Predicate Expression Error

[Dan Ebberts]

I just tried it and it works fine. There must be something else going on. I’m not familiar with that error message, but if I had to guess I’d say that AE might be telling you that you’re trying to create an expression that loops back on itself (possibly through another expression somewhere). Are there other expressions in play here? Also, what’s the exact text of the expression that’s generating the message?

Dan

[Josh Kurz]

Hmmm.
So, I have a comp called “Testimonial_PTI” in that comp I have one precomp layer called, “PICT1” and another layer called “Timing Control 3”

There are two layers within “PICT1” I would like to link the opacity of one of those layers to a slider called “Transition” on “Timing Control 3” I’ve added the code below.

Not sure why this would affect anything but “PICT1” is linked to “Timing Control 3” with a nominalDur expression.

Hope that’s not too confusing.

[Dan Ebberts]

Did you mean to post some code? What’s a nominalDur expression?

Dan

[Dan Ebberts]

Also, what’s the expression that links the PICT1 layer to Timing Control 3? What property is it applied to?

Dan

[Josh Kurz]

Well I posted it in the “Please post Expressions Code in the box below” box but it didn’t show up I guess, sorry.

Here’s the code:
comp.(“Testimonial_PTI”).layer(“Timing Control 3”).effect(“Transition”)(“Slider”)

Here’s the nominalDur expression on the precomp itself:
p=thisComp.layer(“Timing Control 3”).effect(“Timing Control”)(“Slider”);
nominalDur=6;
valueAtTime(nominalDur*(p/100))

[Josh Kurz]

It’s applied to position, rotation, gaussian blur, and opacity.

[Dan Ebberts]

Ah, OK. You’ve got an extra period in there (after “comp”). Try this:

comp(“Testimonial_PTI”).layer(“Timing Control 3”).effect(“Transition”)(“Slider”)

Dan

[Josh Kurz]

Oh Lord.
Thanks, it works.

Sorry for wasting your time on this one.

Thanks again,

-Josh