As the file system of an operating system program might be damaged by a crash, the file system is usually used neither for the selection of data to be dumped from a memory nor for the analysis of the dumped data, and all data contained in one or several areas of the memory are dumped. In order to preserve the integrity of the file system and enable its use after the crash, the memory is divided into a primary and a secondary memory section during a memory setup, file system data are transferred from the primary memory section to the secondary memory section widely out of the control of the operating system program, and a read access of a dump program is directed to the secondary memory section in order to select file system data to be dumped after the crash using error data.