This pertains to the Classic Mode in version 6 and to version 5 of Commercial-Industrial Development.
Cell H197 (Classic Mode, version 6) or cell H204 (version 5) on the Development worksheet asks for the term of the development loan. Your entry here should be the number of months that it will take to complete the development of the project. Note that the development loan is an interest only loan so you are not entering an amortization term in this cell.