Error on input file - not MF indexed or variable format

From: som (soumendra.patnayak_at_rave-tech.com)
Date: 11/25/04 

Date: Thu, 25 Nov 2004 03:53:14 -0500

Hi,

I wanted to create a rebuild program by the help of rebuild utility .My
environment is MF-COBOL with SCO UNIX.When i am trying to create for a
file named as FDweh with this command "rebuild FDweh > rbweh.cbl" , it is
giving the above error.

Please suggest some solution to this.

Thanks,
Regards
 Som