Slc 500 Overflow Trap Error

I have an slc 504 that faults every couple of days. The overflow trap bit S:5/0 is set and I get major error code 0020. I read in the documentation guide to add an OTU with address S:5/0 between the overflow point and the END statement. I did this at the end of the subroutine and the slc faulted immediately when put back in remrun mode. My question is, should the OTU be put in the subroutine, or at the end of LAD 2 where my JSR's are located ? Thanks in advance for any help.

You SHOULD fix the logic so that there is no overflow error.

For reasons why and how, see THIS POST

And for more ideas, see THIS POST

But if you can't fix it, putting the OTU as very last rung in LAD2 is probably the best quick fix.