The SAVEDS keyword allows the specification of the data structure saved and restored for each device. Before an input operation, the data structure for the device operation is saved. After the input operation, the data structure for the device associated with this current input operation is restored. This data structure cannot be a data area data structure, file information data structure, or program status data structure, and it cannot contain a compile-time array or prerun-time array.
If the SAVEDS keyword is not specified, no saving and restoring is done. SAVEDS must not be specified for shared files.
When you specify SAVEDS but not MAXDEV, the ILE RPG program assumes a multiple device file (MAXDEV with a parameter of *FILE).