I am getting below error in the BIX log when running extract rule via activity pxExtractDataWithArgs. This error is intermittent and that's why it's bit difficult to trace what's wrong with Extract rule structure.
Inskey of the corrupt Instance SS-SE-SB-CONSUMER-WORK MM18-2840
2018-08-03 12:05:19,969 [RPCWorkManager. : 19] [SSESBConsLn:01.08.01] ( internal.access.ExtractImpl) ERROR - Unable to process while reading the source Db SS-SE-SB-Consumer-Work-MortgageMore: Index: 8, Size: 7
Yes i can open and I don't see anything wrong with the case. However I see similar article on PDN and it might be related to Page list structure issue but I am not very sure because the error I am getting is not exactly same as the mentioned in below thread.