[development-axapta] Error on the field String: "controlName" on the report "reportName".

[staffuwa]

Hi Guys,
   why the system returns this error when I try to add a string field
on a programmable section inside a report?
I tried to insert the new field in this way:

----------------------------------
public void executeSection()
{
    str nome;
    super();

    nome = int2str(progrSezione);
   
programmablesection.addStringDisplayControl(this.showQty()).name(nome);
    element.execute(1);
    // the first time the execution section is called, the name of the
control is "1", then it will be incremented 
    progrSezione+=1;
}
-----------------------------------------------------------
Thank you in advance.
Daniele