Issue I470 [80,programming,lua,enhancement,resolved] Lua user programming. As of 8.0.0, user programs can be written in Lua scripting language (as well as PRG as in version 7.0). Lua programs can also call in C/C++ routines (see the "extension" example), operate on COM objects (e.g. Excel -- see the "excel" example), and call external programs (os.execute or io.popen). For details, see Appendix L. "User Programming" in the SIMION 8.0 user manual, as well as the many examples that make use of user programming. Furthermore, Lua commands can be entered into the bottom command-bar of the SIMION window. Lua batch mode programs can be run by clicking the "Run Lua Program" button on the SIMION main screen (see also Issue I130). You can also invoke the Lua interpreter as a command-line option ("simion.exe --nogui lua") as described in Appendix M "Command Line Interface"). See also Issue I404 - "Update Lua to latest 5.1.x release" Implemented in 8.0.0.