Tested with (version): wallaby-0.10.4-1 # wallaby modify-feature nonexist Console Connection Established... warning: feature nonexist does not exist # echo $? 1 # wallaby show-param nonexist Console Connection Established... warning: parameter nonexist does not exist # echo $? 1 # wallaby remove-param nonexist Console Connection Established... warning: parameter nonexist does not exist # echo $? 1 Tested on: RHEL5 i386,x86_64 - passed >>> VERIFIED