This FAQ page is intended as a place to post questions and answers about faults and failures that clog up the IPP. It is organized into sections for each of the primary steps of the IPP.

Load and Setup

INJECT

REGISTER

Detrends

DETREND CREATION

Science Processing

CHIP

"I've got a few bad cells in an otherwise acceptable GPC1 exposure. How can I cover up the faults from one cell in order to proceed past the chip stage?"

You can set the 'ignored' field to 1 in the rawImfile table for the exposure and class_id of interest. Some chips in the corner of the GPC1 (e.g. chip XY17) are really poor, so doing this can be a good idea anyway. If the offending -and now ignored - chip continues to block the camera stage, you may need to 'revert' any faulted rawImfile and chipProcessedImfile entries with regtool and chiptool.

Note that chiptool will only revert a chipProcessedImfile that has a non-zero fault value, so you must first use "-updateprocessedimfile -code 6" or something, and then do "-revertprocessedimfile -code 6" to re-run them. Furthermore, once you've set a class_id to 'ignored' then it won't run through the chip stage at all, so you'll have to revert some other class_id in order to re-start the pipeline for that chipRun.

CAMERA

FAKE

WARP

STACK

DIFF