BSY959E New configuration makes this column size invalid.

Explanation Fixing the requested columns would shrink the available
area for unfixed columns unacceptably. One or more unfixed columns
would not fit in the remaining unfixed area of the screen. The cursor
is placed on a row that represents one such column. Therefore, the
requested configuration is not allowed. 

User response To change column sizes, cancel out of the CFIX function
and invoke the CSIZE function. Either cancel to exit CFIX with no
change or blank out one or more FIX selections until an allowable
fixed size is reached. 