An error input

In 3d Max 8, before it work and now it gives an error everytime I try to export a sphere with a bitmap as a .DTS into the same folder. The error is "One export at a time: Export codenot re-entrant." I export it with the bounding box, non-animation, only with .jpg texture before and it work fine. I have restart over the program, created multi spheres, and still the same error. While there is only one object in the scene.