Dear Mr. Erik,
Thanks for your reply. Just as you said, background posting is different to others. I remove the Job Queue Entries of CodeUnit 88 and restart the job queue then the background posting runs fine.
But something is still not right. When I post the SO, the Job Queue Status did change to ’Scheduled to Posting’ but then change to ’Posting’ right away. I don’t want this, I want the SO to be posted at the end of the day.
In the second link you suggest, it says: “Microsoft Dynamics NAV creates a job queue entry that specifies codeunit 88. The creation of the entry is automatic.”. Then how can I setup the Starting Time of this Job Queue?