Raise error if there's not a block given
Raise error if there's not a block given

CartoDB/cartodb,codeandtheory/cartodb,CartoDB/cartodb,bloomberg/cartodb,splashblot/dronedb,codeandtheory/cartodb,splashblot/dronedb,codeandtheory/cartodb,splashblot/dronedb,bloomberg/cartodb,bloomberg/cartodb,codeandtheory/cartodb,CartoDB/cartodb,CartoDB/cartodb,splashblot/dronedb,CartoDB/cartodb,bloomberg/cartodb,codeandtheory/cartodb,bloomberg/cartodb,splashblot/dronedb