why do large files get corrupt?

Jul 31, 2015

I am creating large SL files for my client who loves a lot of animation. After I recorded the voiceover, the file seemed to get corrupted. It went from 85,00 Kb to 3,000 KB. In story view it looks fines. But when I open a single screen it is all grayed out. does anyone know what is going on and how to prevent this? Or how to get my latest file version back? Thanks!

3 Replies
Ashley Terwilliger-Pollard

Hi Susanne, 

I'm sorry to hear about the trouble with your file. File corruption is unpredictable, and there's no straightforward way to determine what causes it. Common causes are environmental (disk errors, power outages, improper shutdowns), viruses, failed Windows updates, and even file size (i.e., very large files have a higher risk of corrupting).

Consider these preventative measures to protect your project files:
1) Save and publish projects on your local hard drive. Working on a network drive or external USB drive can cause erratic behavior.
2) Save incrementally. If your app has an AutoRecovery feature, take advantage of it. If not, save a new version of your project every hour or so with a new file name each time. If a file becomes corrupt, you'll still have a working version available.
3) Install Dropbox. Snapshots of changes in your local Dropbox folder are kept for 30 days. If a file is damaged or deleted, you can restore a previous snapshot: https://www.dropbox.com/help/11/en.
4) Don't leave the app open and unattended for long periods of time. Some users have reported file corruption after leaving their apps open overnight. It's possible that a malware scan or disk backup could run because the machine is idle, making your app vulnerable to crashing.
If the file is corrupt beyond recovery, there may still be a working version of your project in your temp files. Here's how to check:
1) Open this folder in Windows Explorer:
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.
Hope that helps! 

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