"Application has unknown namespace"...

When we install our Native Extension installer (Win7 x64), we’re seeing the error:

Application has unknown namespace http://ns.adobe.com/air/application/3.7. Attempting immediate runtime update

Application Installer end with exit code 9

The appication is not already installed.

There are surprisingly few references to that phrase. Can anyone tell me what it means? Or why this Native AIR Extension installer fails?

Thanks.

Keith

[2013-06-05:15:26:45] Bootstrapper begin with version 3.7.0.1530 on Win x86

[2013-06-05:15:26:47] Installed runtime (3.3.0.3670) located at C:\Program Files (x86)\Common Files\Adobe AIR

[2013-06-05:15:26:47] Launching subprocess with commandline "Adobe AIR Application Installer.exe" -silent -eulaAccepted -programMenu "C:\Users\labuser\AppData\Local\Temp\AIR6DCA.tmp\Adobe Content Viewer"

[2013-06-05:15:26:47] Runtime Installer begin with version 3.7.0.1530 on Windows 7 x86

[2013-06-05:15:26:47] Commandline is: -silent -eulaAccepted

[2013-06-05:15:26:47] Installed runtime (3.3.0.3670) located at C:\Program Files (x86)\Common Files\Adobe AIR

[2013-06-05:15:26:47] Starting silent runtime update. Updating runtime from version 3.3.0.3670 to version 3.7.0.1530

[2013-06-05:15:26:47] Installing msi at c:\users\labuser\appdata\local\temp\air3351.tmp\setup.msi with guid {A0087DDE-69D0-11E2-AD57-43CA6188709B}

[2013-06-05:15:27:02] Application Installer begin with version 3.3.0.3670 on Windows 7 x86

[2013-06-05:15:27:02] Commandline is: -silent -eulaAccepted -programMenu "C:\Users\labuser\AppData\Local\Temp\AIR6DCA.tmp\Adobe Content Viewer"

[2013-06-05:15:27:02] Installed runtime (3.3.0.3670) located at C:\Program Files (x86)\Common Files\Adobe AIR

[2013-06-05:15:27:04] Validating app in folder C:\Users\labuser\AppData\Local\Temp\AIR6DCA.tmp\Adobe Content Viewer

[2013-06-05:15:27:07] Application signature verified

[2013-06-05:15:27:07] Unpackaging/validation complete

[2013-06-05:15:27:07] Application has unknown namespace http://ns.adobe.com/air/application/3.7. Attempting immediate runtime update

[2013-06-05:15:27:07] Application Installer end with exit code 9

[2013-06-05:15:27:08] Subprocess Application Installer failed (9)

[2013-06-05:15:27:08] Bootstrapper end with exit code 9

[2013-06-05:15:27:20] Runtime Installer end with exit code 0