For System Level External Configuration only, which is the recommended configuration to use, be sure to create the CAOMWV12_HOME environment variable before running the configtool. The variable should point to the CA OM Web Viewer install location. DO NOT POINT CAOMWV12_HOME to the CONFIG directory. Point to the parent directory of the CONFIG and LOGS directory. If you are running on the Windows platform, Web Viewer will create the CAOMWV12_HOME environment variable for you.
For system level external configuration, the configuration tool will pick up the CAOMWV12_HOME location to locate the configuration files.
Please refer to the CAOMWV12_HOME Environment Variable Section of our Web Viewer 12.1 Docops page.