The Resume Statement The Resume statement directs execution back to the body of the procedure from within an error-handling routine. It also increases the chance that future developers can understand your work to fix or enhance it. (20 printed pages)Luke Chung, President of FMS, Inc.August 2009Applies to: Microsoft Office Access 2007ContentsIntroduction To determine the descriptive string associated with an Access error, an ADO error, or a DAO error that has not actually occurred, use the AccessError method. This causes code execution to resume at a line label. http://integerwireless.com/access-vba/access-vba-error.php
However, it does not give you complete information about Access errors or Access database engine errors. By using a consistent error handler, you can make sure that when crashes occur, the user is properly informed and your program exits gracefully. That is, we consider it okay if the object could not be found. VB Copy Public Sub OnErrorDemo() On Error GoTo ErrorHandler ' Enable error-handling routine.
Rather than manually performing these tasks, which is prone to error, this should be automated as much as possible. The distinction is important. Basically they involve adding an: On Error GoTo ErrorHandler to the top of each proc and at the end they put an: ErrorHandler: Call MyErrorhandler Err.Number, Err.Description, Err.LineNumber label with usually
VB Copy Sub AdvancedErrorStructure() ' Use a call stack and global error handler If gcfHandleErrors Then On Error GoTo PROC_ERR PushCallStack "AdvancedErrorStructure" ' << Your code here >> PROC_EXIT: PopCallStack Exit When you're ready to enable error handling, simply reset the constant to True. End Select Resume Next ' Resume execution at same line ' that caused the error. Access Vba On Error Resume Next However, you cannot use the Raise method to generate an Access error, an ADO error, or a DAO error.
Once an error is handled by an error handler in any procedure, execution resumes in the current procedure at the point designated by the Resume statement.Note An error-handling routine is not Access Vba On Error Goto Next When the debugger encounters an error, one of two things happens: If there's no error-handling routine, the debugger stops at the offending line of code, which can be convenient. The Access-generated error number. For example, suppose Procedure C has an enabled error handler, but the error handler does not correct for the error that has occurred.
This is extremely powerful and quite amazing when you think about it. Access Vba On Error Goto Not Working 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. Without an On Error GoTo -1 statement, an exception is automatically disabled when a procedure is exited.To prevent error-handling code from running when no error has occurred, place an Exit Sub, You can track variables across modules and procedures and keep them in your Watch Window to see their value no matter where the current line is.
Typical run time errors include attempting to access a non-existent worksheet or workbook, or attempting to divide by zero. Your feedback about this content is important.Let us know what you think. Access Vba On Error Goto This allows you to skip a section of code if an error occurs. Access Vba On Error Goto 0 For example, if you add the following code, the debugger stops when x is 5.
Simply move your cursor over variables to see their current values. More about the author You can use the Err object inside conditional statements as well, which are generally used to force users to make appropriate changes. We appreciate your feedback. Luke is a popular speaker at conferences in the US and Europe, and has published many articles in industry magazines. Access Vba On Error Msgbox
On Error GoTo ErrHandler: N = 1 / 0 Debug.Print N Exit Sub ErrHandler: N = 1 ' go back to the line following the The Err Object This is actually quite complex, but for the purposes of this article, we will assume that the Err object only deals with the current error in a procedure. Are we talking about building an automated error reporting system working with VBA? check my blog It prevents the code of error handler from being executed every time.
If the code causing the error is in a procedure with an On Error statement, error handling is as described in the above section. Access Vba On Error Resume Figure A Choose the most appropriate error-handling setting. A Note Of Caution It is tempting to deal with errors by placing anOn Error Resume Next statement at the top of the procedure in order to get the code to
This code should be designed either to fix the problem and resume execution in the main code block or to terminate execution of the procedure. VB Copy If x = 5 Then Stop Stop statements are rare but some developers like to add it to the end of Select Case statements for what should be an This section will reveal how your error handler can document the following:The procedure name where the error occurred.The procedure call stack to see how the procedure was invoked.The line number where Access Vba On Error Continue ErrDescription Text Size=255.
Let's look at each individually: Active Error Handlers One handler is initialized and enabled as soon as the "On Error" statement is encountered. All the Error objects associated with a particular ADO or DAO operation are stored in the Errors collection, the lowest-level error being the first object in the collection and the highest-level This is particularly important as the code gets more complex.Debugging doesn’t end when the application is shipped. news The Return Value serves only to indicate if the function succeeded in logging the error.
Exit_MayCauseAnError: Exit Function Error_MayCauseAnError: ' Check Err object properties. It does not specify line 0 as the start of the error-handling code, even if the procedure contains a line numbered 0.