FreeCAD 0.15 Windows - import stp file Error

[archang]

I import the stp file (D:\test.stp) in Windows, the following error occurs:

Traceback (most recent call last):
File "<string>", line 1, in <module>
<class 'Base.FreeCADError'>: cannot read STEP file

I can't add attachments now, upload status error!

[shoogen]

Does the file differ from download/file.php?id=12981 ?

[archang]

The same file.