| http://www.w3.org/ns/prov#value | - Upon receiving only NG (No Good) responses from the host computer 104, after transmitting the information including the bar code information, position information and time information to the host computer 104 n times (Yes of a step S2-5), the CPU 126 determines that the article 105 should not be collected or delivered at the present position, and generates an error log (in a step S2-6).
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