An APM Command Center Server (ACC) upgrade with upgradetool.sh/bat fails with this error message. (The version information may vary according to your environment.):
[ERROR] Upgrade failed: Version of the tool from the package provided is lower than the current one (10.5.2.11 < 10.5.2.8). Downgrades are not supported.
Version comparison is implemented as lexicographical instead of numerical comparison. Therefore “10.5.2.11 < 10.5.2.8” is assumed and the installation aborts.
Override the version to upgrade from by using -Dcom.ca.apm.acc.upgrade.version=10.0.0.0.
This helps by overriding the old version string used for checking.
The steps to do this are below:
1. Open upgradetool.sh/bat with an editor
2. Add a line “-Dcom.ca.apm.acc.upgrade.version=10.0.0.0 \” to the $JAVA_CMD string at the end of the file.
3. Save the file.
4. Verify that the whole command should now read:
-DTAR_PATH="`which tar`" \
-jar /tmp/acc-upgradetool.jar $*
This issue will be fixed in a future version or service pack of CA APM.