webMathematica generates this message when the requested Java Server Page is not available at the specified URL.

Verify that the Java Server Page being accessed is available in the specified path in the URL. For example, the URL “localhost:8080/webMathematica/Example.jsp” indicates that the file “Example.jsp” is located in the webMathematica directory in the Tomcat layout. Because Java Server Page names are case sensitive, verify that the cases of the characters in the path name match the URL.