The error hander is still active when the second error occurs, and therefore the second error is not trapped by the On Error statement. When the first error is raised, execution transfers to the line following Err1.
#Excel vba on error not working code#
For example, the following code will not work properly: On Error GoTo Err1: You can't use the On Error Goto : statement merely skip over lines. 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. This site has a good description of the problem:Īn error handling block, also called an error handler, is a section of code to which execution is tranferred via a On Error Goto : statement. This clearly delineates error handling from regular code and ensures that the currently executing error handler finishes before you try to set up another handler. That means that subsequent error handlers are not allowed until you resume from the current one.Ī better architecture would be: Dim m圜ol As ListColumn With the code as shown, you're actually still considered to be within the error handling routine when you strike the next statement. To reiterate, the error is thrown on the second round of the loop, at the statement myDate = CDate(m圜ol.Name)Ĭan anyone explain why the On Error statement stops working?
However, when the second column's header is 'assigned' to the date-type variable, the macro encounters an error even though it is within an error-handling block Dim m圜ol As ListColumn Since the first three columns do not have date headers, I have tried to set the loop up so that, if there is an error assigning the header string to the date-type variable, the loop goes straight to the next column To do this I am using a foreach loop on myTable.ListColumns. I want to assign those dates, sequentially, to a Date-type variable, and then perform some operations based on the date The first three columns of this table have text headings, the rest of them have dates as headings. This method is more suitable for exiting the program gracefully if any fatal error occurs during the execution.īelow is a self-explanatory example of ‘On Error Goto:’ where I have used the label name as ‘Error_handler’.I'm trying to cycle through a table in excel. In such cases, all the statements between the exception line and the label will not be executed. This statement tells the VBA to transfer the program control to the line followed by the label, in case any runtime errors are encountered. This is the third form in which VBA On Error statement can be used. And hence we have set ‘N’ to its minimum value so that there are no side effects in the code due to uninitialized variables. Number property, if it is not equal to zero that means there is some exception in the code. The best way to error handle within a Loop is by using On Error Resume Next along with Err.Number to detect if an error has. Now, here in this code, we are checking the Err. N = 2 ' Some minimum value of N if there is some exception in the code. N = 1 / 0 ' Line causing divide by zero exception When an exception occurs, the Err object is updated to include information about that exception.įor example, I have a simple macro as follows: The Err object preserves information about one exception at a time. Err object in VBA comes into the picture whenever any runtime error occurs. This can be ensured by using the VBA Err object.
However, it is the sole responsibility of the programmer to make sure that any handled error should not have any side effects (like uninitialized variables or null objects) on the program execution. On Error Resume Next statement doesn’t fix the runtime errors but it simply means that program execution will continue from the line following the line that caused the error. This statement tells the VBA program to ignore the error and resume the execution with the next line of code. It is the second form of the On Error statement. Help: This button will open Microsoft MSDN help pages for that exception. Debug: This option will bring the program control back to the statement from where the exception has occurred. Continue: This will ignore the exception and continue the code, only if it is possible to do so.Ĭ. This message box will give you four options:Ī. Here we are instructing the program to display the standard runtime message box with ‘Continue’, ‘End’, ‘Debug’, and ‘Help’ buttons.
When On Error Goto 0 is in effect, it is the same as having no error handler in the code.
This is also called VBA default exception handling. Syntax of On Error Statement:īasically, there are three types of On Error statement: The code below shows a simple example of the use of basic error handling. On Error statement instructs VBA Compiler, what to do in case any runtime exception is thrown. Break on All Errors: Stops on every error, even errors following a Resume Next.