how to make run time error in a callback

[Rafi2003]

Hi,

Assuming a main rountine execute RunUserInterface.

How to make a run time error in one of the Interface callback routines?

Thanks

Rafi

[bilalD]

If this is for your own validation, then you can pop up an error dialog. Something like MessagePopup() for example would work.

[RobertoBozzolo]

If your problem is how to catch runtime errors, correctly react to them and warn the operator, you may look at errChk and nullChk macros: they are defined in toolbox.h and extensively used in the Programmer's Toolbox that comes with CVI.

To make these macros more useful and general use, I made some additions to them and developed another set of macros which are described in this thread: inside it there is also a small routine that uses a MessagePopup to warn the operator of the problem occurred as Bilal suggested.

Remember that your routine will be blocked waiting for input when the popup message is shown, so I reccommend you emit the popup after the proper countermeasures are taken to correct the error.

[Rafi2003]

Thanks Roberto and Billal,

I can see how I jump to an error routing and print messages.  However, I'm aiming more towards a situation where the program is running under TestStand.  Usually I know how to create a run-time error so that TS displays a runtime error with some information. 

In this particular case, I'm referring to a situation were CVI is running a window (for barcode input in this case...) and is executing callbacks.  How do I return the error back to TS and terminate the program?

Thanks

Rafi

[RayFarmer]

Rafi,

You can perform the Execution.Terminate() method or Engine.TerminateAll(),

Use the TestError parameter to return any error back into your TestStand Step.

Regards

Ray Farmer