This task sequence cannot be run because a package referenced by the task sequence could not be found.

If like me you have been bashing your head against many firewalls during Windows 7 OSD via SCCM you will probably sometime come across the error:

This task sequence cannot be run because a package referenced by the task sequence could not be found.

More annoyingly it doesn't reference the guilty package in the onscreen error.  After checking the many log files CCM generates I found within the RAM drive path: x:\windows\temp\SMSTSLog resides the relevent SMSTS.LOG file.

The full error I recieved was after selecting the relevant OSD TS; resolving polices and then BAM :

This task sequence cannot be run because a package referenced by the task sequence could not be found. For more information, please contact your system administrator or helpdesk operator.

I also noticed (and please use SMS Trace to view error logs):

Failed to find CCM_SoftwareDistribution object for AdvertID="xxx", PackageID="xxx", ProgramID="*"

I found it was a Lenovo Graphics Driver Package causing the issue; it appears SCCM has yet another little "quirk" where the hash isn't written sometimes upon creation of a package and the initial ditribution.  If the version number of the guilty package is "1" try right clicking on the DP of the package and select "Update Distribution Points".

After some time the Source Version will increment to "2" and the date will be current - give your OSD another try and then see if it works - if it fails - check the log file again as this time the guilty package may have changed and it may be a case of trawling through a few before you resolve the issue.

I hope this helps.

Many thanks to J over at ManagedUX for the pointer!