RSA7 return 0 (Empty) for data source(2LIS_13_VDITM) and (2LIS_13_VDHDR)

I have a problem that delta queue in RSA7 for the following 2 data source still equal zero for 3 days

2LIS_13_VDITM

2LIS_13_VDHDR

This happened for me after I had made 2 successful delta in the same day for both data sources after that when I go to RSA7 I found the delta for both data sources equal zero

before this day everything was ok

I don't know if I need to make a re-initialization

note: the delta update is direct delta