You should be able to reproduce it if you have special chars in your filename/foldernames like spaces and ' for example.
Cause that was the problem. like i said in the edit of my first post.Time to fix that bug in the code, probably best to use a normal chars only for the temp name of the file that SVP uses to render the file.
It would be easy from a scripting point of view to first store the original filename in a string var, and than rename the file to temp.SVP.temporary.mp4 to work with it,
And rename the resultfile back to originalfilename.SVP.mp4
That would fix this problem rightaway.
Thanks! I will work on it.