error-"remote panel exceeds maximum --licenses"

[lewb]

We send our customer  cFP-2020 with a compiled program.  User accesses the program with internet browser.  The usual precautions are observed such as closing the browser after use etc.  However it poses a serious problem somtimes when he tries to access and gets the message that the remote panel exceeds the maximum number of licenses.  Powering down and rebooting doesn't solve the problem.  Are there some subtle features or special cures for this.

[McKala[DE]]

Is there only one client accessing remote front panel or do other users have access to them?  The Knowledgebase,  How Do I Control the Number of Clients Remotely Connected To My VI? might be a good reference for you.

Let me know if this doesn't help.

[lewb]

I've been away for awhile.  There is only one user, sometimes  thru a wi-fi router.  It's a troubling feature for our customer.

lew

[DavidEngr]

Is there any chance they are establishing different remote panel connections through wi-fi and a wired connection?  I have written a short program that you can run on the 2020 that shows the current remote panel connections.  You can use this to help troubleshoot to see where the extra connection is coming from.

[lewb]

Thanks,

I'll give this a try and see if it tells us more about what's happening.

lew

[thisisnotadream]

I'm having a similar headache with my Real-Time program.  My users want access to the front panels of multiple VIs running at the same time on the real-time station (from a single host).  If they open and close them at will, eventually they run out of licenses.  I assume this is due to the fact that they have not released control before closing (which I do and don't run into the problem).   Is it possible to programmatically release licenses to VIs that are not being actively viewed?  There is no remote panel connection manager in the real-time OS. 

Dan 

[Devin_K]

Dan,

Have a look at the attached VI; it can be run on the RT target to close all remote connections.  You could modify it so that it runs when the total number of connections is equal to the total number of licenses you have.  You could maybe close all but the connection with the latest "Create Time" (to avoid completely disconnecting the user).  Play around with that and you should hopefully able to find something that suits your application.

Regards,

[thisisnotadream]

Perfect. 

This is exactly what I am looking for.  I will tailor this to my needs.  Thanks!

Dan

[ArnaudF]

We are facing a similar problem using a CompactRIO in this configuration:

- PC and cRIO configured with static IP addresses

- cRIO connected directly using a crossover cable to the PC (to be sure that only one physical client accesses the cRIO at a time)

- Labview 8.6.1, NI-RIO 3.1.1 with scan engine

We are able to access our remote front panel using Internet Explorer from the PC during 1-3 days. After that period, when we open our front panel using IE, a message states that the number of open remote panels exceeds the number of licences. But nobody is actually connected to the system.

We have tried the "Close Remote Panel Connections.vi" without success as well (using "c:\ni-rt\startup\startup.rtexe\MainPanel.vi" as the VI path for the "Open VI Reference" function).

The only workaround working for us is to reboot or power-cycle the CompactRIO, which is not acceptable in a production environment.

Any idea ?

Best regards,

Arnaud Faucher

[lewb]

The 5-license software seems to have solved our problem with the cFP-2120.  I think the basic problem relates to the Windows-Labview compatibility where user release is not always transferred to the Labview software.