Error message in Yshari Sanctum

I get this error message when I kill "Al'Diablos, The Lord of Hatred" in Yshari Sanctum.



This fucking uberlevel I swear to god, drops left and right from polar worms and now this...

Is there a work around this? I'm only using windows 7 + D2SE + plugY, nothing else.

Last time I tried yshari I had it in the jungle area as well while beating those heroic shield tentacle monsters.

I don't remember the last time I had a crash on that level and I've done a lot of clears. Here are some suggestions:

- Could be a corrupted patch or d2data mpq. Try redownloading the median mpq again first. If error persists reinstall the whole d2 from a new source.

- Try running the yshari with plugy disabled and take out some items from your character's personal stash (i know it sounds weird but some user had a problem in the area due to it).

- Set compatiblity of d2 to winxp sp2 and run it with -ns command in the shortcut.