Catch Runtime Error Vb6
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an application in VB6. In client's environment it raises runtime errors which I can't reproduce under debugger. Is there any way to get the stacktrace or location of error? I created log file and I used Err.Description,Err.Source but it gives blank values. Please help me. my method(...... On Error GoTo Error_Handler ......... Error_Handler : writeToLogFile(Err.Source,Err.Description) vb6 error-handling share|improve this question edited Jan 19 '10 at 7:39 asked Jan 19 '10 at 7:23 Royson vb6 runtime error 3265 78691743 You probably know this, but just in case, VB6 is completely unsupported as of March 2008: msdn.microsoft.com/en-us/vbrun/ms788707.aspx I'm guessing you're providing legacy support or something. –T.J. Crowder Jan 19 '10 at 7:31 @T.J. Crowder. That's not completely correct. The VB6 IDE is unsupported but the VB6 runtime is supported for the full support lifetime of Windows 7, which is until about 2019 msdn.microsoft.com/en-us/vbrun/ms788708.aspx –MarkJ Jan 19 '10 at 8:56 @MarkJ: Very useful distinction indeed, thank you. @OP and other readers: If you don't read the link, just be clear that when they say the IDE, that includes the compiler (e.g., the compiler has been unsupported for more than a year and a half); it's the runtime that will continue to be supported through Windows 7 (but not, they say explicitly in that article, beyond that). Cheers again, Mark. –T.J. Crowder Jan 19 '10 at 13:07 @T.J. Crowder. Me again, sorry! The article says "there are no plans to include VB6 runtime in future versions of Windows beyond Windows 7". IMHO that doesn't say they definitely won't support it beyond Windows 7. It just says they haven't made their minds up yet, but in a way that's calculated to try to push people away from VB6. –
Database Guide User login Username: * Password: * Request new password Home › Tutorials Error Handling In Visual Basic Level: Despite your best efforts to cover all possible contingencies, run-time errors will occur in your applications. You vb6 runtime error 429 activex can't create object can and should do all you can to prevent them, but when they happen vb6 runtime error 75 path file access error you have to handle them. Introduction Trapping Errors at Run-Time Building Error Handlers Raising Your Own Errors Summary Introduction The various functions, vb6 runtime error 430 class does not support automation statements, properties and methods available in Visual Basic and the components used in Visual Basic expect to deal with certain types of data and behavior in your applications. For example, the CDate() function can convert http://stackoverflow.com/questions/2091787/vb6-how-to-catch-exception-or-error-during-runtime a value to a Date variable. The function is remarkably flexible in the type of information it can accept, but it expects to receive data that it can use to derive a date. If you provide input that it can't convert, it raises error number 13 - "Type mismatch" - essentially saying "I can't handle this input data." In an application, this type of error may be a program logic error http://www.vb6.us/tutorials/error-handling (you simply passed the wrong data) or it may be a data entry error on the part of the user (you asked for a date and the user typed a name). In the first case, you need to debug the program to fix the mistake. However, there is no way for you to anticipate the behavior of the end users of the application. If the user enters data you can't handle, you need to deal with the situation. Dealing with errors at run-time is a two step process: Trap the Error Before you can deal with an error, you need to know about it. You use VB's On Error statement to setup an error trap. Handle the Error Code in your error handler may correct an error, ignore it, inform the user of the problem, or deal with it in some other way. You can examine the properties of the Err object to determine the nature of the error. Once the error has been dealt with, you use the Resume statement to return control to the regular flow of the code in the application. In addition to dealing with run-time errors, you may at times want to generate them. This is often done in class modules built as components of ActiveX
syntax errors are incorrectly typed words, unmatched if statements etc. Among all, syntax errors are the easiest to detect and rectify. Logical errors are errors in the logic of http://free-visualbasic-tutor.blogspot.com/2011/07/runtime-error-handling.html the program. That means the entire program runs, but it doesn't produce the http://www.vbforums.com/showthread.php?534867-RESOLVED-Excel-How-do-i-trap-a-VBA-runtime-error-using-Error-Handler results that are required. Logical errors are very difficult to detect and remove. Sometimes days may be passed but the errors may not be detected. So logical errors could cause nightmares. The task of finding out the errors becomes difficult proportionate to the size of the program. Runtime errors are the errors runtime error that occur during the execution of the program and cause program to be terminated abruptly. A few examples of runtime errors are Division by Zero, File not found and Disk not ready. A good program should not be terminated abruptly. So we have to take control when a runtime error occurs and handle the errors (recover from the error). How To Handle Runtime Errors To handle vb6 runtime error runtime errors we have to use On Error statement. On Error statement sends control to the given label whenever a runtime error occurs in any of the statements given after On Error and before the end of the block (procedure or function). The following are the various formats available for On Error statement. On Error GoTo line On Error Resume Next On Error GoTo 0 We will discuss about last two syntaxes later. First let us concentrate on first syntax. Line is either the line number or a label that is given before the line. Whenever an error occurs in the code that is after On Error, control goes to the given label. Let us assume we want to open a file. We take filename from user using an InputBox. If file is not opened Visual Basic, by default displays a runtime error and terminates the program. To prevent it now we want to handle runtime error that might occur during Open statement as follows: Private Sub Command1_Click() On Error GoTo errlabel fn = InputBox("Enter filename") Open fn For Input As #1 ' process the file Close #1 Exit Sub errlabel: MsgBox "File not
VBA runtime error using Error Handler? If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Results 1 to 5 of 5 Thread: [RESOLVED] [Excel]How do i trap a VBA runtime error using Error Handler? Tweet Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Aug 7th, 2008,07:39 AM #1 allankevin View Profile View Forum Posts Thread Starter Addicted Member Join Date Jul 2008 Posts 173 [RESOLVED] [Excel]How do i trap a VBA runtime error using Error Handler? Hi Guys, How do i ignore a runtime error (This file has been locked by user name for saving. Please try again later. ) How do i trap a runtime error using error handler to continue without trying to save the file again? Last edited by allankevin; Aug 7th, 2008 at 07:47 AM. "In order to improve the mind, we ought less to learn, than to contemplate." Reply With Quote Aug 7th, 2008,11:16 AM #2 Hack View Profile View Forum Posts Super Moderator Join Date Aug 2001 Location Searching for mendhak Posts 58,335 Re: [Excel]How do i trap a VBA runtime error using Error Handler? Code: Sub Something() On Error GoTo ErrTrap 'your VBA code Exit Sub ErrTrap: 'what you want to happen when an error occurs End Sub Please use [Code]your code goes in here[/Code] tags when posting code. When you have received an answer to your question, please mark it as resolved using the Thread Tools menu. Before posting your question, did you look here? Got a question on Linux? Visit our Linux sister site. I dont answer coding questions via PM or EMail. Please post a thread in the appropriate forum section. Creating A Wizard In VB.NET Paging A Recordset What is wrong with using On Error Resume Next Good Article: Language Enhancements In Visual Basic 2010 Upgrading VB6 Code To VB.NET Microsoft MVP 2005/2006/2007/2008/2009/2010/2011/2012/Defrocked Reply With Quote Aug 7th, 2008,04:47 PM #3 westconn1 View Profile View Forum Posts PowerPoster Join Date Dec 2004 Posts 21,897 Re: [Excel]How do i trap a VBA runtime error using Error Handler? in the error trap, put code to check for a specific error and someother to handle all other errors vb Code: if err.number = xx then 'where xx is the error number you are checking forresume nextmsgbox "error number " & err.