FEC998E Zero parameter invalid.
Explanation
CEXPAND was issued with an invalid parameter
of zero. CEXPAND can be issued with no parameters and the cursor
on a data field, or with two parameters. The two parameters are
the row number, followed by the column number of the data element
to be expanded. The row number is counted down from the top, starting
with the first scrollable row (heading not counted) The column number
is counted from left to right, starting with the left column in
the current display window.
User response
Specify a non-zero parameter.