Modification of Global channels In NIMax while Labview Program running, not updating in Labview

Hello,
Okay, here is my issue. I have a program that reads data from a device using global channels in MAX.
Step 1: I open MAX with the systemExecute.vi with the parameters to wait till program finishes.
Step 2: I Modify a channel in Max, for example change the assigned daqMX Scale, or Min Max values.
Step 3: Save channel in Max.
Step 4: Exit MAX with the file exit.
Step 5: The Labview program continues, and I re-read the available global channels and global scales in the Labview vi but the properties have not changed to match what I change in MAX.
If I stop the VI then start it again and read the global channels then the properties get updated. How can I get the channel properties to update in Labview after changes are made in Max without stopping the labview vi and starting it again?

Many properties of the channel can only be modified when the task is not running. Have you tried stopping the task in LV before modifying the parameters, and then re-starting the task?
Dan

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I can not create an Installer, After install the Vision Builder Demo and then uninstall it. I can not create a Labview installer anymore, it asks me for a Vision Builder Installer, even if My Labview program does not have nothing to do with it...

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Go to Solution.

Hi Shada this can happen if you are including additional installers to your installer for example DAQmx. When you are doing this the installer has to include other files like MAX (Measuremente and Automation Explorer). Probably when you installed Vision Builder it updated MAX, so when your installer is trying to Include MAX, its asking for the source where it was installed in your computer in this case Vision Builder.
Here you can cache the information so its not asked again, or you can download a newer version fo DAQmx, so it will update MAX and change de dependecy.
You can find more details about this issue in this KB:
KnowledgeBase 3S88PJMY: Why Do I Get A "Missing Distribution" Error When Trying to Build an Installe...
And for keeping a copy here is more info:
How Do I Stop the Missing Distribution Notification Each Time I Build An Installer?
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Benjamin C
Senior Systems Engineer // CLA // CLED // CTD

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hi
i have two distinct computers and 2 labview programs running on each computer. in one computer labview program is prepared for data acquisition and saving acquired data. now i want to send these acquired data by cable to another computer to be processed. first i am searching for the best protocol for sending data between these two computers. it is important for me to diliver data near real time approximately in milisecond. and finally is there neccessary to have any special kind of software?
best regards
Message Edited by farashi on 01-30-2010 01:36 AM
Solved!
Go to Solution.

Farashi-
A real-time system doesn't mean an instantaneous system, or a fast system. It actually means a deterministic system, or a system that you know exactly how long it will take to complete a process. As was mentioned before, even Gigabit ethernet has latency, and that latency is not deterministic.
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http://zone.ni.com/devzone/cda/tut/p/id/4720
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Scott Wiest
Applications Engineering
National Instruments
National Instruments
Applications Engineer

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Derek,
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Attachments:
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Respected all,
I am facing probelm while running probe.vi.
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Respected Norbert,
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Modification of Global channels In NIMax while Labview Program running, not updating in Labview

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