Hello everyone - I have quite a bit of Metapost code for custom symbols. Rather than repeat several hundred lines in every layout/endlayout pair, I would like to put the code in its own file and then <include> that file in the thconfig file. How is that done? I tried using both "input sourcefile" and "source sourcefile". The same error comes up for both. Text below. According to the Therion Book, the only valid place for code/endcode pairs is inside a layout/endlayout pair. Is that true? Thanks - Bill Gee ============= therion 5.3.13 initialization file: /usr/local/etc/therion.ini reading ... done configuration file: thconfig reading ... therion: error -- thconfig [14] -- thconfig [14] -- unknown option -- input CustomSymbolsCode.txt writing xtherion file ... done therion 5.3.13 initialization file: /usr/local/etc/therion.ini reading ... done configuration file: thconfig reading ... therion: error -- thconfig [14] -- thconfig [14] -- unknown option -- source CustomSymbolsCode.txt writing xtherion file ... done