Hi Abdul,
I recently had the same problem, this is the solution that SAP Support gave me and it worked:
1. Backup the content of table TPALOG;
2. Delete all its entries;
3. Modify the ENDTIME in TPALOGHDR table to a point in time before the
first timestamp in ALOG. This will force STMS to read the ALOG files
again and updates the table TPALOG.
They explained that the STMS looks in the table TPALOGHDR to check if the time frame for which
the import history is called is between STARTTIME and ENDTIME. If it is, it will use the entries in table TPALOG.If not, it will read
the ALOGxxxx files on DIR_TRANS/log and update table TPALOG.
You will find attatched the exact steps I followed.
Best Regards,
Luis Clemente