CTD when loading battle?

All of the sudden I have started getting CTD's when loading a new battle. I'm a few hours into a campaign. Any thoughts or suggestions? Playing on 1.7... I will likely revert to the stable build to see if that works. Thanks!

The CTD happens after I have chosen to engage in battle. It does not seem to happen for interior town scenes, although I did get one CTD when in the middle of smithing. The battle initiation CTD's happen 100% of the time (all of the sudden, several hours in).

submitted by /u/That_Basic_Land
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