Error23: Error while parsing number

Having worked some on the grub configuration with Yast I must have changed something. On my hda1 I have drdos which I can not enter anymore. After choosing drdos in the grub menue I get above error. Cannot find what it means and have no solution for a solution. Google found this but that did not help much. Error while parsing number This error is returned if GRUB was expecting to read a number and encountered bad data Any ideas?