Error handling is one of the most critical aspects of writing stable and maintainable code. Among the many approaches developers use, "On Error Resume Next" remains one of the most widely discussed — and often misunderstood — techniques, especially in languages like VBA (Visual Basic for Applications) and classic VB.
While this statement can help prevent programs from crashing, it can also introduce hidden bugs if used incorrectly. In this comprehensive guide, we’ll break down exactly what On Error Resume Next does, when to use it, when to avoid it, and how to implement it safely. Whether you're a beginner or an experienced developer, this guide will help you master error handling strategies.
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On Error Resume Next is an error-handling statement used in VBA and Visual Basic that tells the program to continue executing the next line of code when a runtime error occurs instead of stopping execution.
In simple terms, it allows your program to “ignore” errors temporarily and keep running.
On Error Resume Next
| Feature | Description |
|---|---|
| Error Handling Type | Inline / Silent |
| Execution Behavior | Continues after error |
| Risk Level | High if misused |
This approach is commonly used in automation scripts, Excel macros, and legacy applications.
Use On Error Resume Next only for small, controlled sections of code. Never apply it globally across an entire procedure.
When the statement is executed, VBA enters a mode where it ignores runtime errors. Instead of halting execution, the program simply moves to the next line.
On Error Resume Next Dim result As Integer result = 10 / 0 MsgBox "Execution continues"
Normally, dividing by zero would cause an error. However, with this statement, the program skips the error and continues execution.
To use this safely, you must check the Err object:
If Err.Number <> 0 Then
MsgBox "Error occurred: " & Err.Description
Err.Clear
End If
| Property | Description |
|---|---|
| Err.Number | Error code |
| Err.Description | Error message |
| Err.Clear | Resets error state |
Many developers forget to check the Err object, which leads to silent failures and hard-to-debug issues.
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Despite its risks, this statement can be extremely useful in specific scenarios.
On Error Resume Next
Set obj = Worksheets("Sheet1")
If obj Is Nothing Then
MsgBox "Sheet does not exist"
End If
On Error GoTo 0
Wrap risky operations in isolated procedures to minimize the impact of suppressed errors.
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There are many situations where using this statement can cause more harm than good.
Suppressing errors means:
| Scenario | Recommendation |
|---|---|
| Critical operations | Use structured error handling |
| Simple checks | On Error Resume Next acceptable |
| Large applications | Avoid completely |
Using On Error Resume Next as a “quick fix” instead of solving the root problem.
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On Error Resume Next
Open "test.txt" For Input As #1
If Err.Number <> 0 Then
MsgBox "File not found"
End If
Err.Clear
On Error Resume Next
Range("A1").Value = 100
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Combine error handling with logging systems for better traceability.
Instead of relying heavily on On Error Resume Next, consider safer alternatives.
On Error GoTo ErrorHandler ' Code here Exit Sub ErrorHandler: MsgBox "Error: " & Err.Description
This method provides better control and debugging capabilities.
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Failing to reset error handling using On Error GoTo 0.
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It tells the program to continue execution after encountering an error.
Only in controlled scenarios with proper error checking.
Structured error handling using On Error GoTo.
Yes, if errors are not properly handled.
Yes, but with caution and understanding.
Use On Error GoTo 0.
VBA, Excel macros, and legacy systems.
Practice structured approaches and consult experts.
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