This error usually indicates the user is attempting to execute multiple instances of Orca3D on a client computer, such as attempting to use the client as a TS/Citrix host.

This error can be seen when the user logged onto the LAN, then more than 1 person tried to do a remote desktop into that machine, or more than 1 person tried to access that computer in Terminal Services mode. Or, in plain language that means the end user tried to use the client computer as a TS/Citrix server, which is not allowed by the licensing system because it would defeat the control on the number of concurrent users allowed.