Save and load a Query from table

Hello together,

I would like save a query into a table. I have found the following link which exactly this case.

http://dynamicsax-dev.blogspot.com/2008/10/displaying-and-saving-query.html

I have tried it but I get the following error message while compiling:

The field must be a data element that allows assignment.

The code which I use is the follows:

void clicked()
{
    Query q = new Query();
    QueryBuildDataSource qbds, qbdsSalesLine;
    QueryBuildRange queryBuildRange ;
    SalesTable salesTable;
QueryRun queryRun;

    ;
    element.lock();
    //queryRunTemplate = locWmsShipmentTemplate.queryRun();
    //info(strfmt("%1", element.args().record()));

    if(!element.args().record())
    {
        //throw error("@SYS31996");
    }
    salesTable = element.args().record();
    qbds = q.addDataSource(tablenum(SalesTable));
    queryBuildRange = qbds.addRange(fieldNum(SalesTable, SalesId));
    queryBuildRange.value(salesTable.SalesId);
    qbdsSalesLine = qbds.addDataSource(tablenum(SalesLine));
    qbdsSalesLine.relations(true);

    queryRun = new QueryRun(q);
    info(q.xml());

    if (! queryRun.prompt())
    {
        info('return');
        return;
    }
    My_Sales_Settings::find(salesTable.SalesId).QueryX = queryRun.pack();
    element.unLock();
    super();
}

QueryX is a container field of the Table.

Do anyone now what is wrong?

Best regards

cakbulut