It is not possible to handle errors that arise inside error-handling code. Therefore, the declaration of a new error handler within an
error-handling section will lead to unpredictable behavior, since the second error-handling routine is activated only after the first error handler
has exited.
Noncompliant code example
Sub InitializeMatrix(Var1 As Integer, Var2 As Integer, Var3 As Integer, Var4 As Integer)
On Error GoTo ErrorHandler
'. . .
Exit Sub
ErrorHandler:
On Error GoTo ErrorHandlerLastResort
'. . .
Resume Next
ErrorHandlerLastResort:
'. . .
Resume Next
End Sub
Compliant solution
Sub InitializeMatrix(Var1 As Integer, Var2 As Integer, Var3 As Integer, Var4 As Integer)
On Error GoTo ErrorHandler
'. . .
Exit Sub
ErrorHandler:
'. . .
Resume Next
End Sub
