Hi there, just browsed through the tuple's doc and I think we need to update the Portability section: This is what it's now: Portability The library code is(?) standard C++ and thus the library works with a standard conforming compiler. Below is a list of compilers and known problems with each compiler: Compiler Problems gcc 2.95 - edg 2.44 - Borland 5.5 Can't use function pointers or member pointers as tuple elements Metrowerks 6.2 Can't use ref and cref wrappers MS Visual C++ No reference elements (tie still works). Can't use ref and cref wrappers I'm using the MS VC 7.1 compiler and for this the statement is simply not true anymore. I hope not too many people got turned off by this message. Christian