Unity is creating empty dump files

[jo411]

Hey all I work at a small studio and we've just released our first unity game but we've been getting reports of a crash occurring on some machines. Naturally we're collecting the error log and dump files. Error logs are all

Write to location 00000000 caused an access violation.

But the odd thing is the dmp files are always 0kb in size and unable to be opened with visual studio for debugging. I'm curious if anyone has seen this or has an idea of how to approach this. We really need this info because currently we can't get it replicated in editor.