error message

[mentorman]

Hi folks! just another unknown error message appearing. I run a local monthly online magazine and the sit somewhere has picked up an error message which appears every time I open it on the computer. It then disappears without seemingly causing any problems. As it only appears on this particular issue it must be something in that one. As I normally copy the last issue, add and amend it as the next issue the error is present in the subsequent copy. Short of re-doing the next issue completely anyone able to indicate what it refers to and how I can track it down and cure it?

Thanks as ever, in advance

Ken