Perhaps the following services cause this issue to occur:
Lab View, National Instruments Domain Service, Lookout Citadel
Server, or National Instruments Variable Engine.
Stop these services, start Sentinel, and then restart these
services.
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Open UDP 6001 port using your Windows Firewall exceptions.
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It is a problem for the license to work over a local area
network.
Manually open the port UDP 6001 from the Control Panel.
Go to Control Panel > Windows Firewall > Exceptions and add
the port UDP 6001 on the machine that has the MDTools License
Server.
Also add Inventor to the list of Exceptions on the client machine.
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Please update your Sentinel driver to version 7.4.2.
Sentinel
Protection Installer 7.4.2.zip (4.89MB)
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