To erase the routes is a little bit tricky. What we need to know, is the reference pointer of the rou which is/was in the removed LIM. How to find it/them:
1) With CNPIP:UNIT=DTM;
check where the active unit resides.
2) Then SACOP:UNIT=DTM,LIM=x,RELOFF=9,FILNO=1,POINT=0&&9c3;
Where x is for the active DTM LIM. The printout is HUGE (2500 records), but don't care! Now, in the data, is the LIM number (in your case 12 -> 0C). Write down all the
pointers, which point to LIM 12.
3) Now, to be sure that you are on the right track, sacop those pointers mentioned above with
SACOP:UNIT=DTM,LIM=x,RELOFF=6&7,FILNO=1,POINT=xyzw;
This sacop results in route number (HEX). If you have the information of them somewhere, it is good to check that they are correct.
If OK, just a SGSAI remains. But first insert the sacops here (not the long one, just those pointers you need to "kill").
Have a "nice" weekend!