FocFetch contains the return code of the most recently issued NEXT or MATCH command. If the NEXT or MATCH command returned data, FocFetch is set to zero. Otherwise, it is set to a non-zero value.
It is recommended that you test FocFetch in place of issuing the ON NEXT, ON NONEXT, ON MATCH, and ON NOMATCH commands: FocFetch accomplishes the same thing more efficiently.
FOR ALL NEXT CustID INTO CustOrderStack; IF FocFetch NE 0 THEN ReadFailed();
FocFetch is local to a procedure. If you wish a given FocFetch value to be available to another procedure, you must pass it to that procedure as an argument.