■ Identifiers must not be longer than 40 characters. This
  includes syntax conventions. For example:
 
              formname.objectname.propertyname
 
  The entire object reference cannot exceed 40 characters.
 
■ Possible solution:
 
  • Verify that your identifier does not exceed 40 characters.
 
■ If you need additional help, move the cursor to a keyword
  and press F1 to open the Help window.