ORA-07217: sltln: environment variable cannot be evaluated.
Cause:
Due to lack of permission on home directory , rman cannot read the data of backuppiece
RMAN> catalog start with '/home/oracle';
using target database control file instead of recovery catalog
searching for all files that match the pattern /home/oracle
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of catalog command at 06/21/2021 21:09:46
ORA-07217: sltln: environment variable cannot be evaluated.
Environment variables are properly set but still error arise due to directory permission miss
[oracle@orcldg u01]$ oerr ora 07217
07217, 00000, "sltln: environment variable cannot be evaluated."
// *Cause: getenv call returned a null pointer.
// *Action: Set the environment variable and try again.
Owner of home directory is ‘root’
[oracle@orcldg /]$ ls -lrt |grep home
drwxr-xr-x. 4 root root 4096 Feb 4 2020 home
Workaround:
Either move the backup pieces to new directory or mount point with oracle permissions
[oracle@orcldg oracle]$ mv n* databkup/RMAN can read the directory with oracle permissions
[oracle@orcldg oracle]$ rman target /
Recovery Manager: Release 12.1.0.2.0 - Production on Mon Jun 21 21:32:28 2021
Copyright (c) 1982, 2014, Oracle and/or its affiliates. All rights reserved.
connected to target database: ORCL (DBID=1559282684, not open)
RMAN> catalog start with '/oracle/databkup';
using target database control file instead of recovery catalog
searching for all files that match the pattern /oracle/databkup
List of Files Unknown to the Database
=====================================
File Name: /oracle/databkup/nnndf0_TAG20210620T005353_0.330.1075683605
File Name: /oracle/databkup/nnndf0_TAG20210620T005353_0.287.1075683685
File Name: /oracle/databkup/nnndf0_TAG20210620T005353_0.530.1075683509
File Name: /oracle/databkup/nnndf0_TAG20210620T005353_0.461.1075683233
File Name: /oracle/databkup/nnndf0_TAG20210620T005353_0.540.1075683661
Do you really want to catalog the above files (enter YES or NO)? yes
cataloging files...
cataloging done
List of Cataloged Files
=======================
File Name: /oracle/databkup/nnndf0_TAG20210620T005353_0.330.1075683605
File Name: /oracle/databkup/nnndf0_TAG20210620T005353_0.287.1075683685
File Name: /oracle/databkup/nnndf0_TAG20210620T005353_0.530.1075683509
File Name: /oracle/databkup/nnndf0_TAG20210620T005353_0.461.1075683233
File Name: /oracle/databkup/nnndf0_TAG20210620T005353_0.540.1075683661
If security or permissions are not concern, then grant ownership to oracle user to /home directory
[oracle@orcldg /]$ chown -R oracle:dba /home/