We just pushed out updates to our Zenworks for Desktops agent, upgrading from version 7.1 hot patch 1 to version 7.1 hot patch 3, and all of a sudden some clients weren’t receiving their NAL apps.
I did some comparing of stations that had been upgraded against ones that still had the 7.1HP1 agent, and found that the 7.1HP3 machines were missing the c:\program files\novell\zenworks\nalagent.exe file!
It seems that this issue is fixed in the 7.1SP1 hot patch 3a agent. I personally deployed 7.1SP1 hot patch 6, which is current the latest agent available. I only upgraded workstation agents, I didn’t update any of my ZDM servers and everything seems to be going okay.
TID 3984745 has more information on this issue.