The customer installed the CA MAT 11.0 GUI Server (Tomcat), however it does not start. The Server-xml file formatted by ASCII seems to not be able to be read correctly.
Tomcat is shared with another product (CEM). CEM is not started when the MAT GUI Server is started.
This problem occurs on their own z/OS system. They have use a copied version of Tomcat 8.
Installing the official CCS version of Tomcat 7 solved the problem.