I am trying to import a list of about 400,000 records into a list. Upon completion of the upload, I only get 2k records imported with the rest returning an "Invalid Context Status" and failing. Would appreciate advise on this.
Figured out what was wrong. Initially the list was 2.2M long and I chose to go with the automatic mapping suggested by the wizard. This imported about 1.7 M customers and failed on the remainder. To get the remaining 400k records through, I had to clear all the recommended mapping and manually map the required field. I suspect the automatic mapping might have failed because of null values in the optional field.
Posting as an alternate answer as requested:
Typically this error is from trying to import subscribers with a status field value that isn't 'Active' or 'Unsubscribed'. You can't upload subscribers with a 'Bounced' or 'Held' status. Not sure if this was the case for you, but it's the only time I've seen it come up.