Huh? You sure you want the Adobe Premiere Pro forum?
Might want to move this thread to the Elements forum where it belongs.
Welcome to the forum.
However, as Ann points out, this is Premiere Pro.
I will Move your post to the PrElements Forum, where your link and any e-mail subscriptions will follow.
[Moved to PrE Forum]
Now that we have the post in the correct forum, let's look at troubleshooting the problem.
First, some questions:
What version of PrE?
What OS version are you running?
For PrE 11 - 12, have you download the Functional Content, that contains the Instant Movie Themes, Transitions, Menu Sets, etc.?
Good luck, and please let us know a bit more please,
There have some glitches surfacing recently related to the Instant Movie Outdoor Adventure. That one seems to target versions 10, 11, and 12 and was only reported now.
So, there may be other glitches related to some of these Instant Movies that just have not surfaced even at this late date.
But, to get to the core of your specific matter, details are needed, details which you have not yet supplied.
Top of the list, what version of Premiere Elements are you running and on what computer operating system?
And, what is the scenerio leading up to the appearance of the Unknown Error message? What is the exact
wording of the message and what are you doing when it appears?
Hunt has already mentioned questions that need answers.
We will be watching for your details. And, with those details, I will road test the issue to see if I can repeat it.