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Using VBA On Error The VBA On Error statement - tells VBA what it should do from now on, within the vicinity of the current block of code (Function or Sub), The below example shows how it is done: Single VBA error handler If you want to handle all errors in a single section see example below: On Error GoTo ErrorHandler Dim Thank you for reading my question Greetings skofgar excel vba share|improve this question edited Jun 28 '14 at 13:37 asked May 17 '11 at 8:38 skofgar 7042916 7 rather than asked 5 years ago viewed 85916 times active 1 year ago Get the weekly newsletter!

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 Line 11 instructs the macro to resume executing at the ProcedureDone label on line 6. VBA error handling for the lazy, although beware in case of recurring errors (error overflow) - an error will still be raised On Error examples With the above synax in mind Excel VBA continues execution at the line starting with 'InvalidValue:' upon hitting an error (don't forget the colon).

A control on a form may hide itself at the wrong time. An "active" error handler is an enabled handler that is in the process of handling an error. A Note Of Caution It is tempting to deal with errors by placing anOn Error Resume Next statement at the top of the procedure in order to get the code to During the development stage, this basic handler can be helpful (or not; see Tip #3).

Instead, they occur when you make a mistake in the logic that drives your script and you do not get the result you expected. This causes an error (9 - Subscript Out Of Range), and the code jumps to the error handling block which creates the sheet, correcting the problem, and resumes execution at the If CloseMode <> 1 Then cmdCancel_Click End If End Sub Basically, you want to know which button the user pressed when the form closes. Unrecognized errors are redirected to the OtherError block.

You can also pass a value, such as a date, that can easily be converted to a string. errorerror handlingexceptionmacroVBA Post navigation Previous PostVBA Open Workbook and other VBA eventsNext PostVBA Compiler Add-In (to VB.NET) 5 thoughts on “Proper VBA error handling” Tom Wave says: November 4, 2015 at And thank you for the Resume

Resume Next 6. This statement instructs VBA what to do when an run time error is encountered. On Error Goto 0 On Error Resume Next On Error Goto

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 MsgBox "can't calculate square root at cell " & cell.Address 5. Moreover, Resume is the only way, aside from exiting the procedure, to get out of an error handling block. Whenever an error occurs, code execution immediately goes to the line following the line label.

This causes code execution to resume at a line label. If you don't already have a constants module, create one that will contain an ENUM of your custom errors. (NOTE: Office '97 does NOT support ENUMS.). It merely ignores them. But most procedures should have an error-handling routine, even if it's as basic as this one: Private | Public Function | Sub procedurename() On Error GoTo errHandler ...   Exit Function

Where else than after presenting the error message to the user? In some cases, only your application would crash (Microsoft Excel may stop working). The January worksheet is missing. Use "Set Next Statement" (Ctl-F9) to highlight the bare Resume, then press F8.

Situation: Both programs calculate the square root of numbers. Delivered Fridays Subscribe Latest From Tech Pro Research IT consultant code of conduct Quick glossary: Project management Interview questions: Business information analyst Job description: Business information analyst Services About Us Membership You can be sure which object placed the error code in Err.Number, as well as which object originally generated the error (the object specified in Err.Source).On Error GoTo 0On Error GoTo You need to provide an error Number.

Block 4 is a bare-bones version of The VBA Way. Well my routines got more or less quite long, but I've splitted it in about 10 Modules and tried to decrease the sizes of the routines... This situation arises when you want to execute a task knowing that it might generate an error, and often, the error is what you're after! If I could add, VBA has an Erl function that can be used within the error handler.

Outside the For Each Next loop, first add the following code line: Exit Sub Without this line, the rest of the code (error code) will be executed, even if there is Without an On Error statement, any run-time error that occurs is fatal: an error message is displayed, and execution stops abruptly. Error handling is important because in case of any unexpected exceptions your code doesn’t break. How to mount a disk image from the command line?

Custom VBA errors In some cases you will want to raise a custom error. Dev centers Windows Office Visual Studio Microsoft Azure More... Err object in VBA comes into picture whenever any runtime error occur. This makes VB(A) ignore the error. –RolandTumble May 19 '11 at 19:14 @skofgar--I owe that trick to Access 2007 Progammer's Reference from Wrox.

Block 3 fails because there is no Resume statement so any attempt at error handling after that will fail. Even if any fatal unexpected error occurs in the code then also you should ensure that the code should terminate gracefully. b. How?

End If Exit Sub ' Exit to avoid handler. To get the error description, after inquiring about the error number, you can get the equivalent Description value. When On Error Goto 0 is in effect, it is same as having no error handler in the code. When I'm doing something semi-risky (say, closing a DB connection that may or may not be open, where all I care about is that it's not open when I'm done), I

I would strongly advise using it, or something like it, because it's what any other VBA programmer inherting the code will expect.