SQL ERROR MESSAGE - BEST PRACTICE

Hello Colleagues,

What would you say is the 'best practice' idea for displaying server errors in production? I have 2 scenarios:

AERROR(laError)
MessageBox('Database '+laError[1,2],'Server error')

or

MessageBox('File read/connection error. Server request has been denied',16,'Server error')

In the first option, if a client calls about an error I can see exactly what the problem is and what's causing it but in the second option its not so easy to tell. If I go with the first option, would this be displaying too much info. for the client?

Regards,

Patrick