Non-Fatal Errors: Creating Usable, Effective Error Messages  

'Memory requests for some applications may be denied.' 'Error 404: File not found.' 'Invalid entry. Check your info and resubmit.' 'Fatal error. Procedure aborted.' It's often easy to identify what kinds of error messages don't help users, but it can be tricky to avoid them, and even more of a challenge to create the opposite: error messages that give users a clear indication of the problem, offer information to help them fix it, and provide tips on how to avoid the same situation in the future. This paper details the steps involved in creating understandable, helpful error messages, and suggests ways of communicating the value of good error messages to managers and executives.

Wilska, Emily. STC Proceedings (2004). Articles>Documentation>Help>Online

Non-Fatal Errors: Creating Usable, Effective Error Messages

It's often easy to identify what kinds of error messages don't help users, but it can be tricky to avoid them, and even more of a challenge to create the opposite: error messages that give users a clear indication of the problem, offer information to help them fix it, and provide tips on how to avoid the same situation in the future. This paper details the steps involved in creating understandable, helpful error messages, and suggests ways of communicating the value of good error messages to managers and executives.

Wilska, Emily. WritersUA (2004). Articles>Documentation>User Centered Design>Online