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CDO? For more information, see Try...Catch...Finally Statement (Visual Basic).Note The Error keyword is also used in the Error Statement, which is supported for backward compatibility.Syntax Copy On Error { GoTo [ line The easiest number is 0. Are there any rules or guidelines about designing a flag?

I think I still need to get used to the VBA-Error Handling... ErrorHandler: ' Error-handling routine. The error is handled in the error-handling routine, and control is then returned to the statement that caused the error. c.

Almost worth the price of the book by itself. –RolandTumble May 19 '11 at 19:15 the On Error GoTo 0 was really useful to me, because I had the Browse other questions tagged excel vba or ask your own question. If PayrollEmployeeNumber = "" Then ' ... bCentralErrorHandler = gbDEBUG_MODE Else ' If this is a silent error, clear the static error ' message variable when we reach the entry point.

However, if the procedure in which the error occurs does not have an error handler, VBA looks backwards through the procedure calls which lead to the erroneous code. Moreover, Resume is the only way, aside from exiting the procedure, to get out of an error handling block. Applies To Excel 2016, Excel 2013, Excel 2011 for Mac, Excel 2010, Excel 2007, Excel 2003, Excel XP, Excel 2000 Type of Function Worksheet function (WS) VBA function (VBA) Example (as If you want the program to continue with an alternate value than the one that caused the problem, in the label section, type Resume Next.

You sub (or function), should look something like this: Public Sub MySub(monthNumber as Integer) On Error GoTo eh Dim sheetWorkSheet As Worksheet 'Run Some code here '************************************************ '* OPTIONAL BLOCK 1: If you have no error handling code and a run time error occurs, VBA will display its standard run time error dialog box. The Immediate window is an object you can use to test functions and expressions. Function Test(D As Double) As Variant If D < 0 Then Test = CVErr(xlErrValue) Else Test = D * 10 End If End Function This function will return a #VALUE!

I think my question is answered like this - there's no way to vote up your comment is there?, because it's a really good one :-) –skofgar May 17 '11 at Call the raiseCustomError Sub in the routine you may see the custom error ' 4. BTW, if you ever need me to do your company logo, look me up at http://www.MySuperCrappyLogoLabels99.com share|improve this answer edited May 18 '11 at 4:07 answered May 18 '11 at 4:01 Dim x As Integer = 32 Dim y As Integer = 0 Dim z As Integer z = x / y ' Creates a divide by zero error On Error GoTo

Run-Time Errors A run-time error occurs when your application tries to do something that the operating system does not allow. Note that these errors are meaningful only to Excel and have nothing at all to do with the Err object used to work with runtime errors in VBA code. Learning resources Microsoft Virtual Academy Channel 9 MSDN Magazine Community Forums Blogs Codeplex Support Self support Programs BizSpark (for startups) Microsoft Imagine (for students) United States (English) Newsletter Privacy & cookies This is why error handlers are usually at the bottom.

share|improve this answer answered Apr 29 at 20:31 GlennFromIowa 488414 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up The instructions below refer to his preferred method of error handling for functions the "boolean error handling" technique and not to the alternate "rethrow method", both described in his book "Professional Why does argv include the program name? Private Const ThisModuleName As String = "mod_Custom_Functions" Public sLocalErrorMsg As String Within each Sub/Function of the module I define a local variable Dim ThisRoutineName As String I set ThisRoutineName to the

Here an example: Private Sub cmdCalculate_Click() On Error GoTo ThereWasBadCalculation Dim HourlySalary As Double, WeeklyTime As Double Dim WeeklySalary As Double ' One of these two lines could produce an error, Use "Set Next Statement" (Ctl-F9) to highlight the bare Resume, then press F8. That's a good idea to check for the references. For example, imagine you create a button on a form, you name it cmdTestFullName and initialize it with a string.

I want them to return their real values (a string or double, e.g., or -1 if they fail in some cases) so I can nest them in other functions and not Before an error occurs, you would indicate to the compiler where to go if an error occurs. Sub Sample() Dim i As Integer, j As Integer On Error GoTo Whoa Application.ScreenUpdating = False i = 1111111111 For j = 1 To i Debug.Print ThisWorkbook.Sheets(1).Cells(i, 1).Value Next i LetsContinue: Is that really internal functionality? –Vantomex Oct 13 '10 at 2:33 @Vantomex Glad to help.

ErrorHandler ThisModuleName, ThisRoutineName, sLocalErrorMsg, Err.Description, Err.Number, False EXIT_RTN: On Error Resume Next ' ' Some closing logic ' End If I then have a seperate module I put in all projects Description The Microsoft Excel ISERROR function can be used to check for error values. Note that Err.Clear is used to clear the Err object's properties after the error is handled. Dev centers Windows Office Visual Studio Microsoft Azure More...

And hence we have set ‘N’ to its minimum value so that there are no side effects in the code due to uninitialized variables. 3. This is usually what I want/expect from my error handler... This will cause the error to be ignored. Err Object Assume if we have a runtime error, then the execution stops by displaying the error message.

This is what a typical subroutine call to bDrawCellBorders(myWS) would look like within an entry point. It doesn't specify line 0 as the start of the error-handling code, even if the procedure contains a line numbered 0. Const giBAD_RESULT As Integer = -1 Function TestMath() ' An Entry Point Dim sngResult As Single Dim iNum As Integer ' Call the function, actual result goes in sngResult but it Thanks for helping so many.

To further assist you with decrypting an error, the Err object provides a property named Description. Here is an example: Private Sub cmdCalculate_Click() ThereWasBadCalculation: MsgBox "There was a problem when performing the calculation" End Sub If you simply create a label and its message like this, its It should be okay, but it's not The VBA Way. Because there are many types of errors, there are also many numbers, so much that we cannot review all of them.

Join them; it only takes a minute: Sign up VBA Excel Error Handling - especially in functions - Professional Excel Development Style up vote 5 down vote favorite 4 I got In order to support the raising of exceptions of derived exception types, a Throw statement is supported in the language. It does not specify line -1 as the start of the error-handling code, even if the procedure contains a line numbered -1. For instance: For example I have a simple macro as follows: Sub GetErr() On Error Resume Next N = 1 / 0    ' Line causing divide by zero exception For i

Here is an example: Private Sub cmdCalculate_Click() On Error GoTo ThereWasBadCalculation Dim HourlySalary As Double, WeeklyTime As Double Dim WeeklySalary As Double ' One of these two lines could produce an Pearson Software Consulting Services Error Handling In VBA Introduction Error handling refers to the programming practice of anticipating and coding for error conditions that may arise when your program Microsoft Visual Basic provides as many tools as possible to assist you with this task. belisarius Oct 16 '10 at 0:27 add a comment| 3 Answers 3 active oldest votes up vote 29 down vote accepted First the good news.

We appreciate your feedback. In some cases, you may not be able to easily identify the source of error. Some other errors depend on the platform that is running the application (the operating system, the processor, the version of the application, the (available) memory, etc). The On Error Statement The heart of error handling in VBA is the On Error statement.

Instead, they occur when you make a mistake in the logic that drives your script and you do not get the result you expected.