On Error Vba Not Working
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Excel Vba On Error Resume
them; it only takes a minute: Sign up Excel VBA: On Error Goto statement not working inside For-Loop up vote 7 down vote favorite 1 I'm trying to cycle through a table in excel. The first three columns of this table have text headings, the rest of them have dates as headings. I want to assign those dates, sequentially, excel vba on error resume next not working to a Date-type variable, and then perform some operations based on the date To do this I am using a foreach loop on myTable.ListColumns. Since the first three columns do not have date headers, I have tried to set the loop up so that, if there is an error assigning the header string to the date-type variable, the loop goes straight to the next column This seems to work for the first column. However, when the second column's header is 'assigned' to the date-type variable, the macro encounters an error even though it is within an error-handling block Dim myCol As ListColumn For Each myCol In myTable.ListColumns On Error GoTo NextCol Dim myDate As Date myDate = CDate(myCol.Name) On Error GoTo 0 'MORE CODE HERE NextCol: On Error GoTo 0 Next myCol To reiterate, the error is thrown on the second round of the loop, at the statement myDate = CDate(myCol.Name) Can anyone explain why the On Error statement stops working? excel vba excel-vba for-loop error-handling share|improve this question asked Aug 17 '12 at
frequent questions I come across relates to the situation where an active and enabled error handler section handles the first error as expected but then fails to handle any subsequent errors. (An enabled error handler is one that is turned on by on error goto doesn't work second time an On Error statement and an active error handler is an enabled handler that is in excel vba error handling best practice the process of handling an error.) Here's the explanation (it's a little long, but bear with me!): The On Error statement is the on error goto line heart of VBA error-handling. Without an On Error statement, any run-time error that occurs will display an error message, and code execution will stop. There are 4 distinct On Error options: On Error Resume Next On Error GoTo some_label/line_number http://stackoverflow.com/questions/11998836/excel-vba-on-error-goto-statement-not-working-inside-for-loop On Error Goto 0 On Error Goto -1 On Error Resume Next This is the simplest error handling option but also the most dangerous and most often misused. It ensures that when a run-time error occurs, control simply goes to the statement immediately following the statement where the error occurred, and execution continues from that point. There is no message to alert the user as to the fact that an error has occurred, or to what it might be. http://excelmatters.com/2015/03/17/on-error-wtf/ A typical good use of this structure is when there is a predictable error that you want to override – often assigning an object that may or may not exist to a variable. For example, when testing for the existence of a worksheet in a workbook, you can loop through all the worksheets checking the name of each one, or you can employ an On Error Resume Next statement like this: Dim ws as Worksheet On Error Resume Next Set ws = activeworkbook.worksheets("some name") If not ws is nothing then ' do stuff End If The danger of this is if you do not remember to reset error handling (by either simply disabling it with On Error Goto 0 or enabling an error handler – see below) all further errors in your code will be suppressed, which can make problems very hard to locate and debug – you may not even notice them until your code is already in real use, which is never a good thing! I frequently see people simply put On Error Resume Next at the top of their procedures when they can't figure out why an error is occurring – THIS IS NOT A GOOD IDEA!! On Error GoTo some_label/line_number Enables the error-handling routine that starts at the specified line label or number. If a run-time error occurs, control passes to that specified line, making the error handler active.
Forums Excel Questions VBA Error Handling Loop Not Working Second Time Around Results 1 to 5 of 5 VBA Error Handling Loop Not Working Second Time http://www.mrexcel.com/forum/excel-questions/782504-visual-basic-applications-error-handling-loop-not-working-second-time-around.html AroundThis is a discussion on VBA Error Handling Loop Not Working Second http://visualbasic.ittoolbox.com/groups/technical-functional/vb-vba-l/on-error-goto-does-not-work-1560516 Time Around within the Excel Questions forums, part of the Question Forums category; Hopefully this is something that is an easy fix that I am overlooking. I am wanting to loop through each ... LinkBack LinkBack URL About LinkBacks Bookmark & Share Digg this Thread!Add Thread to del.icio.usBookmark on error in TechnoratiTweet this thread Thread Tools Show Printable Version Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Jun 5th, 2014,04:52 PM #1 Chris Macro Board Regular Join Date Nov 2011 Location Ohio Posts 1,327 VBA Error Handling Loop Not Working Second Time Around Hopefully this is something that is an easy fix that I am overlooking. I am wanting vba error handling to loop through each slide and essentially skip slides that do not contain a shape called Graph2 or Graph3. My error handler works fine in skipping the Title Slide however the second time around I need to handle an error, I actually get an error message popping up. I believe I am not resetting my error handler properly. Any thoughts? Code: Sub ErrorHandlingProblem() Dim sld As Slide Dim shpSelected As Shape Dim shpTrigger As Shape For Each sld In ActivePresentation.Slides On Error GoTo SkipSlide Set shpSelected = sld.Shapes("Graph3") Set shpTrigger = sld.Shapes("Graph2") On Error GoTo 0 '[Do Something...] SkipSlide: Err.Number = 0 Next sld End Sub Share Share this post on Digg Del.icio.us Technorati Twitter My Beginner's Intro to VBA: Here My Excel/VBA Tutorial Blog: TheSpreadsheetGuru Receive my Tips & Tricks : Newsletter Using Office 2007 (Windows 7) & Office 2016 (Windows 10) Excel to PowerPoint Add-in|Waterfall Chart Creator |Analyst Tools Reply With Quote Jun 5th, 2014,04:55 PM #2 Jonmo1 MrExcel MVP Join Date Oct 2006 Location Bryan, TX Posts 41,984 Re: VBA Error Handling Loop Not Working Second Time Around You have to
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