening MMTTY and in Radio 1 RTTY window it says MMTTY is in progress to be loaded and later it says done. But, after about 10 seconds MMTTY is closing down with waterfall window. I have probably missed something simple, but what?? 73 Goran SM4DHF