Your development environment has an Error object that will be triggered if any Library operation causes an error

Err.Number =                Some specific number

Err.Source =                   The Libraries name

Err.Description =          The specific Library operation that generated the error, the command issued and the associated MatLab error if any

Note that the Log feature records both the commands and any associated errors.

VB6 and VBA:  


    On Error Resume Next

    lib.Execute "z=cosss(5)"

    If Err <> 0 Then

        MsgBox Err.Description, vbCritical, Err.Source

    End If



some operation what may cause an error


       Display something to the user ...  Err.Description

End Catch


Log Errors:

The logging feature will also log any errors.

Display Errors:

The Figure.Display operation can potentially produce a number of errors or issues.  These Display issues are shown in the Plot window itself