[KaktoR]

Me and Cesar done some tests

First, as mentioned above by user pincoball, the clsinit function was missing. Strange enough, because I'm sure I never touched this. That's why no search window was opened. But whatever.

Unpack will always fail if using a third command (lzma, lzma-mt, lolz, razor, zstd), xtool+srep works fine. xtool or srep alone works fine too. Even with CIU and other scripts.

There are some possibilities:
1. The archive size of 1mb per part. Most likely, because with bigger sizes it works (option 6 is most used for whole games by users here). And I can confirm this myself, because I use XTool+srep+LZMA-MT most of the time and never got issues.
2. Bug inside cls-diskspan, unarc.dll or isdone.dll. unarc.dll and isdone.dll are pretty old and never got updated since years. Maybe some incompatibilities or bugs they have with diskspan or vise-versa.

So really nothing I could fix.

However, I added the clsinit back and the search file will now work.