Also having this issue, editor simply refusing to be of much help. Except for the entire map. 'AIGRID : FillInHeight: x and/or y is out of AIgrid bounds' followed by: Category: Code
Count: 1
Timestamp: 11-10-2017 23:57:45:539
Function: eoc::AiGrid::FillInHeight
Location: d:\jenkins\workspace\repo\rs3.0_fw3.0\modnew\stable\lsprojects\apps\dos2\code\eocshared\shared\AiGrid.h (741)
With this, everything remains unreachable. Tried painting it, using the box tool, reloaded level bounds and so on. Still no progress.