JESS: Problem while range checking

[Srinivasa Rao]

 

Hello Users,

 

I have defined a deftemplate with slots and I have not given any specific type for slots viz., ATOM, INTEGER etc.,

In some rule I am trying to check the value in that slot, whether the value is in a range, let us say 0-100. The program exits saying the following

error.

 

The error looks like this:

Rete Exception in routine Value::intValue while executing rule LHS: [Node1 comma
nd=TEQ;data=(or (>= ?0,2,-1 0));type=0;idx=2;usecount = 1] while executing defru
le PlatformGetMaximumValue.
  Message: Not a number: nil type = 1 at line 66:  ( run ) .
        at jess.Value.typeError(Value.java:299)
        at jess.Value.numericValue(Value.java:181)
        at jess.GtOrEq.call(Funcall.java:1315)
        at jess.Funcall.simpleExecute(Funcall.java:341)
        at jess.Funcall.execute(Funcall.java:301)
        at jess.Funcall.execute(Funcall.java:201)
        at jess.Or.call(Funcall.java:1138)
        at jess.Funcall.simpleExecute(Funcall.java:341)
        at jess.Funcall.execute(Funcall.java:301)
        at jess.Funcall.execute(Funcall.java:205)
        at jess.Node1TEQ.callNode(Node1.java:528)
        at jess.Node.passAlong(Node.java:163)
        at jess.Node1TECT.callNode(Node1.java:607)
        at jess.Rete.processTokenOneNode(Rete.java:919)    

 

Can somebody let me know how I can overcome this problem

 

Thanks in Advance

 

srinu