Hi AceofCrazy,
This is something that will be fixed in the next patch. The gist of it is that, while most pathing is generated automatically, some parts need to be painted manually by designers and artists to allow for more versatility. To fix this now you would need to go over the entire map and compare the AI grid before generating it and after generating it, and then manually paint the differences. The error message is not something you will be able to avoid.
Last edited by Larian_JB; 30/10/17 08:15 AM.