At power-up, the Printer thinks it is smaller than 42 inches.
Try the following:
1. Check that there are no obstacles in the Scan-Axis which stops the Carriage from reaching the end-stops on both sides.
2. Check that the Carriage moves freely from side to side.
3. Check that the IDS Crane is installed correctly on top of the Carriage and that the Carriage Cover is clipped on correctly.