Ms Access Database Error Handling
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soon) Ruby (coming soon) Getting Started Code Samples Resources Patterns and Practices App Registration Tool Events Podcasts Training API Sandbox Videos Documentation Office Add-ins ms access vba error handling example Office Add-in Availability Office Add-ins Changelog Microsoft Graph API Office 365 Connectors vba error handling examples Office 365 REST APIs SharePoint Add-ins Office UI Fabric Submit to the Office Store All Documentation https://www.yammer.com/ ms access error handling best practice http://feeds.feedburner.com/office/fmNx How do I... Miscellaneous Maintenance Maintenance Handle Run-Time Errors in VBA Handle Run-Time Errors in VBA Handle Run-Time Errors in VBA Compact and Repair a Database Recover Tables ms access on error resume next Deleted from a Database Handle Run-Time Errors in VBA TOC Collapse the table of content Expand the 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
Vba Error Handling Best Practices
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 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 pro
user may be left viewing the faulty code in a full version of Access, while a run-time version just crashes. The simplest approach is to display the Access error message and quit the procedure. Each
Access Vba Error Handling Module
procedure, then, will have this format (without the line numbers): 1 Sub|Function SomeName() 2 error handling in access 2013 On Error GoTo Err_SomeName ' Initialize error handling. 3 ' Code to do something here. 4 Exit_SomeName: ' Label to resume error number : -2147217900 vba after error. 5 Exit Sub|Function ' Exit before error handler. 6 Err_SomeName: ' Label to jump to on error. 7 MsgBox Err & " " & Error$ ' Place error handling here. 8 Resume Exit_SomeName https://msdn.microsoft.com/en-us/library/office/ff193267.aspx ' Pick up again and quit. 9 End Sub|Function The labels (lines 4 and 6) must be in the current procedure, and must be unique. For a task where several things could go wrong, replace lines 7~8 with more detail: Select Case Err Case 9999 ' Whatever number you anticipate. Resume Next ' Use this to just ignore the line. Resume Exit_SomeName ' Use this to give up on the proc. http://allenbrowne.com/ser-23b.html Case Else ' Any unexpected error. Call LogError(Err, Error$, "SomeName()") Resume Exit_SomeName End Select The Case Else in this example calls a custom procedure to write the error details to a table. This allows you to review the details after the error has been cleared. The table might be named "tLogError" and consist of: Field Name Data Type Description ErrorLogID AutoNumber Primary Key ErrNumber Number Integer. The Access-generated error number. ErrDescription Text Size=255. The Access-generated error message. ErrDate Date/Time System Date and Time of error. Default: =Now() CallingProc Text Name of procedure that called LogError() UserName Text Name of User. Below is the procedure for writing to this table. If you wish to go further, you could extend it to count errors recorded recently and suppress the display of the same message repeatedly, or give up retrying locking errors. Sub LogError (ByVal iErrNumber As Integer, ByVal strErrDescription As String, strCallingProc As String) On Error GoTo Err_LogError ' Purpose: Generic error handler. ' Logs errors to table "tLogError". ' Arguments: iErrNumber - value of Err ' strErrDescription - value of Error$ ' strCallingProc - name of sub|function that generated the error. ' Author: Allen Browne, allen@allenbrowne.com, June 1997. Dim NL As String * 2 ' New Line Dim sMsg As S
GUI Design GUI Design Examples Submit Your Examples Resources Resources Database News Knowledge Base Microsoft Access Products, Tools & Add-In's Online Shop UK Visitors US http://www.databasedev.co.uk/error-handling.html Visitors Info Contact Us Advertise With Us Link To Us Write For Us Competitions Microsoft Access VBA Error Handling In Microsoft Access Error handling routines are very powerful tools in Microsoft Access if they are used correctly. Surprisingly though, errors and their properties are relatively unknown to a large part of the development community. To effectively error handling implement error handling in your applications, it is necessary to know the resources that are available when your program encounters an error. Assuming we are working with non-executable programs (.mdb's or .accdb's), the most important thing to understand is the global settings for error trapping in our VBA procedure. Under the "Tools » Options" menu, then vba error handling on the "General" Tab there are three options for error trapping: Break on all errors » Stops code execution when an error is encountered. Break in class module » Stops code execution in class modules only. Break on unhandled errors » Stops code execution only if there is no error handling routine present in the procedure. This is the global setting for error handling. So, if error traps are present in our procedures, they will be ignored if we have specified the "Break on all errors" option. In the following image, we've done just that: There are three important statements in an error handling routine: On Error, Resume and GoTo. Typically, they will appear together at the beginning of a procedure: On Error Resume Next On Error GoTo 0 The "Resume" and "GoTo" statements simply tell VBA what to do when an error is encountered. First, Resume has two primary actions associated with it: Resume Next » Ignores the encountered error and continues execution with the next