Excel VBA: On Error Goto statement not working inside For-Loop

Question

I\'m trying to cycle through a table in excel. The first three columns of this table have text headings, the rest of them have dates as headings. I want to assign those date

Answer 1

With the code as shown, you're actually still considered to be within the error handling routine when you strike the next statement.

That means that subsequent error handlers are not allowed until you resume from the current one.

A better architecture would be:

    Dim myCol As ListColumn
    For Each myCol In myTable.ListColumns
        On Error GoTo ErrCol
        Dim myDate As Date
        myDate = CDate(myCol.Name)
        On Error GoTo 0
        ' MORE CODE HERE '
NextCol:
    Next myCol
    Exit Sub ' or something '

ErrCol:
    Resume NextCol

This clearly delineates error handling from regular code and ensures that the currently executing error handler finishes before you try to set up another handler.

This site has a good description of the problem:

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Error Handling Blocks And On Error Goto

An error handling block, also called an error handler, is a section of code to which execution is tranferred via a On Error Goto : statement. This code should be designed either to fix the problem and resume execution in the main code block or to terminate execution of the procedure. You can't use the On Error Goto : statement merely skip over lines. For example, the following code will not work properly:

    On Error GoTo Err1:
    Debug.Print 1 / 0
    ' more code
Err1:
    On Error GoTo Err2:
    Debug.Print 1 / 0
    ' more code
Err2:

When the first error is raised, execution transfers to the line following Err1:. The error hander is still active when the second error occurs, and therefore the second error is not trapped by the On Error statement.