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They are normally outside of your control but can be caused by errors in your code.For example, imagine your application reads from an external workbook.
The application requires user intervention with the code before it can continue. In the following code, we have not used any On Error line so VBA will use the On Error Goto 0 behavior by default.I have an in-depth post about using VBA assertions – see How to Make Your Code Bullet Proof.As we have seen there are two ways to treat runtime errors Let’s look at each of these statements in turn. In other words, if you don’t use On Error then this is the behavior you will see.These errors cannot be dealt with using error handling as they obviously won’t generate any error.You can deal with these errors using Unit Testing and Assertions.This post provides a complete guide to VBA Error Handing.
If you are looking for a quick summary then check out the quick guide table in the first section.
To understand error handling we must first understand the different types of errors in VBA.
There are three types of errors in VBA We use error handling to deal with runtime errors.
If you are looking for a particular topic on VBA Error Handing then check out the table of contents below(if it’s not visible click on the post header).
If you are new to VBA Error Handling, then you can read the post from start to finish as it is laid out in logical order.
If this file gets deleted then VBA will display an error when your code tries to open it.