SYSTEM: V2.10.2
NUMBER: 197 MODULE: images.imcombine, ccdred.combine (and related scripts) SYSTEM: V2.10.2 DATE: Wed Jan 20 15:54:28 MST 1993 FROM: valdes BUG: When reject=[avsigclip|sigclip|ccdclip|crreject|pclip], combine=average, mclip=yes, and nkeep!=0 there is a rare possiblity of a segmentation error. This is more likely the fewer pixels are allowed to be rejected. This occurs in the step where the pixels with the lowest residuals are added back after too many are rejected and the pattern of rejections is such that only low pixels have been rejected. The sure workaround is to change the combine option to a median or mclip=no. However, changing other parameters such as nkeep, the sigma thresholds, or the combining algorithm is likely to avoid the problem. STATUS: Fixed for V2.10.3.