I look inside my vng.sil File (with the SILEditor) and I found a unit with I removed from my project, why does TsiLang not remove this unit from the File ? (in the TsiLang-Expert the removed unit was not listet!)
Because TsiLang when writing to SIL files writes and updates only information related to its own form/unit and doesn't touch any others in order to allow to save multiple forms into ine SIL file. You can just remove unused entries manually from SIL file.