SCCM Task Sequence Error "The requested software cannot be located"

Another day another task sequence......

If you get the following error when trying to run a task sequence from within the OS:

Followed by this type of error in the execmgr.log file:

Then the problem most certainly lies with a package your task sequence is referencing, to test simply delete the steps from your task sequence that reference a package (backup your TS first!)

Delete them one by one and you will eventually find the culprit :)

Or run through the task sequence and check each package has a DP assigned to it and has been updated recently

Cheers