Please enter a number between 0 and 32767

This message has the following cause and solution:

• You have not entered a number of context lines between 0 and 32767.

  Context lines are the lines immediately preceding and following a difference. Showing these lines in a difference display helps you understand the context of the change or difference. If you have checked the Show Context box in the Advanced options of the Show Difference command, you need to specify the number of preceding and following lines to show.