After that the _humanoid isn't recognized as a valid animation file by the glamerger.
The check depends on finding the magic word 2LGA as first 4 bytes in the header
can you open the gla file in a hex editor and tell me if the first bytes look like:
2LGA <4 bytes that are version> <path to gla> ...
or even better, if you can cut around 100kb of the file and email me at
or send on irc.gamesurge.net/#jediknight, my nickname there is ASk