Java.lang.IllegalArgumentException error using PARAM

Question

Ok, I got my pagination to work on my jsp, but now if I leave that page and come back I get the 500 error above
here's my pagination code:
<%--Pagination --%>
<c:out value="Page: "/>
    <c:forEach begin="1" end="${lmdao.pageCount}" var="i">
                <c:choose>
                  <c:when test="${i<=lmdao.pageCount}">
                         <c:set target='${lmdao}' property="pageNumber" value='${i}'/>
                         <a href="ListingManager.jsp?userType=${uType}&userId=${uId}&ipAddress=${ipAddress}&source=${item.source}&pageNumber=<c:out value="${i}"/>"><c:out value="${i}"/></a>
                        <c:set var="i" value="${i+1}"/>     
                        </c:when>
                         <c:otherwise>
                       <c:out value="${i}"/>
                  </c:otherwise>
             </c:choose>     
   </c:forEach>
<c:set var="pageNumber" value="${pageNumber + 1}"/>Here's my code at the top to access parameters and target them to methods in the database call:
           <c:when test="${param['pageNumber'] > 0}">
                <c:set var="pNum" value="${param['pageNumber']}"/>
            </c:when>
        </c:choose>
        <c:set var="ipAddress" value="${pageContext.request.remoteAddr}"/>
        <c:set target='${lmdao}' property='ipAddress' value='${pageContext.request.remoteAddr}'></c:set>
              <c:set var="pageNumber" value="${lmdao.pageNumber}"/>
        <c:if test="${pageNumber == 0}">
        <c:set target='${lmdao}' property="pageNumber" value='1'/>
        </c:if>
        <c:if test="${pNum > 0}">
        <c:set target='${lmdao}' property="pageNumber" value='${pNum}'></c:set>
        </c:if>
      <c:if test="${pageNumber > 0}">
        <c:set target='${lmdao}' property="pageNumber" value='${param["pageNumber"]}'></c:set>
       <%-- <c:set var="pNum" value="${param['pageNumber']}"/> --%>
        </c:if>This part of the code is allowing me to update my JSP with updated pageNumber values, but it's also the same part that seems to cause the 500 error if I leave the page and come back...any suggestions?

Answer 1

Hi all,
I figured out the answer, I had an unnecessary "month" inside
the function, once I removed it, no more error:
#urlencodedformat(encrypt(createdate(year(now()),
month(now()), daysinmonth(now())), 17))# works fine.