Becaues of continued delays to the Ninja, I reverted to using the bulk uploader last night.
Uploaded 3 lots no problem.
Today - I have another ready to upload but getting the following error message
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request. Please contact the server administrator, webmaster@localhost and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.