without sounds like the client is referring to a Grayscale Image Box that does not exsist on the server. This is also what error 274 (0x112) is telling. From the standard part 7:
C.5.19 No Such object instance
Status (0000,0900) US 1 Confirmation status of the operation. The value of this required field shall be set to 0112H.
So, during DICOM print protocol the client creates a layout on the server and receives as a response some unique Instance UIDs, one for each image of the page. The number of UIDs (and so the number of boxes) is implicetly calculated from the layout chosen. The error message usually implies that your SCU tries to talk about image boxes (maybe for filling them with pixel data) which does not exist, ie it is using the wrong Instance UID(s) - not the one returned by the SCP before.