Patent ID: 8308154

Claim:
A control method for an image forming system including an image forming apparatus forming an image on a sheet and a first sheet process apparatus having a first moving unit that receives the sheet on which the image is formed by said image forming apparatus and moves the position of the sheet in a width direction orthogonal to the direction in which the sheet is transported, the control method comprising: a determination step for determining whether a second sheet process apparatus having a second moving unit which moves the position of the sheet in the width direction is connected to a side further upstream than said first sheet process apparatus; a detection step for detecting an abnormal condition of said first moving unit; and a sheet movement step for causing said second moving unit to change the position of the sheet in the width direction while the sheet is transported along said second sheet process apparatus if an abnormal condition is detected in said detection step and it is determined that said second sheet process apparatus is connected in said determination step.