Handling runtime errors

Runtime errors happen when we are actually executing the code. Most of these errors present error messages that users cannot easily understand. This recipe will show how to handle these errors as well as some of the most common errors.

How to do it...

1. Let's create a new codeunit from Object Designer.

2. Then add the following global variables:

   Name	DataType	SubType
   Customer	Record	Customer
   Selection	Integer

3. Write the following code in the OnRun trigger of the codeunit:

   Selection := STRMENU('Show Error,Handle Error', 1);
   IF Selection = 1 THEN
     Customer.GET
   ELSE
     IF NOT Customer.GET THEN
       ERROR('Unable to find a customer with a blank number.'+
             '\Are you sure you have selected a customer?');

4. Save and close the codeunit.

5. On execution of the codeunit, we will see a window with two options, as shown in the following screenshot:

   

How it works...

This codeunit allows you to select between having NAV handle an error for you or handling it with custom code...