Service com.softwareag.xtools.xdav.store.XDescriptorsStore@629820 initialization failed : WebDAV Server http://172.16.80.170:4000/taminowebdavserver/ is already defined. http://10.1.1.34:4000/taminowebdavserver/ can not initialize
When TWS initially creates a store, the URL of WebDAV server is written to Tamino. When TWS starts again, it reads the initial URL and compares to its own URL. So no two WebDAV servers are allowed to access the same data. However, when your server gets its IP address dynamically, it may vary each reboot and you might get the error you reported.
To get rid of that, define force-connection=true in your store configuration file. For more info see WebDAV docu, Administration, Configuring Collections.
Hope this helps,