Twitter limits some tweets that are duplicates. Typically, if a Socialcast with Variations failed, it is due to one or more of the variations being duplicate tweets.
This can be verified by navigating to Socialcasts and clicking on the "Detail" button for the Socialcast that failed. From there, confirm the actual variation that was sent and check for duplicates.
How Do I Prevent This From Occurring?
- Make sure to use different content for each variation
- Schedule the variations out over a longer length of time.