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