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Issues When Accessing an RT Target with a Locked System Configuration with LabWindows/CVI Real-Time

Primary Software: LabWindows/CVI Add-ons>>Real-Time Module
Primary Software Version: 8.5
Primary Software Fixed Version: N/A
Secondary Software: N/A

Problem:
I have configured my remote RT system through Measurement and Automation Explorer (MAX) and locked the system configuration so nobody can edit my settings. However, I am unable to access the RT target through CVI and I received several error messages when I try. What's going on?

Solution:
Currently as of the LabWindows/CVI 8.5 Real-Time Module, you cannot access an RT target whose system configuration has been locked.

In MAX, after you configure the remote system, you can lock the system configuration with a password to prevent others on your network from changing the configuration. To actually lock your system configuration, you:

1. Select your remote system in the configuration tree and click Lock in the toolbar.
2. Enter and confirm a password.
3. Click OK to lock the system configuration.

After you have locked the system configuration, if you try and access the RT target through LabWindows/CVI, you will get several error messages depending upon your access method.  If you try and select the RT target through Run » Switch Execution Target, you will receive the message: "LabWindows/CVI has received an invalid reply to a debugging message."

If you try and use the LabWindows/CVI Real-Time File Copy Utility, you will get a different message depending upon which IDE you are working from. If are in LabWindows/CVI 8.1, you will get the message: "FTP Command failed; try using InetFTPSetPassiveMode".

If you are in LabWindows/CVI 8.5, you will get the message: "Cannot communicate with the specified target.  Confirm that the specified address is correct, the target is running, and the target has the LabWindows/CVI Run-Time Engine for RT installed.  You can launch MAX and use the LabVIEW Real-Time Software Wizard to install software on the real-time target."

As of the LabWindows/CVI 8.5 Real-Time Module, the only workaround is to not lock the system configuration

Related Links:
KnowledgeBase 2XM94EW: How Do I Configure and Use Access Control Settings on a Real-Time Controller?

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Report Date: 01/30/2008
Last Updated: 06/12/2008
Document ID: 4HTAQ8OF

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