The value n determines how the ZALLOCATE (ZA) and ZDEALLOCATE (ZD) commands behave, according to Caché rules or DSM-11 rules:
0 chooses Caché rules, which means that ZA and ZD behave exactly like LOCK + and LOCK -.
1 chooses DSM-11 rules, which means that ZA locks can only be unlocked by ZD and LOCK + locks can only be unlocked by LOCK.
For details, see the section “DSM-11 Language Compatibility” in the “Open M Language Compatibility” chapter of Using Caché ObjectScript.
0 or 1. The default is 0.
On the page System Administration > Configuration > Additional Settings > Compatibility, in the ZaMode row, select Edit. Choose true (selected) or false (cleared).