Handling Errors in NI LabVIEW


No matter how confident you are in the VI you create, which you cannot predict every problem a user can encounter. Mechanism to check for errors, which we know only that VI does not work properly. The Error checking tells you why and where errors occur.

Automatic Error Handling

Each error has a numeric code and a corresponding error message.

By default, the Lab VIEW automatically handles any error when a VI runs by suspending execution, highlighting the subVI or function where the error occurred, and displaying an error dialog box.

To disable automatic error handling for the current VI, to select the File»VI Properties and select Execution from the Category pull-down menu. Disable automatic error handling for any new, blank VIs you create, select Tools» Options and select Block Diagram from the Category list. Disable automatic error handling for a subVI or function within VI, then wire its error out parameter to the error in parameter of another subVI or function or to an error out indicator.

Explain Error

When an error occurs, right-click within the cluster border and select Explain Error from the shortcut menu to open the Explain Error dialog box. Explain Error dialog box contains information about the error. Shortcut menu includes an Explain Warning option if the VI contains warnings but no errors.

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