Excel Vba Check For Error
Contents |
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or iserror vba posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss vba iferror Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only excel vba try catch takes a minute: Sign up If IsError in VBA? up vote 1 down vote favorite Is it possible to use something with similar functionality as Iferror(value, value_if_error) or Iserror(value) in VBA? I tried to write: If IsError(Cells(i, c) / curr) Then vba on error exit sub 'CODE BLOCK 1 else 'CODE BLOCK 2 end if But VBA tells me that I have division by zero error when it tries to run the if-statement. It throws me into debug. But this is just the type of thing I want to trigger CODE BLOCK 1! excel-vba share|improve this question asked Sep 1 '13 at 19:48 user1283776 1,85182755 1 Why do you not just check if curr is 0 ? –Alexandre P. Levasseur Sep 1 '13 at 19:54
Vba Error Handling Best Practices
But yes, VBA is notably bad at error handling. –Alexandre P. Levasseur Sep 1 '13 at 19:54 There can be other types of errors as well, like there being text in the numerator. The easiest would be to just check for any error. –user1283776 Sep 1 '13 at 19:55 1 I figured I would try LINE1: On Error GoTo ErrCurr LINE2: Cells(i, c) = Cells(i, c) / instanceCurrency LINE3: On Error GoTo 0. But strangely the division by zero error isn't sent to the error handler. It triggers the debug. Any idea why? –user1283776 Sep 1 '13 at 20:04 1 I found the reason. There were some earlier GoTo statements in the code (written by another guy) that caused problems. –user1283776 Sep 1 '13 at 20:20 | show 2 more comments 2 Answers 2 active oldest votes up vote 4 down vote accepted The usual way to handle this would be i = 0 On Error Resume Next n = 1 / i If Err.Number <> 0 Then 'Handle error - code block 1 Err.Clear On Error GoTo 0 Else On Error GoTo 0 ' No error - code block 2 End If share|improve this answer answered Sep 2 '13 at 6:37 chris neilsen 30.8k63967 add a comment| up vote 2 down vote You can call all worksheet functions using Application.WorksheetFunction.IsError(args) You could also try doing the calculation in a cell directly and query it's value
resources Windows Server 2012 resources Programs MSDN subscriptions Overview Benefits Administrators Students Microsoft Imagine Microsoft Student Partners ISV Startups TechRewards
On Error Goto Line
Events Community Magazine Forums Blogs Channel 9 Documentation APIs and reference vba on error goto 0 Dev centers Retired content Samples We’re sorry. The content you requested has been removed. You’ll vba error handling in loop be auto redirected in 1 second. Visual Basic Language Reference Statements F-P Statements F-P Statements On Error Statement On Error Statement On Error Statement For Each...Next http://stackoverflow.com/questions/18562252/if-iserror-in-vba Statement For...Next Statement Function Statement Get Statement GoTo Statement If...Then...Else Statement Implements Statement Imports Statement (.NET Namespace and Type) Imports Statement (XML Namespace) Inherits Statement Interface Statement Mid Statement Module Statement Namespace Statement On Error Statement Operator Statement Option
execution at a specified line upon hitting an error. Situation: Both programs calculate the square root of numbers. Square Root 1 Add the following code lines to the 'Square Root 1' command button. 1. First, we declare two Range objects. We call the Range objects http://www.excel-easy.com/vba/examples/error-handling.html rng and cell. Dim rng As Range, cell As Range 2. We initialize the Range object rng with the selected range. Set rng = Selection 3. We want to calculate the square root of each cell in a randomly selected range http://www.consultdmw.com/excel-macro-error-handling.htm (this range can be of any size). In Excel VBA, you can use the For Each Next loop for this. Add the following code lines: For Each cell In rng Next cell Note: rng and cell are randomly chosen here, you can on error use any names. Remember to refer to these names in the rest of your code. 4. Add the following code line to the loop. On Error Resume Next 5. Next, we calculate the square root of a value. In Excel VBA, we can use the Sqr function for this. Add the following code line to the loop. cell.Value = Sqr(cell.Value) 6. Exit the Visual Basic Editor and test the program. Result: Conclusion: Excel VBA has ignored cells containing invalid values such as negative numbers vba on error and text. Without using the 'On Error Resume Next' statement you would get two errors. Be careful to only use the 'On Error Resume Next' statement when you are sure ignoring errors is OK. Square Root 2 Add the following code lines to the 'Square Root 2' command button. 1. The same program as Square Root 1 but replace 'On Error Resume Next' with: On Error GoTo InvalidValue: Note: InvalidValue is randomly chosen here, you can use any name. Remember to refer to this name in the rest of your code. 2. 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 no error! 3. Excel VBA continues execution at the line starting with 'InvalidValue:' upon hitting an error (don't forget the colon). Add the following code line: InvalidValue: 4. We keep our error code simple for now. We display a MsgBox with some text and the address of the cell where the error occurred. MsgBox "can't calculate square root at cell " & cell.Address 5. Add the following line to instruct Excel VBA to resume execution after executing the error code. Resume Next 6. Exit the Visual Basic Editor and test the program. Result: Do you like this free website? Please share this page on Google+ 3/6 Completed! Learn more about macro errors >Go to Top: Error Handling|Go to Next Chapter: String Manipulation Chapter<> Macro Errors Learn
map Error Trapping and Handling in Excel Macros Errors occur during the execution of a macro due to a variety of reasons including the use of incorrect code and the macro being executed under circumstances for which it was not intended. Including error trapping in all your macros allows you to determine what happens in the event of any error. You gain control of the error and are in a position to take appropriate action without your users getting wind of there being anything wrong. Failure to include error handling may result in unwelcome and confusing Excel behaviour. At the very least, your users might be dumped out of their spreadsheet and into your code in the Visual Basic Editor, facing for them some bewildering error messages from Excel. At worst you could be faced with loss of recent changes to a spreadsheet or with Excel freezing and refusing to function at all. Simple Error Handler There are a number of ways in which you might choose to include code for error handling in a macro. This is the skeleton code for a simple way: Sub your_macro_name() ' ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ On Error Goto ErrorHandler your macro code here ProcedureDone: Exit Sub ErrorHandler: MsgBox Err.Number & ": " & Error.Description Resume ProcedureDone End Sub The On Error statement turns on error trapping. Information about any error that occurs subsequent to line 3 is stored in a VBA error object named 'Err'. In the event of an error, the On Error Goto ErrorHandler statement instructs the macro to stop executing your code at the point at which the error occurs and to pick again at the ErrorHandler label, line 9. Line 10 sends a message box to the screen displaying information about the nature of the error: Err.Number is a unique identification number for the error object drawn from VBA's library of errors Error.Description is a description of that error. L