.N2KM Exporting

So I got bored and decided to try modifying some headshapes with Blender for the first time. Some basic changes exported just fine, but when I deleted a section of someone's 3D hair, I got this error when I tried to export the model to .N2KM:

BlenderError.JPG

Any ideas/suggestions? Thanks

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You can NOT delete anything that's been there. We need to make the file size the same.

Okay, thanks