How odd... that it worked at your home lot and not on the comm lot...
Questions and suggestions that may help debugging:
1) Did the interaction actually pop on your queue? Or does it fall of the queue? If so, does it stay there for some time or does it disappear immediately as soon as it reaches the top (or does it fade away right away and never actually stick on the queue)?
I think Jeanne's queue was empty when I asked. Maybe an autonomous romantic interaction (they'd just got engaged, after all), but nothing more. It was there a short time. I think the animation might have started but don't remember exactly.
2) Did you have debug mode on (and if so, no error log)?
Yes, I always have debug mode on. However, my game's been throwing weird errors from the dog's grave and from simply having more Sims than my puter can really handle living on a lot. Will try to find it tho.
3) Next time you try this on a comm lot and it fails... temporarily make the townie selectable, and then try the interaction again. Does the interaction stay on your playable sim's queue (and all the other questions from part 1)?
Also... what about all those same questions but for the townie that you made selectable (i.e. does the interaction actually stick on the townie's queue or does it fall off)?
Well, my Sims have now founded their own frat house and have their boy and girl-friends move in and become playable, so I doubt I'll be doing this again.
4) You said the sim got two diploma's... did everything else seem to work except for the age transition? What type of comm lot were you on? Were you still on a uni comm lot? Or a "regular" comm lot in your base hood, downtown, or shopping district?
The only changes I can really ascribe to the failed Grow Up is the extra diploma and one lock (she now has 3, didn't notice it before). Other than that, I can't tell what came from the failed attempt and what came from the real attempt.
Since the inviting Sim was an adult, the Uni comm lots are off limits, and I don't have many Uni comm lots anyhow, since this is a custom Uni hood.
5) What controller type are you using? regular/default, noage, notype, or norel?
Regular.
6) When it finally worked on the regular home lot... did that townie get all the other proper stuff (GPA like you said - did it match the one from the asking sim?, diploma, corresponding memories, etc.)?
Everything seems to be fine except the extra diploma and lock. Her GPA is the one I picked, she's got 6 want slots (but 3 locks), two diplomas, one set of memories, etc.
I suppose you could probably delete one of the diplomas? *shrugs*
Anyways, any further info could help.
Or she could hang one on the wall and move... I'm still debating the future of this family!