Hey Everyone... any help is greatly appreciated. Finally reaching out as I can not see what the heck I am doing wrong here.

I am just trying to grab string data from the request URL  - code originally worked fine without the encodingutil class on simple reports - however as reports got more complex with special characters I would recieve the BLOB is not a valid UTF-8 format - so I introduced the base64string and now I am receiving this error.

Help before dreamforce recieve an extra special prize!

Thanks everyone!
Justin

public class CSVexport {
    public static Boolean isTest;
    public static String strEmailAddr;
    public static String strOut;
    public static Boolean restRequested;
    public String strEmail{get;set;}
    public String strRptname{get;set;}
    public static base64string;
   
    void CSVexport () {
        strOut = '';       
        }

   public String getCSVexport() {
        restRequested = System.isFuture() || System.isScheduled();
        executeRpt();
        return strOut;
        }
 
    public void executeRpt() {
        String requestURL;
        requestURL = '/' + strRptname + '?csv=1&exp=1';
        strOut = new PageReference(requestURL).getContent().toString();
        base64string = EncodingUtil.base64Encode(base64string);
        System.debug('CALLING executeRpt:  output= ' + strOut );
    }

}