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To generate a run-time error in your code, use the Raise method.The properties of the Err object are reset to zero or zero-length strings ("") after an Exit Sub, Exit Function, This property works along with the Number property holding the message corresponding to the Number property. Check the spelling of the file name, and verify that the file location is correct. But it does address this part: now I don't want to lose the comfortableness of the default handler which also point me to the exact line where the error has occured.

Of course, running a procedure this way only works if you donít have to pass parameters to it. To display the Immediate window, on the main menu of Microsoft Visual Basic, you can click View -> Immediate Window. But you can still step into and through the sub-procedure, using F8 until it errors out again. Needs to be called at the beginning of each procedure: Sub PushCallStack(strProcName As String) ' Comments: Add the current procedure name to the Call Stack. ' Should be called whenever a

VB Copy Dim Msg As String  ' If an error occurs, construct an error message.  On Error Resume Next ' Defer error handling. With the proper error handling methodology and delivery preparation with line numbers, you can also debug and fix errors in deployed applications. Creating a procedure call stack Unfortunately, while VB6/VBA tracks the procedure call stack and lets you examine it under the View, Call Stack menu item while debugging, this information is not Fortunately, during the testing phase, you may encounter some of the errors so you can fix them before distributing your application.

Watch Window The Watch Window is similar to the Locals Window, but you specify the variables you want to track. Some other errors may not occur even if you test your application. Break When Value Is True This stops the debugger on the line immediately after the value of the variable/expression becomes True. General Declarations The declarations section should define some variables used by the routines ' Current pointer to the array element of the call stack Private mintStackPointer As Integer ' Array of

It is very important to remember that On Error Resume Next does not in any way "fix" the error. For instance, if you are passing variables that get assigned values, that canít be done from the Immediate Window. Unfortunately, users can modify this setting before launching your application so you should make sure this is properly set when your application starts. At runtime the Err.description is "'thisworkbook.xls'" could not be found" etc., but the description attached to err no 1004 is "Application-defined or object-defined error".

You can make the error messages more user friendly by modifying the last part of the macro as follows: InvalidValue: Select Case Err.Number Case Is = 5 MsgBox "Can't calculate square Write some code to take care of these chores, and run it when you make a new build. Share Share this post on Digg Del.icio.us Technorati Twitter Reply With Quote Oct 2nd, 2003,08:40 AM #5 Mudface MrExcel MVP Join Date Feb 2002 Location Sunny, spring-like Hull Posts 3,339 Re: Here is an example: Private Sub cmdCalculate_Click() On Error GoTo 0 Dim HourlySalary As Double, WeeklyTime As Double Dim WeeklySalary As Double HourlySalary = CDbl(txtHourlySalary) WeeklyTime = CDbl(txtWeeklyTime) WeeklySalary = HourlySalary

This is the skeleton code for a simple way: Sub your_macro_name() ' ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ On Error Goto ErrorHandler your macro code here ProcedureDone: Exit Sub ErrorHandler: MsgBox Err.Number & ": On Error Resume Next effectively disables error handling from that line forward (within the procedure) and should be used with care. In the event of an error, the On Error Goto ErrorHandler statement instructs the macro to stop executing your code at the point at which the error occurs and to pick Dim strError As String Dim lngError As Long Dim intErl As Integer Dim strMsg As String ' Variables to preserve error information strError = Err.Description lngError = Err.Number intErl = Erl

Without paying attention, after distributing your application, the user's computer may not have an E: drive and, when trying to display the pictures, the application may crash. Advanced Error Handling The error handling examples shown so far only manage errors in the current procedure. Practical Learning:Introducing Error Handling Open the Georgetown Dry Cleaning Services1 spreadsheet and click the Employees tab Click the Payroll tab Click the TimeSheet tab To save the workbook and prepare The alternative is to create your own message in the language you easily understand, as we did earlier.

Some of the tricks are general programming styles and conventions, while others are specific to the characteristics of Visual Basic (VB6) and Microsoft Office/Access VBA. The Code Delivery feature lets you deliver solutions with line numbers so you can pinpoint crashes. Total Visual SourceBook offers lots of professionally written, tested, and documented code that you can use royalty-free. Languages like C++ provide a code structure call Try/Catch that allows much more granularity and control.

For example, the following code will not work properly: On Error GoTo Err1: Debug.Print 1 / 0 ' more code Err1: On Error GoTo Err2: Debug.Print To start that section, you create a label. This can be a real time saver if the code you are testing is buried deep in a process and you donít want to run the whole program to get there. The handler below checks agains each error type and if none are a match it returns error resume to normal VBA ie GoTo 0 and resumes the code which then tries

You can then display the necessary message to the user. UPDATE heap table -> Deadlocks on RID Is there a place in academia for someone who compulsively solves every problem on their own? Clearing the Error Object There may be situations where you test for an error number but cannot be sure the Err object doesnít already contain an error. 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

Here is an example: Private Sub cmdCalculate_Click() ThereWasBadCalculation: MsgBox "There was a problem when performing the calculation" End Sub If you simply create a label and its message like this, its On Error Goto ErrHandler: N = 1 / 0 ' cause an error ' ' more code ' Exit Sub ErrHandler: ' error handling You can use the Immediate Window whether your code is running or not. You don't have to declare a variable for this class.

Youíll jump directly to it. Join them; it only takes a minute: Sign up VBA: How to display an error message just like the standard error message which has a “Debug” button? Run the Current Procedure Highlight the procedure you want to run and press [F5] to run it. CurrentRow = CurrentRow + 1 ' ...

Supporting Deployed Applications By including a consistent error handler design with a central error handler, you can deploy applications that document the crashes your users encounter. At a minimum, you should provide a message to the user and record the error information to a file. FMS offers many of the leading tools in this area. a current variable value) Run code For items that return a value, use a question mark followed by the expression.