Doug, As all of the SERVICE BUREAU types are reeling from your question...I too can agree with the responses I have seen so far. Our dept. has had similar problems with the PCAD/ORCAD interface, and the fact that all engineers will have their package of preference. I can give you a comparison of a PCAD/OrCAD situation that may help in the future. Orcad (if that's the tool yer using) will randomly rename all nets from different edit sessions from NETLIST extraction to NETLIST extraction. The only way to ensure that this is nailed down is to REQUIRE the engineer to name all of his NETS (manual process unfortunately). Hopefully, your tool can then extract the current netlist, as well as the new supplied netlist, and then compare those two lists (in pcad we "package" the netlist two a blank board, and then compare the old revision PCB to the NEW revision PCB, and compare the differences that the program comes up with). This process could also be done with some basic C++ code. Hope this comparison helps. Les Beller Echostar. [log in to unmask] **************************************************************************** * The mail list is provided as a service by IPC using SmartList v3.05 * **************************************************************************** * To unsubscribe from this list at any time, send a message to: * * [log in to unmask] with <subject: unsubscribe> and no text. * ****************************************************************************