mcr cannot find java library

Hello,

I am using a function in matlab that calls upon the function urlencode (built in) that calls upon the java library (java.net.URLEncoder.encode).

I then try to compile my function into an excel addin but upon execution in excel I get the error message "Undefined function 'urlencode' for input arguments of type 'char'."

the function works fine from the matlab prompt so I presume I need to somehow include the java library into the DLL that I am compiling?

Can you provide assistance here