Ferkkinhell

Ok, so I've done this hundreds of times before in the past couple of years, but now on a new blender install and new computer I'm just not able to export this model to a .nif.

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I'm exporting from blender 2.49b using all of the recommended settings, however the end result is an invisible object with only certain bits of data, listing the correct amount of vertices but no object. Importing a mesh straight from FNV and exporting yields useable mesh data, however my own mesh just... Doesn't.

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https://imgur.com/a/W1MwMGE

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Does anybody know what's happening? I've literally never seen this before and I've been modelling and