I'm working on a Macro to automate updating multiple design tables within an assembly at once. The assembly is based off of the customer part that is placed within the assembly. The first design table that gets updated is that of the customer part but, in order to update it, the name needs to be changed within the macro. In order to make sure that any of the engineers in my company can run the macro properly, I would like to warn the user if the part is not found (example: macro set to update design table for "Part1" but "Part 2" replaced "Part1"). Now the link between the part and macro is broken until the user edits the macro to use "Part2" in place of "Part1". How can I incorporate a warning to the user that tells them to update the macro if "Part1" is not found? Thanks in advance.

Macro:

    'Update Customer Part

    boolstatus = Part.Extension.SelectByID2("Part1@Untitled", "COMPONENT", 0, 0, 0, False, 0, Nothing, 0)

    Part.OpenCompFile

    Set Part = swApp.ActiveDoc

    swApp.ActivateDoc2 "Part1.SLDPRT", False, longstatus

    Set Part = swApp.ActiveDoc

    boolstatus = Part.Extension.SelectByID2("Design Table", "DESIGNTABLE", 0, 0, 0, False, 0, Nothing, 0)

    Part.InsertFamilyTableEdit

    Part.CloseFamilyTable

    Set Part = Nothing

    swApp.ActivateDoc2 "Untitled.SLDASM", False, longstatus

    Set Part = swApp.ActiveDoc