On loading, djv_view create a handle on some files of the image sequence.
These files are not deletable and can not be replaced.
That means we can't render again the files if djv_view has loaded the image sequence...
Sorry for not responding to this originally but I've just released version 1.0 of the software and am trying to close out old issues.
I've added functionality to close the file handles when the file cache is enabled. When the file cache is not enabled the file handle for the current image needs to remain open since DJV uses memory mapping for performance. These changes will be included with DJV version 1.0.2.