Here are couple steps to diagnose the “Failed to Run Task Sequence” error.
The hole error looks like this:
The task sequence cannot be run because a package referenced by the task sequence cannot be found. For more information please, contact your system administrator or helpdesk operator.

Basically this error means that the problem is with distribution of the package.
It looks straight forward process if you have one or two packages in a task sequence. But can be a problem if the task sequence has many packages. The best way to find out which package or packages are causing the problem is to use the task sequence log Smsts.log. (more…)