Quote - why are you using version code 4.01? Ummm, isn't that just a reference to poser 4 in the file? I'm not really sure why your files aren't working as I've never gotten around to making a MAT pose file ( I always use mt5 or mc6). The MAT files are referencing texture files in the textures folder, if not you will get a prompt from poser asking you to locate the files. I would double check your textures folder to see if they have been placed properly anyway.

Here's some other peculiar facts, MAT pose files can only be applied to props if they are parented to a figure, UNLESS you are in the material room. In which case they can be applied without being parented.

Are you using poser 8 or above? If so, I'm pretty sure that you can apply materials from the library without going into the material room. (haven't tested this yet as I just got poser 8).

I think you Might have a problem with the file itself...

 

Are you applying these MATs to a figure object or a prop object? (clothing comes in both types, figures for conforming, props for dynamic.)

I'm on a mac so I usually have to manually place all of my poser files... Pretty tedious, but I know where everything is.

I'm applying the MATs to a figure. I don't think the location of the texture files is the problem, as Poser doesn't ask me where the files are when I try to render it. It's just like the poses have no effect whatsoever. But I don't think I'll bother with MAT poses anyway, considering what other people are saying. Clearly there are some downsides to not having upgraded to the latest version of poser ;) (i'm using poser 7)