NetBackup 5220 2.5 Update to 2.5.2,Error:Failed to check prerequisites .
NBU App 5220 Version:2.5
nbu5220.Software> listList verList Version
Appliance Version: 2.5
NetBackup Version: 18.104.22.168
Build Date: 20120510
nbu5220.Software> Install SYMC_NBAPP_update-2.5.2-1.x86_64.rpm
- [Info] Checking prerequisites before installing SYMC_NBAPP_update-2.5.2-1.x86_64.rpm
Checking the update 'SYMC_NBAPP_update-2.5.2-1.x86_64.rpm' ... ok
Checking version of local appliance ... 2.5
Comparing appliance version with update version '2.5.2' ... ok
Extracting the contents of the update ... ok
Running self-test to confirm appliance configuration ...
Running Sanity tests on Master Appliance.
Checking if installation is successful ... [OK]
Checking if SSH is enabled ... [OK]
Checking if hostname is set ... [OK]
Checking if IP address is set ... [OK]
Checking if appliance user accounts exists ... [OK]
Checking if required packages are installed ... [OK]
Checking if NetBackup is configured and running ... [OK]
Checking if storage units and diskpools have been created ... [OK]
Checking if SLPs have been created ... [NA]
Checking if required NetBackup policies have been created ... [NA]
Checking if Web Server is configured and running ... [OK]
Checking test backup and restore operations ... [OK]
Expiring test backup images and deleting test policy ... [OK]
Completed running tests on the appliance.
SELF TEST RESULT : [PASS]
Result of self-test to confirm appliance configuration ... ok
Checking for active NetBackup jobs ... - [Info] NetBackup jobs are currently in progress. Stop all NetBackup jobs and then try the install again.
- [Error] Failed to check prerequisites for SYMC_NBAPP_update-2.5.2-1.x86_64.rpm
how can i find the error log info: "Failed to check prerequisites "?