Activating the External File Mapper

To use the External File Mapper, you must:

• Link your program with the shared run-time system
• Create a valid mapper file

Then, to activate the External File Mapper you must set the run-time system tunable environment_mapper to TRUE. You do this by adding the following line:

set environment_mapper=TRUE

to a configuration file pointed to by the COBCONFIG_ environment variable.

For more information on run-time tunables, see the topic Run-time Tunables.