Board Thread:LotR Mod Technical Support/@comment-29740540-20190802074437/@comment-25612015-20190802222905

If everything is reported as fine, then you may have an issue with an existing block or item, but with a unused data value. This is one of the things that can prevent a world from loading.

If that’s the case, after display of the blocks distribution or the items contained in region files, you’ll be able to remove the culprit with the replace command:

-r b,offending-block:value,DELETE/i,offending-item:value,DELETE