Prerequisite check “CheckActiveFilesAndExecutables” failed

Today i was trying to remove the Oracle Patch (21352646) from HOME and Database which was recently applied by me on one of our test instance, however i faced the problem while doing that. ============================================================= [oracle@testdb 21352646]$ $ORACLE_HOME/OPatch/opatch nrollback -idFile $ORACLE_HOME/cpu/CPUOct2015/rollback_all.lst Oracle Interim Patch Installer version Copyright (c) 2015, Oracle Corporation. All rightsContinue reading “Prerequisite check “CheckActiveFilesAndExecutables” failed”