Raising custom error messages in custom WebADI template

In order to raise a custom error message using your custom WebADI
integrator, I did the following:

1. Registered/Created a custom error message in the fnd_new_messages.

2. In the package which has been registered for the WebADI integrator i created a common error handling procedure which will be called on errors.

3. The definition of the error handling procedure looks like this :

Spec : Error_handler(p_error_code,p_error_msg)
Body :
fnd_message.set_name ('ABC ', p_error_code);
fnd_message.set_token ('TOKEN', p_error_msg);
fnd_message.raise_error;

4. Call this error handler on the errors and you will be able to see the error code and error message on the template.