With Visual COBOL for Visual Studio there is a sample solution called RMMFMigration. This solution assists in the conversion of RM/COBOL data files to the Micro Focus Visual COBOL data file format.
Converting RM/COBOL data files to Micro Focus Visual COBOL Format is a two step process. The data file is first converted to an intermediate variable length sequential file by a conversion routine (ixconvert.cob) and is then passed to a Visual COBOL application (rebuild.exe) to convert the intermediate file into a Micro Focus Visual COBOL index file.
However this isn't an Eclipse version of this solution.
The RMMFMigration project is really just a front end that then calls ixconvert that does the real work. Ixconvert is an RM/COBOL object and can be run using ‘runcobol’. It will produce a Micro Focus binary sequential file and will return several pieces of information to the caller including the key expression string that would be used in the Micro Focus rebuild tool to create an indexed file using the /K parameter.