reporting into different files with one report

Hi, i need to report data into three different files simultaneously. The format is the same for all three files. I don't want to make three copies of the report which are opened with different file names. Any idea? I tried with the REPORT TO variable statement in the report itself and "variable" was a report parameter with the filename to report to. But all data goes into the file passed first to the report. Later changes in the parameter have no effect. Greetings, Joerg