silent deinstall of 8.1.7

Hello: I am trying to uninstall the 8.1.7 client from about 200 workstation using an rsp file. AFter the prerequisites apss, I am presented with qan inventory selectiono scree, or, if running with the -silent switch, I get an error message that no product has been selected for deinstallation. The log is shown below - the response file is read,