Diagnosis
You tried to define a query in which the line width of the generatedlist exceeds 255 characters.
The line width is defined in the Title, Format screen. A maximumvalue of 255 can be defined there. When you define statistics andranking lists, however, this value could be implicitly enlarged sincethe lines of statistics and ranking lists may not be broken. This issuch a case. The implicit extension would result in a list that iswider than 255 characters. This query therefore cannot be executed.

Procedure
Check which statistics or ranking lists are responsible for the listbeing too wide. Change them so that a line width of 255 characters issufficient.