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This error message only occurs with a Floating or ASP license.

If you get this error message, it means either:

The License Manager on the Server has either been moved or has not been installed and activated correctly.

Or (most likely) that the ISV Server port is blocked in one or both directions. During the activation process, a high numeric port is randomly assigned as the ISV port. That port must be open on Client devices for outbound access so ExtendSim can request licenses from the License Manager on the Server. It must also be open for inbound access on the Server to allow internal communications between the Server files and so the License Manager can receive ExtendSim license requests. ISV ServerThe default ISV port is shown in the table when you click the Status command in the RLSA window. Either unblock the port listed in that table or (since a blocked ISV port could indicate an issue, plus the ISV port can change if the Server restarts) set a permanent unblocked port for the ISV as discussed in Changing the port for the ISV Server and in the document Frequently Asked Questions • Floating Licenses.