Error Checking Options

Upper Textures

Check to see if any Upper textures are missing.

NormalTextures

Check to see if any Normal textures are missing.

Lower Textures

Check to see if any Lower textures are missing.

X offsets

Check to see if X offset exceed texture limits.

Y offsets

Check to see if Y offset exceed texture limits.

Multi-Patch

Check to see if texture has more than 1 patch.

Sector Closed 1

Check to see if all linedefs match.

Sector Closed 2

Check to see if all SideDef references match.

Thing in Sector

Check to see if all Things are in sectors.

Things on Top

Check to see if all Things are on top of each other.

Check Tags

Check to see if that LineDefs have tags where required and that a matching Sector is found.

Check Overlapping Linedefs

Checks to see if any vertex is drawn on top of a Linedef, but the Linedef is not split there. For very large levels or slow machines, it may be preferred to turn this off and only run at the end. Be sure to check your level for a potential overlap problem. This is a very common problem with some editors, especially WadAuthor.