This can also happen if the HANSA.HDB is renamed, and the service is started back up. It creates an "empty" HANSA.HDB which is not set up for remote access, and the client gets that message.
More explanation @Paul:
When the issue occurs, should see if restarting presence or lookup helps. If so - that is the issue and should be sorted. First need to ensure that that is the issue...
Hello!
You can mark it as closed as option. If document is connected with other documents you can not delete it so you will not be able to delete PO, as you will not be able to remove Goods receipt...