Updating - Unknown % Complete
If you see the "Updating - Unknown % Complete" message for a Product Set, this does not necessarily mean there is a problem. The Product Sets plugin attempts to predict what percentage of the update process it has completed. If it cannot do so, for various reasons, the "Updating - Unknown % Complete" message appears. Typically, allowing a little more time for your Product Set to update is all that is needed.
If your Product Set updates are too slow, you might consider the steps outlined in this article.
If the message is displayed for longer than expected, please contact us.