Microsoft Access Tips: Handling Errors in VBA

A tangle of errors means predicting, searching for, and also correcting programming errors. Even if every effort has been made to reduce errors, there will always be errors in the service. Many programming languages ​​provide error obfuscation facilities for such situations.

Error detection refers to the prediction, detection and correction of software errors. Even if you do your best to significantly reduce the number of mistakes, there will be times when mistakes are made in preparation. Many programming languages ​​provide error detection functions for such situations.

Contributed by: Luke Chang, FMS President

Professional applications must contain errors to detect unexpected errors. With a continuous error handler, you can log
Make sure the carrier is properly informed in the event of a fall and that your technique ends up running smoothly. Basic error handling just hides the default behavior plus one
ends the program. Advanced error handling could potentially include all sorts of features, such as storing information about the cause of the error and the local weather.
when trying to localize the problem and information for the current user about what he needs to do next.

Check Error Handling Settings

Before the client can use the handle, you must understand the error
setting the melody of the call “Catching errors”. VB6/VBA leaves you as is to clarify
behave when errors occur frequently. In the Look (ide) module editor in the Tools Options.Safe

parameter

Make-Error-Trapping is not aChoice of “Break On All” functions.
Error”. This option also causes the code to positively stop on any error.
Errors that you handle correctly and that say “Continue on error.” On

“remove unhandled errors” works in most cases, but is considered possible
problematic when debugging class modules. During development, if Error
The hook is set to “Break on Unhandled Errors” in addition to where the error occurs.
class is the newest module, the debugger will stop when you see the line calling the class, not what
college offensive line. This makes finding and solving our own problem a real challenge.

It is highly recommended that you enable the “Stop Using Course Modules” option.
the actual line of the accident. However, please note that this will never work if you
Use problem reporting in your classes with the Err.Raise command. This order
actually adds an “error” and makes your program crash when error trapping is enabled
defined to allowSpeak them “extract class modules”.

How do I debug Microsoft Access?

Check the value of a variable against its current state.
Enter the VBA code in the Immediate window to see some results.
Run each line of code separately.
Continue executing the main code.
Stop code execution.

Unfortunately, users can easily change this setting beforehand.
If you’re running your company’s app, you’ll need to make sure it’s installed correctly when you launch the app.

Option settings can be viewed and changed programmatically, often using the Application.GetOption and Application.SetOption methods.


GetErrorTrappingOption() function as a string
StrSetting dim As String
A
Select case Application.GetOption(“Catch Errors”)
case 0
StrSetting is “Pause on all errors”.
Case 1
StrSetting = “Break in class modules”
case 2
StrSetting = “Pause on unhandled errors”
exit selection

GetErrorTrappingOption=StrSetting

output function


Sub SwitchErrorHandling (completed as boolean)
“Copyright (c) FMS, Inc.
‘ Feedback: set or reset error handlers
ha This must be called at the beginning and at the end of the method.
‘ However avoids problems when the user called Break On All Errors
In case of an error, repeat the following code, which does not work.
i Parameters: fInit TRUE for setting parameter, FALSE only for resetand to factory settings.

Const cstrOptionErrorTrapping As String = Trapping”
“Error Const cintBreakInClassModules As Integer = 1

Static intErrorTrapping as integer
Static StrSet as string

if finished then
strSet is equal to cstrOptionErrorTrapping
intErrorTrapping means Application.GetOption(cstrOptionErrorTrapping)
Application.SetOption cstrOptionErrorTrapping, cintBreakInClassModules
different
‘ Do not set up an error trap if the static variable has been reset.
i This avoids accidental reset directly in the event of errors.
all If strSet = cstrOptionErrorTrapping Then
Application.SetOption cstrOptionErrorTrapping, intErrorTrapping
finish when
end if

bottom includes trim

Always code in your startup routines to set an appropriate error handling point. At the beginning of the application, call:


SwitchError Handling your true

When the program is finished, reset it to its original settings with:


SwitchErrorHandlingFalse

Microsoft Access Tips For Serious Users

How do I fix Microsoft Access error?

Restoring from a previous backup.
Use compact and repair database.
Use the Microsoft Jet Compact utility.
Create a new MS Access database and import some corrupted files.
Use the repair program.

How do I fix Microsoft Access error?

Restoring from a previous backup.
Use compact and repair database.
Use the Microsoft Jet Compact utility.
Create a new MS Access database and import the most damaged files.
Use a repair program.

Each function or subfunction must include error handling. Without it, the user would have
Full version and Access ruler may not display correctly on startup
version only problems. A For a more detailed approach to error handling, see
Element Error
Management and Debugging
.

The basic approach is to display an Steps To Resolve The MS Access 2007 Error Trap – Webmondo error message and stop the operation. Each procedure has the following process format (no line numbers):

How do I debug Microsoft Access?

Check the value of a variable against its current state.
Enter the VBA code of the immediate window to see the results.
Run each line of code separately.
Keep running each of our codes.
Stop code execution.

1 Sub|SomeName() function
2 On error GoTo Err_SomeName
3
4 Exit_SomeName:
5 Exit sub|function
6 Err_SomeName:
7 MsgBox Error number and error description
8 Continue Exit_SomeName
9 Sub|Exit function

For a real problem where several things could go wrong, lines 7-8 have been replaced with more details:

 Select case error number
      Case 9999
          Next continue
      Case 999
          Continue Exit_SomeName
      opposite case
          Call LogError(Err.Number, Err.Description, "SomeName()")
          Continue Exit_SomeName
      End selection

How do you use Onerror in VBA?

Use “On Error Go [Label]” at the beginning of the code.
Use the “Resume on Error” command ONLY if you are sure of possible errors.
When using error handlers, make sure you can use Exit Sub before the handlers.

The else case in this example indicates that the user-defined function writes this error information to a table. So you can check for problems after fixing the bugbki. The table may be named “tLogError” and consist of readabilitydatatable=”1″>
author:

How do you use Onerror in VBA?

Use “On Error Go [Label]” at the beginning of the code.
Use the Resume on Error command ONLY if you are sure that you have information about the errors that may occur.
When creating error handlers, make sure you can use Exit Sub before the specific handler.

field name Data type Description
Error log ID Auto numbering Primary key.
Error number Number