AE - Invalid Menu Operation error

[#1]

Whenever I attempt to apply an effect onto a layer, a message pops up "After Effects warning: Invalid menu operation." This happens with just about any effect including the stock effects, plug-ins, and scripts.

To see the effect in the effect panel, I have to deselect the layer and reselect it which causes the error to pop back up and creates some kind of error loop.

Also, if I save a project after this error and leave an effect on a layer, when I reopen the project all layers below the effect layer disappear from my timeline.

Needing a bit of help here.

[#2]

Whenever I attempt to apply an effect onto a layer, a message pops up "After Effects warning: Invalid menu operation." This happens with just about any effect including the stock effects, plug-ins, and scripts.

To see the effect in the effect panel, I have to deselect the layer and reselect it which causes the error to pop back up and creates some kind of error loop.

Also, if I save a project after this error and leave an effect on a layer, when I reopen the project all layers below the effect layer disappear from my timeline.

Needing a bit of help here.

[#3]

You have not provided any useful techznical info like system info, the types of layers you work with, project settings and so on. That said, chances are you downloaded an invalid/ incompatible custom script with a panel and that continually intercepts wrong commands, causing teh error. So if you indeed blindly downloaded some outdated third-party JSX or whatever, start by removing it again. for anything beyond that much more specific info is required. Could even be something as trivial as your mouse/ tablet acting up.

Mylenium

[#4]

Thanks for the reply... and I should have given those details.

But, I think pinpointed the problem... too many layers in a composition. I reduced the number of layers and the problem went away.

So... is there a layer limit of some kind?