how to solve libXtst.so.6 error?

[pierre_2]

Hello everybody,

I'm running jasperserver CE 5.1 on an ubuntu 13.04 x64 server and everytime I want to do a report, i got this error :

Handler processing failed; nested exception is java.lang. UnsatisfiedLinkError: /opt/ jasperreports-server-cp-5. 1. 0/java/jre/lib/amd64/xawt/ libmawt. so: libXtst.so.6: cannot open shared object file: No such file or directory

 

java.lang.Exception: 1 - /opt/jasperreports-server-cp-5.1.0/java/jre/lib/amd64/xawt/libmawt.so: libXtst.so.6: cannot open shared object file: No such file or directory 
    at com.jaspersoft.ireport.jasperserver.ws.WSClient.runReport(WSClient.java:403) 
    at com.jaspersoft.ireport.jasperserver.ws.WSClient.runReport(WSClient.java:320) 
    at com.jaspersoft.ireport.jasperserver.ReportRunner.run(ReportRunner.java:70) 
    at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572) 
    at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)

 

Can somebody help me??

Thank you very much,

 

Pierre