The dyn and the corresponding Revit rvt file are generated on PC A, then copied to PC B.
When opening both rvt and dyn on PC B, it says: Revit file is corrupted; as for dyn file opened on PC B, lots o wires are missing as you can see in the above image.
The same rvt and dyn are OK on PC A.
Both PC has Revit 2021.1.20.44 and Dynamo 2.6.1.