Instrument Control (GPIB, Serial, VISA, IVI)

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OPC servers: Demo period expired on loaded drivers or plugins

Hello, I'm starting to use OPC servers with the Omrom driver but several minutes after work a get an error which says:

The DEMO period has expired on one or more load drivers or plug-ins. If one of our drivers or plug-ins can help solve your comunications needs please call technical to purchase a license. This message does not appear when all drivers and plug-ins used by your application are registered

I have OPC servers registered, Have I to pay for each driver license?

Thanks



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Hello wakeup,

Thanks for contributing.

I am quite unsure about your system's set up. However it seems like you have the OPC servers installed in an evaluation mode, so it will restart every 2 hours of runtime.

For further info visit:

http://digital.ni.com/public.nsf/allkb/BD74000E22565DE9862573630055E40F?OpenDocument


In order to avoid the OPC server restarts you should purchase a license. Once purchased you should activate it through the NI license manager (Start>> All Programs >>National Instruments >> NI license manager).

If trouble persists after activation, please contact us again.

Hope this helps!


Guillem A.
Applications Engineering
National Instruments

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