You can change the description of a logical RMSfile with toolkit as follows:
Start toolkit on your database:
c:\> toolkit dbname
Select 1 - Data Files Menu from the Toolkit Development Menu.
Select D3 - Modify Catalog Description from the Data File Menu.
Enter the new description and press STORE <F5>, or press CANCEL <F1>-X to leave the old description unchanged.
You can change the description of a logical RMSfile with the following command:
c:\> lfadmin -uv -C "new comment" lfname
You should enclose your new comment in quotes to prevent the shell from interpreting special characters (e.g., blanks).