There is a virtual machine running a VeriStand project on a PXI target. If I open the example NI VeriStand - Open Wokspace Manager in LabVIEW 2020 on the same virtual machine, I get the connection to the VeriStand project with no error. But if I try to connect from the host PC I get the error 1172. I can ping the virtual machine and I opened all ports in the virtual machine
Solution: Create a second LAN interface on the host pc, set it as an additional netwerk adapter in the virtual box and connect to this ip with the NI VeriStand - Open Wokspace Manager.