On Error GoTo ... Resume Statement

Ŝaltas erarotraktantan procedon post okazo de eraro, aŭ reekrulas programon.

On [Local] Error {GoTo Labelname | GoTo 0 | Resume Next}

GoTo Labelname: Se eraro okazas, ŝaltas la erartraktan proceduron kiu komencu ĉe la linio "Labelname".

Resume Next: Se eraro okazas, programa ruliĝo daŭros de la ordono kiu sekvas la ordonon kie la eraro okazis.

GoTo 0: Malŝaltas la erartraktilon en la aktuala proceduro.

Local: "On error" is global in scope, and remains active until canceled by another "On error" statement. "On Local error" is local to the routine which invokes it. Local error handling overrides any previous global setting. When the invoking routine exits, the local error handling is canceled automatically, and any previous global setting is restored.

The On Error GoTo statement is used to react to errors that occur in a macro.

Sub ExampleReset
On Error GoTo ErrorHandler
    Dim iNumber As Integer
    Dim iCount As Integer
    Dim sLine As String
    Dim aFile As String
    aFile = "C:\Users\ThisUser\data.txt"
    iNumber = Freefile
    Open aFile For Output As #iNumber
    Print #iNumero, "Jen linio de teksto"
    Close #iNumber
    iNumber = Freefile
    Open aFile For Input As iNumber
    For iCount = 1 To 5
        Line Input #iNumber, sLine
        If sLine <>"" Then
            Rem
        End If
    Next iCount
    Close #iNumber
    Exit Sub
ErrorHandler:
    Reset
    MsgBox "All files will be closed",  0,  "Error"
End Sub