Hello, the following PlainTeX document results in an error message about kpse not being initialized: ------------------------------------------------------------------------ -- % \directlua0{kpse.set_program_name('tex')} % A \directlua0{kpse.find_file('foo', 'tex')} \end ------------------------------------------------------------------------ --- jonathansauer$ luatex kpseTest.tex This is LuaTeX, Version snapshot-0.22.0-2008021518 (Web2C 7.5.6) (kpseTest.tex ! LuaTeX error Please call kpse.set_program_name() before using the library. l.2 \directlua0{kpse.find_file('foo', 'tex')} ? x No pages of output. Transcript written on . ------------------------------------------------------------------------ --- - According to section 4.9 of the manual, kpse's database is automatically initialized when LuaTeX is used to typeset documents. - The name of the transcript file is empty (even though the transcript is written to 'kpseTest.log'). After uncommenting line A above, no error is generated, and the name of the transcript file printed is not empty anymore: ------------------------------------------------------------------------ --- jonathansauer$ luatex kpseTest.tex This is LuaTeX, Version snapshot-0.22.0-2008021518 (Web2C 7.5.6) (kpseTest.tex ) No pages of output. Transcript written on kpseTest.log. ------------------------------------------------------------------------ --- I looked into the source, and the reason for this behaviour seems to be that 'init_kpse' ('luainit.c') calls 'kpse_set_program_name', but does not set 'program_name_set' ('lkpselib.c') to 1. This is only done by 'set_program_name', which is the C function called by 'kpse.set_program_name'. My modifications to fix this: lkpselib.c line 119: - static int program_name_set = 0; + int program_name_set = 0; luainit.c line 63: - extern int last_lineno; + extern int last_lineno; + extern int program_name_set; line 353: - kpse_set_program_name(argv[0], user_progname); + program_name_set = 1; + kpse_set_program_name(argv[0], user_progname); (BTW: Is there a way to speed up compilation of LuaTeX after making small changes such as these? The build script seems to always recompile everything) I did not find the reason for the missing log file name. Furthermore, I tried to set the program name using '--progname' and got: ------------------------------------------------------------------------ --- jonathansauer$ luatex --progname=luatex kpseTest Abort trap ------------------------------------------------------------------------ --- The reason for this seems to lie in file 'luainit.c', function 'init_kpse', where 'dump_name' is only initialized with the name of the executable when 'user_progname' has not been set (and if LuaTeX is not in IniTeX mode) [BTW: The casts to 'string' in the function are not necessary (anymore?)]. Specifying the format as well using '--fmt' resulted in the message I got the first time. Jonathan