With the IBM® 3800 Printing Subsystem, a cancel key or a system-restart-required paper jam causes both a lost data indicator to be set in DCBIFLGS and a lost page count and channel page identifier to be stored in the UCB extension. Reset the lost data indicator bit (DCBIFLDT) and the first two bits in the DCBIFLGS field to zero before reissuing requests to the printer. For additional information see IBM 3800 Printing Subsystem Programmer's Guide and IBM 3800 Printing Subsystem Models 3 and 8 Programmer's Guide.