Multiple Reasons - During confirmation

Hai PP Gurus,

In REM, during confirmation of actual activities (in MFBF) i want to enter more than one reason.But in std SAP system shows only one reason for variance.Here i couldn't group the reasons also.Becoz i have around 100 reasons.

So pls throw some light on this.

Thanks in advance

Regards,

S.Ganeshraja