Ok, I have two launch file custom actions, one for install, one for uninstall, both run a batch file, both batches reference a command script file. All files are being created successfully in [APPDIR]. Both launch file custom action dialogs have [APPDIR] in the "Working Directory" text box.
User Account Control dialogs occur at the expected times (when batch is being attempted), allowing to inspect the command being requested.
Commands within both batches fail to find their respective command script file, because the command is executing in c:\WINDOWS\SYSTEM32. This is *not* the APPDIR.
Any clues here?