[Closed] max holding onto files

Has anybody else noticed that 3dsMax 2012 holds onto files after closing the ostream?

Ie. I save a .xml file via maxscript (by creating a new stream, then closing the stream)
But when I try to use this .xml file in other tools, they complain that another program is still using the file.

Is this a known issue? or did autodesk add something that I need to do to close and unlock files? Currently the only solution is to close max, which is a pain…

Thanks