A problem with tomcat 6.0.18

[Paulo Vitor]

Hi, is my first question in the list.

I have a problem with tomcat 6.0.18, so, before I used tomcat 6.0.16 and
everything works fine, but when I upgrade to tomcat 6.0.18 the line
<c:forEach begin="1" end="#{unidadeAdm.tamCk}"> gives me a exception.

Cannot convert 20 of type class java.lang.Integer to class java.lang.Number.

I don't know what happens, but I have to use tomcat 6.0.18 and not
6.0.169 version.

Thanks and sorry for the bad english.