BSY994E Invalid row number.

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 valid parameter count for use with CEXPAND. 