29

Configure web

Mathematica

The final step is to modify your MSP.conf file to instruct the front end to use this server. The setting of FrontEnd 

LaunchCommand is described in the 

Appendix: Site Configuration

. Here is a sample setting that connects to the

X server on display :1. (This setting is present in MSP.conf as a comment.)

FrontEndLaunchCommand=mathematica  mathlink  display :1  nogui 

 geometry 1000x500+10+10

Now your Unix server should be ready to run webMathematica.

If you find that the front end does not launch correctly, it may help to add the name of the server in the configuration

file.  An  example  is  shown  below;  here,  myserver  is  the  name  of  the  machine  on  which  webMathematica  and

Xvnc are running.

FrontEndLaunchCommand=mathematica  mathlink  display myserver:1 

 nogui  geometry 1000x500+10+10

2.4.2 Other X Related Issues

The following section describes a number of further issues that relate to using webMathematica in conjunction with

an X server. If you have set up an Xvnc server as described 

above

 it should not be necessary to study these.

Connecting to the X Server

When the Mathematica front end runs it must connect to an X server. If the X server is being run by a different user

than that which is running the front end the X server will reject the connection, as shown below.

[root]# su tomcat

bash$ mathematica

Xlib:connection to ":0.0" refused by server

Xlib:Client is not authorized to connect to Server

xset:unable to open display ":0.0"

Xlib:connection to ":0.0" refused by server

Xlib:Client is not authorized to connect to Server

xset:unable to open display ":0.0"

Xlib:connection to ":0.0" refused by server

Xlib:Client is not authorized to connect to Server

xset:unable to open display ":0.0"

Xlib:connection to ":0.0" refused by server

Xlib:Client is not authorized to connect to Server

XMathematica:can t open display:0.0,exiting...

bash$

One way to avoid this problem is to allow all connections from the local machine.

 .