That's correct, you need some sort of wrapper code to call the C API from Tcl. It's quite an extensive interface too. I don't think that any such package exists in a ready-to-use form at present. The wrapper code that we use for testing sessions is here: (http://www.sqlite.org/src/artifact/f433f68a8a8c6) It might be useful if you decide to develop a sessions wrapper yourself. Or if you just want to extract some functions to call the parts of sessions your app needs. Dan.