Hi Rama Krishan,
If this issue is not solved yet, then you can check following:
As we know.
Delta Relevant Field - TMSTMP
Now I checked in my system that this field has a domain type of CHAR14. So basically it should accept the UTC time stamp which is in format YYYYMMDDHHMMSS.
But there is a catch in it. Normally in SAP timestamp conversion the field is TIMESTAMP (this is a dataelement) and it is of type DEC length 15. So the timestamp gets internally converted to something like 20.111.206.153.747 for a date and time of 06.12.2011 15:37:47 (system uses conversion here)
So baiscally in you delta enabled field the system must not be able to identify the correct timestamp and is extracting all the delta data irrespective of time of last delta extraction.
You can confirm this in RSA3 while debugging.
Having said that, try changing the data element of your delta relevant field to TIMESTAMP. Then re-initialize and run the delta. It should work fine as per your requirement.
If you have build your datasource based on Function Module then check the selection criteria in the input range selections. Please share your code in this case I will check it.
Please le tme know if there are any questions
Regards
Amit