PCSDK 6.05. BACKUP-Error

chaos87141

Hello,
I was creating an PC-SDK-Application and getting some troubles with RW 6.04.01 on
the real robot system.

I have also troubles creating a BACKUP of the system - VC is working and real system is creating errors.
The robot system is creating a BACKUP-Error - Error-ID: 11020.

My source code:
private void saveFileDialog1_FileOk(object sender, CancelEventArgs e)
        {
            if (controllerLokal != null || saveFileDialog1.FileName.ToString() != "" || saveFileDialog1.FileName != null)
            {
                try
                {
                    string backupDir = saveFileDialog1.FileName.ToString();
                    this.controllerLokal.BackupCompleted += new EventHandler<BackupEventArgs>(Controller_BackupCompleted);
                    this.controllerLokal.Backup(backupDir);
                }
                catch
                {
                    ShowMessage(translator.getText("Backupfehler"));
                }
            }
            else
            {
              ....
             }
         }

I would be appreciated for help
Thank you in advance