Yeah, I have 32 bit Java. The MO binary points to C:\Program Files (x86)\Java\jre1.8.0_31\bin\javaw.exe I deleted and reinstalled MO fresh, and drilled my load order down to just the original .esm's, SUM, PaMa, and DSR. SUM wouldn't run either of the other patchers at all under those conditions, but PaMa and DSR run just fine, so I'm completely out of ideas. I'm going to keep testing my load order to find out what's breaking PaMa and DSR, but since I already tried eliminating all my recent downloads, updates, and file edits, I suspect it's going to turn out to be something I was using just fine before. I'm kind of sick of working on this troubleshooting project (this is the third time I've had trouble with SkyProc in MO since the 1.2.16(?) update that broke it in January). If nobody has any other suggestions I guess I'm going to have to try NMM next. :confused: Thanks for the help, though.