Fixed an error message [skip CI]
Fixed an error message [skip CI]


Former-commit-id: 0374309489b9fadcdb22a1045bd045f6018ccd2a [formerly b5d6e3a4c23ef242f4bd573155b0063f37809b16]
Former-commit-id: 0ff75f51a0c44f9500ea96a6ef538d383088c164
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine