VIs stop running after two seconds
 

On one laptop I am having a problem with VI's terminating a couple of seconds after deployment.

For instance, when running the Analog Input example I can deploy the VI, and it appears to run, but then it just stops after a couple of seconds. No error dialog box comes up - apparently the VI goes from running mode to stopped mode.

Other symptoms:
- the status led on the cRIO will start to intermittently blink three times (i.e. blink-blink-blink, pause, blink-blink-blink, pause, ...)

- the driver station indicates there is no communication with the cRIO

- if I single step through the code, I never make it through one iteration of the inner while loop; the top branch of the OR operator connected to the stop condition becomes true right away; if I remember the VI correctly, this is an error condition, but I haven't been able to figure out what the error is.

However, I don't have these problems on another laptop. The main difference between the two is that on the one that works I installed Windows 7 myself and the one that doesn't has a factory installed Windows 7.

Any ideas of what the problem is? Is there more I can do to diagnose the problem?

Thanks!

Re: VIs stop running after two seconds
 

Since it sounds like single stepping is an easy and quick way to reproduce the issue, I'd recommend placing probes on a few wires, or perhaps turning on execution hilighting (the light bulb on the toolbar), and stepping through the code to determine if there is a logic issue, what error may be reported, etc.

By the way, if there is an error you'd like to look up, there is a tool in the Help menu called Explain Errors which lets you type in the code and get some additional info.

If it still doesn't make sense, post a screenshot or attach a VI to help narrow it down.

Just guessing, it sounds like the VI is finishing because the loop and all other code has completed. When a LV VI terminates, there are no lights or dialogs, it simply set the arrow back so that you can run again.

Greg McKaskle

Re: VIs stop running after two seconds
 

One other thing to add:

According to http://digital.ni.com/public.nsf/all...256FDB00681951, a sequence of three flashes on the status LED indicates safe mode -- check the DIP switches (is the safe mode one different from the rest)? This might not apply to the FRC cRIO, but it probably does.

I hope this helps.

Re: VIs stop running after two seconds
 

You can find how to configure your dip switches on page 12 of the crio-frc_Operating_Instructions.pdf.
You can get to this from the start menu by going to Programs > National Instruments > CompactRIO > CompactRIO Manuals

This will open up the CompactRIO Manuals folder containing the crio-frc_Operating_Instructions.pdf, found at C:\Program Files\National Instruments\CompactRIO\manuals