Server system transmitting reflecting instruction to reflect usable print quantity to printer

A non-transitory computer readable storage medium storing a set of program instructions installed on and executed by at least one processor included in a server system, the server system further including:

• a communication interface connectable to an external device and a printer;
• and a storage, the set of program instructions when executed by the at least one processor causing the server system to perform:
• storing in the storage a usable print quantity in association with the printer in response to an increase request from the external device via the communication interface, the increase request being a request to store an increased quantity as the usable print quantity, the usable print quantity indicating one of the number of sheets and an amount of colorant which are usable for printing in the printer;
• determining, after the communication interface is disconnected from the printer, whether a reconnection is established between the communication interface and the printer;
• determining, when the reconnection is determined to be established, whether the usable print quantity stored in association with the printer has been reflected in data related to a usable quantity stored in the printer;
• and
• sending to the printer, when the usable print quantity is determined not to have been reflected in any data in the printer, a reflecting instruction to reflect the usable print quantity in the data related to the usable quantity stored in the printer.

A server system comprising:

• a communication interface connectable to an external device and a printer;
• a storage;
• and
• at least one processor configured to perform:
• updating a first usable print quantity stored in the storage on the basis of an increase request received from the external device via the communication interface, the first usable print quantity being in association with the printer, the increase request being a request to increase the first usable print quantity, the first usable print quantity indicating one of the number of sheets and an amount of colorant which are usable for printing in the printer;
• determining, after the communication interface is disconnected from the printer, whether a reconnection is established between the communication interface and the printer;
• determining, when the reconnection is determined to be established, whether the first usable print quantity is equal to a second usable print quantity stored in the storage to determine whether the first usable print quantity stored in association with the printer has been reflected in data related to a usable quantity stored in the printer, the second usable print quantity being defined as a variable that can be varied depending on information from the printer;
• sending to the printer, when the first usable print quantity is not equal to the second usable print quantity, a reflecting instruction to reflect the first usable print quantity in the data related to the usable quantity stored in the printer;
• and
• updating, after a reflection completion notification is received from the printer as a response to the reflecting instruction, the second usable print quantity so that the second usable print quantity becomes equal to the first usable print quantity.