It can sometimes happen that an error message appears in Tomcat but the window disappears too quickly to be able to read it. If this happens, you can modify the catalina.bat file to solve this problem. Open catalina.bat in a text editor and search for the following command:
set _EXECJAVA=start "%TITLE%" %_RUNJAVA%
remove this line and add the following instead:
set _EXECJAVA=%_RUNJAVA%