Error Goto 0 Visual Basic
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Visual Basic On Error Goto Line
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On Error Goto 0 Vba
a minute: Sign up Difference between 'on error goto 0' and 'on error goto -1' — VBA up vote 20 down vote favorite 9 Can anyone find the difference between 'On error goto -1' and 'on error goto 0' in https://msdn.microsoft.com/en-us/library/ms973849.aspx VBA? I've tried google and msdn, but I've had no luck. excel vba msdn share|improve this question asked Jan 4 '13 at 14:22 sterlingalston 150116 This documentation is for Visual Basic, not VBA, but the concepts are similar enough in this case that it should explain the difference. –vcsjones Jan 4 '13 at 14:30 add a comment| 4 Answers 4 active oldest votes up vote 32 down vote accepted On Error GoTo 0 disables any error trapping currently present in http://stackoverflow.com/questions/14158901/difference-between-on-error-goto-0-and-on-error-goto-1-vba the procedure. On Error GoTo -1 clears the error handling and sets it to nothing which allows you to create another error trap. Example: On Error GoTo -1 After the first error is raised, it will GoTo ErrorFound which will then clear the routine's error handling and set a new one, which will GoTo AnotherErrorFound when an error is found. Sub OnErrorGotoMinusOneTest() On Error GoTo ErrorFound Err.Raise Number:=9999, Description:="Forced Error" Exit Sub ErrorFound: On Error GoTo -1 'Clear the current error handling On Error GoTo AnotherErrorFound 'Set a new one Err.Raise Number:=10000, Description:="Another Forced Error" AnotherErrorFound: 'Code here End Sub Example: On Error GoTo 0 After the first error is raised, you will receive the error as error handling has been disabled. Sub OnErrorGotoZeroTest() On Error GoTo 0 Err.Raise Number:=9999, Description:="Forced Error" End Sub share|improve this answer edited Mar 22 '13 at 10:08 answered Jan 4 '13 at 15:29 Francis Dean 1,40611118 1 +1, good explanation. It is interesting to point out that ONLY On Error Goto -1 will allow further error trapping within error trapping. Infact, even On Error Resume Next will still result in an untrapped error that halts operation. –Daniel Jan 4 '13 at 15:32 Thank you both so much, @Francis Dean and Daniel Cook. I've ended up using this in my code a long time ago, but never knew why I could get it to work after Goto -1. –sterlingalston Jan 4 '13 at
Database Guide User login Username: * Password: * Request new password Home › Tutorials Error handling in Visual Basic Level: Error handling is essential to all professional applications. Any number of run-time errors can occur, and if your program does not trap them, the VB default action http://www.vb6.us/tutorials/error-handling-visual-basic is to report the error and then terminate the program (often resulting in the end user calling you and complaining, "Your program kicked me out!"). By placing error-handling code in your program, you can trap a run-time error, report http://www.herongyang.com/VBScript/Error-Handling-On-Error-GoTo.html it, and let the user continue. Sometimes the user will be able to correct the error and sometimes not, but simply allowing the program to crash is not acceptable. You should generally place error-handling code in any Sub or error goto Function that accesses files or databases. Your code will typically interrogate the Number and Description properties of the built-in VB Err object in an error-handling routine set up with the On Error statement. In this section, we will look at the following statements: On Error GoTo label On Error Resume Next Following is a brief tutorial in error-handling. To perform this tutorial, you should have a floppy disk handy. Also, in the VB IDE, make sure that on error goto the Break on Unhandled Errors option is set under Tools à Options à General. STEPS: 1. Start a new project. 2. Place four command buttons on the form. Name them and set their Captions as follows: Name Caption cmdCrash Crash cmdGoToLabel GoTo Label cmdGoTo0 GoTo 0 cmdResumeNext Resume Next Your form should look something like this: 3. Code the cmdCrash_Click event as follows: Private Sub cmdCrash_Click() Open "A:\JUNK.TXT" For Input As #1 MsgBox "File was opened successfully" Close #1 End Sub 4. Place your floppy disk in the A: drive. Run the program and click the Crash button. Assuming that you do not have a file called "JUNK.TXT" on your A: disk, the program will "bomb" with the code/message "53 – File Not Found". If you don't have a disk in drive A:, the code/message will be "71 – Disk Not Ready". 5. Code the cmdGoToLabel_Click event: Copy and paste the code from the Crash sub, and add statements so that the cmdGoToLabel_Click Sub looks like the following (the new statements are shown in bold): Private Sub cmdGoToLabel_Click() On Error GoTo OpenFileError Open "A:\JUNK.TXT" For Input As #1 MsgBox "File was opened successfully" Close #1 Exit Sub OpenFileError: MsgBox "The following error occured: " & vbNewLine _ & "Error # " & Err.Number & vbNewLine _ & Err.Description, _ vbCritical, _ "Open Error" End Sub 6. Run the progra
a tutorial example on how to use 'On Error GoTo 0' to turn off the error handling flag in a procedure to catch the first runtime error. As you can see from the previous section, my last VBScript example reported the last runtime error, not the first one. If you want to catch the first runtime error is a large section of code, you need to: Enter the "On Error Resume Next" statement in the main code to turn on the error handling flag for the main code. Put that section of code into a new subroutine procedure. Enter the "On Error Goto 0" statement in the new procedure to turn off the error handling flag for that procedure. Check the Err.Number property right after calling that procedure. Here is the modified VBScript example to catch the first runtime error in a section of code:
Run this modified example code in IE, you will get: There is no error at this time. Before statement: x = 1/0 A runtime error has occurred: Err.Number = 11 Err.Description = Division by zero Err.Source = Microsoft VBScript runtime error What heppened was: When the first runtime error occurred on statement, x = 1/0, in the CodeToBeMonitored() procedure, execution stopped for that procedure, because the error handling flag was turned off for that procedure. Execution control was transferred back to the main code with the runtime error. Back in the main code, the execution continued because the error handling flag was turned on for the main code. When CheckError() was called at the end, Err.Number is 11, indicating that the runtime error occur