Excel 2010 Vba Exit On Error
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Vba Error Handling Best Practices
to the Office Store All Documentation https://www.yammer.com/ http://feeds.feedburner.com/office/fmNx How do I... Miscellaneous Maintenance Maintenance Handle Run-Time Errors in VBA Handle on error vba Run-Time Errors in VBA Handle Run-Time Errors in VBA Compact and Repair a Database Recover Tables Deleted from a Database Handle Run-Time Errors in VBA TOC Collapse the table of content Expand the
Excel Vba Try Catch
table of content This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. Handle Run-Time Errors in VBA Office 2013 and later Other Versions Office 2010 Contribute to this content Use GitHub to suggest and submit changes. See our guidelines for contributing to VBA documentation. Errors and Error Handling When you are programming an application, you need to consider on error goto line what happens when an error occurs. An error can occur in your application for one of two of reasons. First, some condition at the time the application is running makes otherwise valid code fail. For example, if your code attempts to open a table that the user has deleted, an error occurs. Second, your code may contain improper logic that prevents it from doing what you intended. For example, an error occurs if your code attempts to divide a value by zero. If you have not implemented error handling, Visual Basic halts execution and displays an error message when an error occurs in your code. The user of your application is likely to be confused and frustrated when this happens. You can forestall many problems by including thorough error-handling routines in your code to handle any error that may occur. When adding error handling to a procedure, you should consider how the procedure will route execution when an error occurs. The first step in routing execution to an error handler is to enable an error handler by including some form of the On Error statement within the procedure. The On Error statement directs execution in event of an error
three flavors: compiler errors such as undeclared variables that prevent your code from compiling; user data entry error such as a user entering
Vba On Error Goto 0
a negative value where only a positive number is acceptable; and run
Vba Error Handling In Loop
time errors, that occur when VBA cannot correctly execute a program statement. We will concern ourselves here err.number vba only with run time errors. Typical run time errors include attempting to access a non-existent worksheet or workbook, or attempting to divide by zero. The example code in this article https://msdn.microsoft.com/en-us/library/office/ff193267.aspx will use the division by zero error (Error 11) when we want to deliberately raise an error. Your application should make as many checks as possible during initialization to ensure that run time errors do not occur later. In Excel, this includes ensuring that required workbooks and worksheets are present and that required names are defined. The more checking http://www.cpearson.com/excel/errorhandling.htm you do before the real work of your application begins, the more stable your application will be. It is far better to detect potential error situations when your application starts up before data is change than to wait until later to encounter an error situation. If you have no error handling code and a run time error occurs, VBA will display its standard run time error dialog box. While this may be acceptable, even desirable, in a development environment, it is not acceptable to the end user in a production environment. The goal of well designed error handling code is to anticipate potential errors, and correct them at run time or to terminate code execution in a controlled, graceful method. Your goal should be to prevent unhandled errors from arising. 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 Exit Sub, Exit Function, or Exit Property. The term end statement should be take
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 http://stackoverflow.com/questions/1377152/error-handler-exit-sub-vs-end-sub posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss http://www.globaliconnect.com/excel/index.php?option=com_content&view=article&id=348:excel-vba-errors-error-handling-on-error-resume-satements-exit-statement-err-object&catid=79&Itemid=475 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 takes a minute: Sign up Error Handler - Exit Sub vs. End Sub up vote 13 down vote favorite 1 Why would I want to get out of an Error Handler (after handling) with an Exit Sub instead of just on error letting it go to the End Sub? I'm sure it's simple. I just don't understand. Thanks for any help. Example: Public Sub SubA() On Error Goto ProcError ''# other code MsgBox FuncA() ProcExit: Exit Sub ProcError: MsgBox Err.Description Resume ProcExit End Sub vba vb6 error-handling share|improve this question edited Sep 4 '09 at 12:06 AnthonyWJones 144k22195274 asked Sep 4 '09 at 3:53 RNamo add a comment| 2 Answers 2 active oldest votes up vote 19 down vote accepted Your ProcExit label vba on error is your place where you release all the resources whether an error happened or not. For instance: Public Sub SubA() On Error Goto ProcError Connection.Open Open File for Writing SomePreciousResource.GrabIt ProcExit: Connection.Close Connection = Nothing Close File SomePreciousResource.Release Exit Sub ProcError: MsgBox Err.Description Resume ProcExit End Sub share|improve this answer answered Sep 4 '09 at 5:08 AngryHacker 23.1k60199387 1 +1. And, obviously, if you don't need to close or release any resources, there's no need for it and you can just fall through to the End Sub. –MarkJ Sep 4 '09 at 8:16 @MarkJ: Thats probably Ok but I'd be uncomfortable with that, If the error has truely been "handled" I'd prefer to Resume to ProcExit even if its immediately followed with Exit Sub. –AnthonyWJones Sep 4 '09 at 12:05 7 Wouldn't this cause an infinite loop if something below ProcExit raises an error? –Mike Spross Sep 5 '09 at 7:19 add a comment| up vote 1 down vote Typically if you have database connections or other objects declared that, whether used safely or created prior to your exception, will need to be cleaned up (disposed of), then returning your error handling code back to the ProcExit entry point will allow you to do your garbage collection in both cases. If you drop out of your procedure by falling to Exit Sub, you may risk having a yucky build-up of instantiated objects that are just sit
Errors & Error Handling, On Error & Resume Satements, Exit Statement, Err Object ------------------------------------------------------------------------------------------------- Contents: VBA Erros & Error Handling Error Handling Setting, in VBE Error Handler On Error Statements Using an Exit Statement Error Handling in Nested Procedures & The Resume Statement Get Information from the Error Object Raise Method of the Err Object: Generate a Run-time error ------------------------------------------------------------------------------------------------- Error Handling determines what is to be done next on the occurrence of an error. On encountering a run-time error, an On Error statement enables or disables an error-handling routine within a procedure. A Resume statement can only be used in an error-handling routine - it resumes execution at a sepcified point after the error-handline routine finishes. You can get information on the error from the properties of the Error object - this object is the Err Object. In this section, we cover: VBA Erros & Error Handling In vba programming you can have Syntax Errors or Run-time Errors. An error handler determines what action is to be taken within a procedure, on the occurrence of a run-time error. A syntax error occurs when you enter a line of code which is not allowed or recognized by Visual Basic. You will encounter a syntax error on misspelling a keyword or a named argument, for incorrect punctuation (ex. not specifying a comma as a placeholder for the omitted argument), use an undefined procedure, and so on. These errors are easier to locate as the Code Editor points them out at the time you are writing your code. A run-time error occurs at the time during which your code is running, that is after you have created your macro. There could be an error in your programming due to incorrect logic used in your code that prevents it from doing what you intended and may stop code execution, for example, if your code attempts to divide a value by zero. Another reason for an error which may cause even a valid code to crash could be a condition not being met, say, a reference to a worksheet in your code which has been deleted by the user. Other examples when a run-time error can occur are: on using incorrect variable names or variable types; if your c