Hey @NicoLehmann,
In the Output tool you do have the option to select a field to append the Name from. Select the field there.
hi @NicoLehmann
First, create fila path by Formula tool with expression like "\\machin001\\yourfolder\"+[BOM_HEADER]+".csv".
And check option of "Take FIle/Table Name Field" in output tool, and select option "Change Entire File Path", and specify the filed name you created in Formula tool, then you can dynamically change output file path.