Java EE (Java Enterprise Edition) General Discussion

hi,

I work under web application wich uses 5 servlet,this servlets integrates JESS,when i run my project under netbeans it's perfectly for
max 3 request ,but for 4' th request ,i reseave this message:

Jess reported an error in routine batch.
  Message: Cannot open file.
        at jess.Batch.findDocument(Unknown Source)
        at jess.Batch.batch(Unknown Source)
        at jess.Batch.batch(Unknown Source)
        at jess.Batch.batch(Unknown Source)
        at jess.Batch.batch(Unknown Source)
        at jess.Rete.batch(Unknown Source)
        at Batch.run(Batch.java:9)
        at EquServlet1.doPost(EquServlet1.java:49)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:710)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
        at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:856)
        at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:565)
        at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1509)
        at java.lang.Thread.run(Thread.java:619)
Caused by: java.io.FileNotFoundException: EquSym1.clp (Le fichier spécifié est introuvable)
        at java.io.FileInputStream.open(Native Method)
        at java.io.FileInputStream.<init>(FileInputStream.java:106)
        at java.io.FileInputStream.<init>(FileInputStream.java:66)
        ... 22 more

realy i don't use "equSym1" in my code,i just used "EqySym" only;

but i don't know where i find this error?

THKS FOR YOUR HELP.