LFILE - Logical System File Definition

This Natural profile parameter specifies information concerning the physical database file to be associated with a logical system file for Software AG products.

Possible settings See LFILE Parameter Syntax.
Default setting none  
Dynamic specification yes  
Specification within session no  
Application programming interface USR0011N See SYSEXT - Natural Application Programming Interfaces in the Utilities documentation.
USR2004N (recommended)


  • LFILE can be used for Software AG products which have their own system files (for example, Con-nect, Natural Review) to specify where such a system file is to be located. Such products use the database ID 255 and a logical file number in their data definition modules (DDMs). With the LFILE parameter, you specify which physical file number and database ID (and, if applicable, password and cipher key) are associated with that logical file number. Natural maps the logical file number to the physical file number and database ID and uses it for any database calls.

The following topics are covered below:

LFILE Parameter Syntax

The LFILE parameter is specified as follows:



Syntax Element Value Explanation
logical-fnr 1 - 251 Logical file number. This parameter is mandatory.
physical-dbid 0 - 65535, except 255 Physical database ID. Database ID 255 is reserved for logical system files for Software AG products.
physical-fnr 1 - 5000 Physical file number.
password 1 - 8 characters. Password and cipher key are only required if the database file has been password-protected and/or ciphered using the Adabas security feature. With FDDM, FNAT and FUSER, the password and the cipher key are reserved for future use; currently they are ignored.
cipher-key 1 - 8 numerical digits.

To define different logical files, the LFILE parameter must be specified multiple times (separated by a comma or a blank); see Example of LFILE Parameter.

Example of LFILE Parameter