Yes, when attempting to open a save file using GE.
I open GE, it starts fine, auto-initializes and finishes with no errors and everything seems to be working fine. At the top it also says Verifying Gnomoria configuration: Settings OK! Then I click File > Open, choose my .sav, and then this error pops up in its own dialog with "OK" being the only option. Clicking this closes GE. This error is also reported in red in GE's log/console.
I did unzip the entire archive into Gnomoria's folder along with all of the other files as instructed. The "7-zip library" listed in the error is there in the folder as 7z.dll. I haven't tried to use GE before this, so I've never gotten it to work on this installation (not sure if it would have before), but at least I know I'm not the only one getting this error.
Any ideas? :\
Edit: Huh, so I did some tinkering around and haven't fixed anything yet, but have some observations that may or may not be of use. I changed the file name of 7z.dll to 7-zip.dll just in case that was it, but this in turn caused initializing to fail, with the same error message! Saying that the 7-zip library did not exist. But when I changed the name back to 7z.dll, initializing worked, so it was able to find that 7-zip library during initialization, but not when loading a saved game?
Secondly, I noticed that the console message in the background is more specific than the dialog that pops up, and actually names a function. It states:
[E] : [Main] LoadGame_DoWork failed at gnomoria.LoadGame with message: Can not load 7-zip library or internal COM error! Message: DLL file does not exist.
Will continue tinkering for a bit and report back if anything changes
Oh, also, I'm not playing this from Steam, unlike Zanarhi who reported the same error.