Find First Error

Tests the error status of one or more low-level functions or subVIs that produce a numeric error code as output. Details

error codes is an array of the numeric error codes assembled from local subVIs or functions. If there is no error indicated in the error in cluster, the VI tests these codes in ascending order for non-zero values. If the VI finds a non-zero value, error out reflects the error status of that input.
error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurs before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.
status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
code is the error or warning code. The default is 0. If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
source messages contains the source message you want to appear in the error out cluster if the VI finds an error in error codes. Place each message on a separate line in a string constant or control. Use of this input is optional.
error? is TRUE if the error in cluster or any of the error codes reflects an error.
error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out indicator on the front panel and select Explain Error from the shortcut menu for more information about the error.
status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
code is the error or warning code. If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.
source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

Find First Error Details

If this VI finds an error, it sets the parameters in the error out cluster. You can wire this cluster to the Simple or General Error Handler to identify the error and describe it to the user.

The following illustration shows how you can use Find First Error in the example Write Binary File VI, located in examples\file\smplfile.llb. Find First Error creates the error cluster from individual error numbers and Simple Error Handler reports any errors to the user.