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Troubleshooting When Status Is
White 
The status White means that the CCMS is unable to connect to the TREX GRMG server. This section describes how to handle this error.
...
1. Check whether the URL of the TREX GRMG server is entered correctly in the XML customizing file that was loaded to the CCMS. The XML customizing file GRMG_config.xml is located by default on the TREX host in the directory <TREX_DIR>//exe/python_support/grmg.
File: GRMG_config.xml (extract):
<scenstarturl>http://<trex_host_name>:<GRMG_server_port_number>/
</scenstarturl>

If you are using a 6.20 SAP system, you have to specify the domain in the URL: http://<trex_host_name>.<domain>:<GRMG_server_port_number>.
2. If you changed the XML customizing file, restart the TREX GRMG server. Do this by restarting the TREX daemon.
3. Check that the TREX GRMG server is running by entering the following into the Web browser:
http://<trex_hostname>:<GRMG_server_port_number>
4. Refresh the display in CCMS by calling up transaction RZ20 again.