Ok, thought I would continue with this. Spoke to Tom who advised me (sorry Tom!) to delete the gamelist.txt file. Doing so reinstated the update list option. Hurrah. Ok, so, after doing another update on my merged 0.147 set, all almost came up roses. Tempest has appeared this time, but... no clones? (Tempest Tubes for example). These are visible and working in MameUI (147) fine, and yet don't appear in GameEx. Remember me mentioning that when using split sets, Tempest did not even appear? Well, there is an issue somewhere because again, this rom is affected. BTW, the romset is verified 100% by clrmamepro. I attach the ini file (as I should have originally) along with the gamelist file (which strangely contains Pong?) Also, there are two images. The first is to show that clones are listed for other games, and the second to illustrate the limited showing for Tempest. Any help would be wonderful. Logs.zip