Photoshelter uploader error You must be logged into PhotoShelter to perform this

[mmp12345]

Uploading a bunch of Nikon RAW files throws the following errors and never completes.
Version 5.0, build 15011 (54772e6)
2013-11-09 22:31:13   [ERROR]   /Volumes/DATA-1/PICTURES/.../PH-0284.XMP   PhotoShelter   You must be logged into PhotoShelter to perform this action
2013-11-09 22:31:13   [ERROR]   /Volumes/DATA-1/PICTURES/.../PH-0284.NEF   PhotoShelter   You must be logged into PhotoShelter to perform this action

The behavior is reproducible.
Photoshelter support says they are not throttling the number of uploads, bandwidth or file size to log out the session in mid transfer.
Why does this happen and if it's a bug, what build is it fixed?
Thank you.

[Kirk Baker]

Uploading a bunch of Nikon RAW files throws the following errors and never completes.
Version 5.0, build 15011 (54772e6)
2013-11-09 22:31:13   [ERROR]   /Volumes/DATA-1/PICTURES/.../PH-0284.XMP   PhotoShelter   You must be logged into PhotoShelter to perform this action
2013-11-09 22:31:13   [ERROR]   /Volumes/DATA-1/PICTURES/.../PH-0284.NEF   PhotoShelter   You must be logged into PhotoShelter to perform this action

The behavior is reproducible.
Photoshelter support says they are not throttling the number of uploads, bandwidth or file size to log out the session in mid transfer.
Why does this happen and if it's a bug, what build is it fixed?

Please contact PhotoShelter on this issue.  They have taken over development of the PhotoShelter upload template for Photo Mechanic.  I do not know what the cause of this error would be and I do not know how to correct it for you.

-Kirk