Does this error have to do with my bug?

Referencing unkown database "unit/item" "selSize" I thinks that's right

The bug is when a unit picks up an item it disapears. Anybody know what this could be?

I'm pretty sure it's when a map from pre 1.13 is opened with 1.13

I don't know anything about the item dissapearance, but I know that's what it said when I opened up an old map on my friends comp. I think selsize means Selection Size... although I could be wrong.

Damn patch. ****ed up my triggers. They all worked before the patch but now they don't.