UV Transactions & SETPTR

[Chuck Stevenson]

Not allowed (@ UV10.3 on Windows. ISOMODE = 1) :

   BEGIN TRANSACTION 

      . . .

      EXECUTE "SETPTR . . . "

      . . .

      COMMIT

   END TRANSACTION

At least vanilla uv does not allow it by default. 

That can be overridden by including processor code 'H' in VOC SETPTR <4>.

WHY IS THIS A BAD IDEA?  

Is it only because SETPTR ,,,,,3,BANNER UNIQUE XYZ  

needs to increment DICT &HOLD& NEXT.HOLD?

If so, either avoiding that or changing DICT &HOLD& to type 19  would make it safe inside a transaction, right?

I'm trying to retrofit TRANSACTION / COMMIT / ROLLBACK into an old module of an old ap.  That is something I generally avoid, even though I usually write new code with that method.

TIA,

Chuck Stevenson