Error 3340 Query '' is corrupt

Hey, 

I've started getting an error when trying to load the geology or monitoring tables (GEOL & MONG). I've not altered these tables in the Data Template and even in older projects these tables no longer load. I tried repairing and converting the projects but this didn't work either. 

Has anyone else seen this before? Without remaking my my data template is there a way to fix this?!

Cheers!