How many times this happens with Dynamics NAV users creating a Purchase order or releasing invoices or posting invoices, etc. keeps having this window saying The Reservation Entry table cannot be changed because it is locked by another user wait and try again. This interrupts productivity in many of the Medium and Large enterprises.

Most of the time, we are not running a large job, automatic cost posting is set to never and we do not analyses the view. We used to have this happen a lot when we had a number of similar users doing the same thing like posting consumption or purchase postings.

If you have access to see your development environment you can look at which table is locked and who is locking it. Then it can be visible what that user was doing as compared to whoever locked the table.

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Frequently Asked Questions

Why do locking issues occur in Dynamics NAV?

Locking happens when multiple users try to update the same table or record at the same time, especially during posting or consumption processes.

Which table usually causes locking in NAV?

The Reservation Entry table is the most common one to lock, as it records reservation and allocation data during posting.

When do users face locking errors in NAV?

It mainly appears during purchase postings, invoice posting, manufacturing consumption, or when several users perform similar tasks simultaneously.

How can I identify who is locking a table?

In the NAV development environment, you can check active sessions to see which user or process is locking the table.

How can MetaOption help resolve NAV locking issues?

MetaOption provides expert troubleshooting, optimization, and NAV/BC add-ons to reduce posting conflicts and improve system performance.