I am trying to install a Lightroom 5.6 package that I built via a batch file. The syntax I'm using is:
start /wait Exceptions\ExceptionDeployer.exe --workflow=install --mode=post
Each time I run it (as an admin), the script terminates and I receive a return code of 2 from the installer (unknown user interface mode specified). I get the same result when I try to run this interactively. I don't see any logs being generated in \Common Files\Adobe\Installers so I'm not getting any details of what is breaking. I have this line in loads of other batch files that I've built and haven't had any issues. In fact, this is a rebuild of a package I previously built but scrapped (after install, the program kept looping on the accept-license window). This is a 64-bit build running on a freshly-imaged 64-bit test system with no other Adobe products installed. This is built with the CCP as a Serial Number License.
Usually something like this turns out to be really stupid and embarrassing, but I am totally stumped by this.
Thanks,
Ric