company code upload data error in lsmw

Dear Friends,

I am uploading Company code data.

Now while uploading GL company code data through LSMW i am getting error.

Example -  Cursor field GLACCOUNT_SCREEN_CCODE-XGKON. does not exist in the screen

But field ' relevant to cash flow' is sometimes suppressed.

But its not mandatory. Out of say 100 data records; say 90 of them have no value for this. Even when i pass no value in text upload file why error comes because this field is suppressed but not mandatory?