Hi Dinesh,
Double click on XIHPA it will take you to the top include.
Click on where used list in toolbar and click enter.
This will give you where all this table is used.
n/ow press Control + F and type APPEND.
There are some 10 locations where it is getting filled.
Another best solution will be finding it in debug mode.
Keep a WATCHPOINT on this table it will stop exactly where it is changed.
Regards