... The BADPIX extension here contains the CHIPX/CHIPY chip-orientated co-ordinates of the bad pixels. ... The task checks for duplicity between any badpixfind input and bad pixels contained within the CAL. Irrespective of whether CCF bad pixels are required to be input into the BADPIX extension or not, the task gives general information as to CCF/ badpixfind double entries. ... Also the task checks whether the badpixfind entries themselves have any overlapping pixels. ...