Are you set up in company 3 with a Person record? Or are you a Global User only? I'm not sure if this makes a difference but it's worth checking. CompaniesBlock is a global block, independent of the company number.
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...
