I've created a DIR in Tcode CV01N.
When I press F4 in CV02N, I can't find this DIR. But I can copy Document Number of this to CV02N and I can view/change it. Or I can find it in Tcode CV04N.
I use a new Document Type and it is transferred from another server by request transferring.
With standard Document Type like FOL, I'm able to find DIRs.
Perhaps have something wrong in the configuration. But I compared it to some standard Document Type, nothing strange