Problems with Silent Installation / Upgrade of Dell ControlPoint System Manager A16 Update

I was trying to update the Dell ControlPoint System Manager update from A15 to A16 on my Dell Latitude E6410 laptop today via a package created in SCCM.  However, in trying to use the silent installation command:

msiexec.exe /i dellsysmgr.msi REBOOT=ReallySuppress /qn /l*v %TEMP%\DellSysMgr.log

The installation continued to fail.  When running it non-silently I’m getting the following prompt:

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Question
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This will update the System Manager software present on your system. Note: This version will no longer integrate into the Dell ControlPoint launcher. Continue?
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Yes   No
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So far I’ve tried the following command line Properties without success based on an .MST capture to compare the MST to the original MSI file:

ISCHECKFORPRODUCTUPDATES=0

UPGRADE_REMOVE_DCPFRMWRK=1

ISACTIONPROP1={4DEF2722-7EB8-4C5F-8F0A-0295A310002A}

SYSCAP.LLP=1 or 0

SYSCAP.PORTABLE=1 or 0

LAUNCHREADME=1 or 0

InstalledSysMgrVersion=1.4.00001

Eventually I just gave up and used the old standby approach of uninstalling the old version before installing the new version with the following command line:

MsiExec.exe /X{4DEF2722-7EB8-4C5F-8F0A-0295A310002A} /QN REBOOT=ReallySuppress

Anyone else have a more elegant solution to this problem?

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