Try checking in the problems panel from Code view, sometimes that offers a bit more info on what's going on.
I am also getting the same problem can anyone give a good solution.
This problem indicates a bug in Catalyst. To help us diagnose it:
1. Switch to Code view. You can do this from the little combo box in the far top right of Catalyst.
2. Look at the "Problems" panel. If there's a category called "Errors", expand it and tell me what's in it (or send a screenshot).
I have seen this error when you Convert artwork to a component in HUD (like Scrollbars, textinput, etc) and dont assign the required fields for the components. Eg: for scrollbars we are required to assign the track, thumb, right and left arrows
But if its happen when you open a new project then I will let Adam or others chime in on that..
thank you for your interesting fu...i have found result of my problem sending to you.because of my operating system is not English. the main problem was that. in this situation it will be have to copy that
at C:\Program Files\Adobe\Adobe Flash Catalyst in Adobe Flash Catalyst.ini's ending paste
Glad to see you have resolved the problem and even happier that you are sharing the solution. This is what makes this forum so much more valuable.