AcuCobolGT Extend Occurred IO error when I was added Oracle field.

Hello I am take over from retired employee. However succession was not so complete. About two weeks ago, I was add 10 items  to Oracle. Oracle record will be read via AcuCobol  extend XFD fie. So I was modified copy library and compile was complete without error. My understanding , although COBOL language need record size , I don't know  how to set record size. please let me know if you know it. i 'm sorry if this question is basic issue. AcucobolGT with acubench's  version is 4.2(Maybe).    Please I am waiting your kindly advice and if you need more detail information, please let me know.


best regards