JSP expressions are displayed as string

[haimra]

I am having this wired problem driving me crazy.

I am using JSTL and Tomcat 5.0.30. 

Some times for unknown reason the JSP expressions are displayed as string
for example 

The following command 

<c:out value="${fn:escapeXml(param.code)}"/>    

 

will display the expressions fn:escapeXml(param.code)

and not the actual value of param.code 

 

Any clue why this happens?