I have created a BW query to perform that analysis. It calculates a "aging" of the last execution compared with "today"
I used the cube 0TCT_MC01 and created on the BEX QUERY:
1) A Formula "Last Execution" using the function LAST Aggregation function on a "Formula Variable" based on 0CALDAY
2) A Formula "Today" using SAP delivered "Formula Variable" : "0F_ADAY"
3) A Formula " # of Days without execution" with "2 - 1".
Tips, check if the query still exists (not deleted) using attribute 0CB_DVE of infoobject 0TCTBISBOBJ.
This is how the query looks like:
To see more than one year, just sort by aging and filter > 365.
I also want to see how many different users executed that query, so I created a formula "# of Users" = "1", with summation aggregation on 0TCTUSERNM...
Hope it helps,
Rodrigo Silva