Updated the error message [skip CI]
Updated the error message [skip CI]


Former-commit-id: ed311cc8a4eb84c33c84f25e7b9534cc43ca9724 [formerly 909db44ddb16244ecb8e8463076e91ec4be0d52d]
Former-commit-id: 2266f5fc8a72c10c48e214f4682587b239bc1455
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine