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Country file

The assignment of callsigns to their respective countries takes place with help of a so called country file. The default country file is cty.dat, but another file with the identical format can be used instead (e.g. the country file r150s.dat for the CQ-M contest which comes with LM; how to: see Header data dialog). Country files are stored within the LM-CountryFile directory, which can be accessed over the menu item "File | Show LM program data | Country files" easily.

The country files like cty.dat represent a standard which is used by most of the today's major contest software. Cty.dat updates are availiable on the website The country file update can be done comfortably using LM's Update option.

See also
LM file structure
Assignment tables
Header data dialog
Update options