Expressions randomly turn themselves off?

[Dan Ebberts]

Really hard to say without seeing the project (or at least the error message and the text of the broken expression), but there are a couple of things I know of that seeminly break expressions at random. If motion blur is turned on, it can cause an expression to execute before frame 0, where everything that the expression references may not be defined, and having the graph editor turned on can do the same thing because it draws a little piece of its graph to the left of time 0.

Dan

[Charlotte Caetano]

Hi Dan,

Thank you for your prompt reply.

I turned off all the options and switches I could think of (for the moment) though the expressions do still keep randomly turning themselves off. There are no error messages, it just suddenly occurs.

I have wondered if the problem cannot be fixed, is there a shortcut key to enable and disable all expressions on selected layers at once? As opposed to having to twirl down the postion properties of each layer?

Failing that, is there a way to create a further expression in the compostition (perhaps linked to a null with a checkbox) that will achieve the above function?

I hope this makes sense,

Thank you for your help

Charlotte

[Dan Ebberts]

I’ve never seen an expression turn itself off without an error message.

In any case, the only thing I can think of would be a script that would go through the project looking at each property, checking for expressions that are disabled. I don’t have a script like that, but someone may have one.

Dan

[Charlotte Caetano]

Hi Dan

Okidoke I will have a look around. Thank you for your efforts and advice.

All the best,

Charlotte