Error in Preview and Publish

Just ran into this problem myself... thank you to whoever suggested importing a slide at a time to a new project. I isolated that the problem stemmed from a video - more specifically a video that I reduced the volume of using the video editor tool. When I uploaded it without reducing the audio, it does fine. Very weird, but thank you! Panic attack averted! 

I'm glad that this older conversation was able to help you, Megan. I appreciate you chiming in to share.

I am running into this issue in a 4.5GB, 7-scene, 200+ slide project. I have been troubleshooting for 2-3 hours today already.

Problem:
I try to preview selected slides; it starts loading, then gives me the error message.
I've been developing this course for months, and the issue started today after tweaking a few slides and then trying to preview them. The course is due in two days.
The issue happens 90% of the time - sometimes, it will let me preview some selected slides, but most of the time, it won't. There's no consistency as to which slides work and which ones don't.

Troubleshooting:
Restarted SL (many times)
Restarted PC (many times)
Uninstalled/reinstalled SL (twice)
Tried previewing different slides/different scenes (with only about 10% success)
Reverted to a previously saved version
*Created a new file and moved each scene in one by one

Other relevant info:
I am using a built-in disk, not a network drive
My computer is over-powered with plenty of free space
I don't leave SL open when I leave the computer or put it to sleep
I update SL every time an update is available.

Results so far:
*The only thing that seems to show any success at this point is coping and pasting all seven scenes into a brand new file. All scenes made it in, and the issue hasn't replicated itself yet. This would seem like a win, but it comes with a major caveat...
I was hoping that after moving in an allegedly corrupt slide, the error would appear, so I could pinpoint it and fix it in the original file. However, it didn't. The new file has no errors. Does that mean I need to spend the time re-creating my player and all the customization that didn't transfer over? I want to do everything I can to avoid this because it's adding hours of work late in the game, and I'm very concerned something will slip through the cracks. Is there any other way I can still make the original story file work?

Hi, Robbie.

Thank you for detailing what you're experiencing!

Since you've already attempted some of the suggested troubleshooting steps, I want to connect you with one of our support engineers through a case. I opened one on your behalf, so you should hear from our team soon via e-mail.

Hi, I am unable to preview the slides. It was working fine previously, but suddenly stopped working. I tried removing newly added objects, audio files, also imported it, but it's not working!

I have even tried copy, paste the slides on a blank slide, new project, still I get the same error message. Any guidance or suggestions to resolve this  issue are greatly appreciated.

Hi Sindhu,

Sorry to hear about your project file. 

Looks like you encountered possible data corruption in your file which is now preventing your course from being previewed or published. We recommend opening a case with our support team and sharing your *.story file there so we can attempt to fix your file. We'll delete if afterwards!

Additionally, you can also check your computer's temporary files for any working copies of the course. Here's how to check:

1) Open this folder in Windows Explorer: %appdata%\Articulate\Storyline

2) Scan the contents of this folder for a file that starts with the name of your project. If you find one, copy it to your desktop. If you find more than one, copy the latest version to your desktop.

3) Change the file extension of the copy on your desktop from *.tmp to *.story.

4) Double-click the file to open it in Storyline.