Migrating LW mdl7 exporter to 6.6 - compile issues

My bone based LW mdl7 output can no longer be read by the current Med 6.6, so I'm trying to update to the current lib, but have to use the LW lib set.
(Point animation still works, but the bones no longer show up like they did through 6.3)

I found the changes removing the old indexed normals, but I get two missing components in link -

__tell (which I have run into before)
I try to link in my own version -
__inline long _MSL_CDECL __tell(int fildes){ return (lseek(fildes, 0L, SEEK_CUR)); } in a cpp file
But I get a redefined error if I try to add it, and undefined if I do not!

I also have
__except_list as undefined. (can't find that anywhere in MS docs)

Is there code I can link in to properly satisfy what the MDL7.lib is looking for for these two items?
What compiler/version is the lib created with?

Thanks,
David