Don't really know how to explain the erorr so I'm just gonna say what I'm doing

I'm trying to convert a material in assman and I get this error anyone know how I can fix it?

I got all textures from Black Ops 2 IPAK's and are they in TGA format (dont know if this helps at all but I guess it's nice to know)

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I have never seen this error before and neither has a friend of mine who tends to know alot about assman

please note this is for Black Ops 1 assman not World at War assman

so no one knows how to fix this issue?

has anyone else ever even see this issue before?