Board Thread:Bug Reports/@comment-28153737-20161126165102/@comment-27219153-20161127004621

From what you are saying, it sounds like you found the few region files you wanted to keep and saved them elsewhere. Then you deleted all the region files and updated to B30. Then you added back in the region files that you saved from B29. Blocks get added, ids change etc. in most updates, thus the B29 ids were not mapped to the new B30 ids. You should've deleted all region files but the ones you wanted to save, and then updated with those few region files so that they would be mapped properly to their new ids. This is just what it sounds like you did, please correct me if I'm wrong.

How to fix: I would put the region files from B29 into a world (singleplayer should be fine, provided it has the same mods as the server had in B29) and load it up in B30 so that all the ids get updated to the new ones, then add it back to the server. I think this should work, but if not, I would try putting the server back to the way it was at B29 and updating it on the server itself, then adding the new region files from B30 after you update.

Also, regarding the log files have a file extension of log.gz. gz is just linux's form of zip. I think you need 7zip to extract them on windows.