When you use StandaloneLibs, even the most current version and Prat. And update without externals, this Sharedmedia will not be in your directory.
OK, this is strange, when you check on filelist.wau, in the StandaloneLibs Directory, the sharedmedia.lib is there ..... ??? hm
I am pretty sure that it is an WAU and WUU issue, since they dont even try to copy and install SharedmediaLIB
I notice that !!!StandaloneLibraries/SharedMediaLib is an empty dir. All the other lib-dirs contain a file called "placeholder.txt". Could that be the issue for WAU?