Explorer78

Thanks all of you for your replies

Adnykay,
INSTRTYP does not have a field called CSEQ.
Oracle Field mapping is correct and field CSEQ exists only in the Primary File.
I have put messages in After Read No Error of Primary File and the value gets changed from there.

Shaun,
The LS has been specified as Paging.
I get a 'Record Not Found' error if I removing paging from it.

George,
There is a DSEL in the second file, which is deselecting the record.
I am going to write a test function to check it out further.