There is provided an error recovering method that can be applied to a photobook production flow handling plural types of parts and reduces operator's manual workload while keeping consistency in the job order between the plurality of parts at the time of occurrence of an error. An information processor receives information on an error that is caused in a printer or a post-apparatus and determines whether or not reprinting of a target part is necessary. When determining that reprinting is necessary, the information processor updates job tickets of an error-caused part and other types of parts and transmits the updated job tickets to the printer and the post-apparatus. The printer and the post-apparatus execute post-processing in accordance with the job tickets updated by the information processor.