So that the
Database Manager can access the environment variables that it requires on the database server, you must create these explicitly using a
DBM command.
Setting actual environment variables using operating system commands is therefore not applicable.
If only local accesses are made to a Database Manager in a purely Microsoft Windows NT environment, you can use normal Microsoft Windows NT environment variables.
Procedure
You can declare an environment variable or export it directly to the environment.

Even if you have stored multiple values for an environment variable
If one of the environment variables TEMP, TMP, ADINT, ADA_OPT, NSR_ENV, NSR_POOL, NSR_EXPIRE, or BSI_ENV has been stored both with
See also:
Database Manager CLI: SAP DB 7.4 ,
Changing a Database Manager Configuration Parameter section.