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Join them; it only takes a minute: Sign up Properly Handling Errors in VBA (Excel) up vote 34 down vote favorite 19 I've been working with VBA for quite a while Reason: Changed the title Register To Reply + Reply to Thread « Previous Thread | Next Thread » Thread Information Users Browsing this Thread There are currently 1 users browsing this share|improve this answer answered Oct 15 '14 at 14:02 sellC1964 311 add a comment| up vote 1 down vote Block 2 doesn't work because it doesn't reset the Error Handler potentially share|improve this answer answered Feb 17 '15 at 22:50 Luigi Mackenzie C.

If optional arguments are omitted and the Err object properties contain uncleared values, those values are assumed for your error values. The Err object's Raise method is useful to regenerate an original error in a vba procedure - if an error occurs within an active error handler which does not correct for Doing so will cause strange problems with the error handlers. Blocks 2,3 & 4 I guess are variations of a theme.

However, an overview of the Excel VBA debugging tools is provided on the Microsoft Help & Support Website. I followed the steps that James outlined on the machine that was breaking the code and afterwards it started working. This property holds a (usually short) message about the error number. How?

It is preferable to have a single exit point because usually some type of clean up is required before the procedure exits, ex. On Error GoTo ErrHandler   'Declare constants to indicate likely errors Dim iMarks As Integer, iTotalMarks As Integer, dPcnt As Double, response As Integer Const conErrorTypeMismatch As Long = 13 Const You should always use a Resume statement instead of a GoTo statement within an error-handling routine, because using a "GoTo line" statement apparantly deactivates subsequent Error Handling - even though both For example, using a Byte variable to assign a performed operation that produces a value the variable cannot hold As you may imagine, because run-time errors occur after the application has

This would typically be a short list of errors specifically only to your application. That could cause the error to repeat and enter an infinite loop. If the code causing the error is in a procedure with an On Error statement, error handling is as described in the above section. This is a trick I learned recently: It will never execute in normal processing, since the Resume

If an error-handling routine is enabled, procedure flow is directed to the error-handling routine which handles the error.   On Error GoTo line   The On Error GoTo line Statement enables Dennis I am using Windows 7 and Office 2007, all of my posts are based on this. If you dont implement error handling in your macro, on encountering a run-time error your code will stop execution and go into Break Mode and display an error message, thereby confusing How would a vagrant civilization evolve?

For example, On Error GoTo ErrHandler: N = 1 / 0 ' ' code that is skipped if an error occurs ' Label1: ' The Err Object Introduction To assist you with handling errors, the Visual Basic language provides a class named Err. In some cases, only your application would crash (Microsoft Excel may stop working). Excel links !!!

more hot questions question feed lang-vb about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation 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). 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 In this case you must ensure that your error handling block fixed the problem that caused the initial error.

We will concern ourselves here only with run time errors. Sadly, either have everyone you deal with use the office updates, then have them clear the office cache, or revert back to pre Dec '14 updates via a system restore (or You must immediately set another On Error statement to avoid problems as the previous error handler will "resume". Fortunately, the Code Editor is equipped to know all keywords of the Visual Basic language.

Create a new sheet and copy every thing from that to the new sheet and then finally delete that sheet. Is the NHS wrong about passwords? Thanks! That way, they can relay that message to you and you might be able to give them a work-around while you work on a fix.

One way you can deal with the problem is to provide an alternative to what caused the problem, since you are supposed to know what type of problem occurred (in the Exit Sub 'I was told a long time ago (10+ years) that exit sub was better than end sub...I can't tell you why, so you may not want to put in Visual Basic uses an enhanced version of the Try...Catch...Finally syntax already supported by other languages such as C++. The more checking you do before the real work of your application begins, the more stable your application will be.

Runtime ErrorsRuntime errors occur during the execution of your code, and cause the code to stop running. Unstructured exception handling using On Error can degrade application performance and result in code that is difficult to debug and maintain.In This SectionIntroduction to Exception Handling (Visual Basic)Summarizes how to handle define i as an integer, then attempt to assign the string "text" to i)53-File not found(occurs when attempting to open a file)Trapping Runtime ErrorsSome runtime errors may not be caused by A note on terminology: Throughout this article, the term procedure should be taken to mean a Sub, Function, or Property procedure, and the term exit statement should be taken to mean

If you forget to include a necessary factor in your code, you would get a syntax error. Introduction to Error Codes When an error occurs in your Microsoft Access application, Access provides an error number and description. Using the On Error Resume Next statement only defers error trapping & handling, whereas an error-handling routine handles the error and using the Resume Next statement therein resumes execution at same I know, not much of a solution, right?

Maybe the path specified for the picture is wrong. This has been explained & illustrated in Example 4 above.   Arguments of Raise Method: The Number argument is the error's number. This would be done as follows: Private Sub cmdCalculate_Click() Dim HourlySalary As Double, WeeklyTime As Double Dim WeeklySalary As Double ' One of these two lines could produce an error, such followed by the name of the function and its arguments, if any.

This statement instructs VBA what to do when an run time error is encountered.