Image forming system having an image checking apparatus and non-transitory computer-readable medium

A non-transitory computer readable medium storing a program causing, in an image forming system which includes an image forming apparatus that forms an image on a recording medium and an image checking apparatus and in which each of the image forming apparatus and the image checking apparatus includes a computer, the computer of the image forming apparatus and the computer of the image checking apparatus to execute a process, the process comprising:

• causing the computer of the image forming apparatus to transport a recording medium at a set transport speed;
• causing the computer of the image checking apparatus to acquire transport-speed information concerning a transport speed from the image forming apparatus, the transport-speed information being used as control information of the image forming apparatus;
• causing the computer of the image checking apparatus to detect a mark shown on the recording medium which is being transported;
• causing the computer of the image checking apparatus to read a checking-target image on the basis of the acquired transport-speed information and information concerning a positional relationship between the mark and the checking-target image, the checking-target image being formed by the image forming apparatus at a position distant from the detected mark;
• and
• causing the computer of the image checking apparatus to notify the image forming apparatus of an operation state of the image checking apparatus,
• wherein the process further comprises causing the computer of the image forming apparatus to, in a case where the image forming apparatus has received a notification indicating that the image checking apparatus is in a state of performing checking, prohibit the set transport speed from being changed, and, in a case where the image forming apparatus has received a notification indicating that the image checking apparatus is in a state of having finished checking, cancel the prohibition of changing the set transport speed and stop transport of the recording medium.