Summer 2001, Linkage v0.10: Initial Release Summer 2004, Linkage v0.11: * mlink.pl and linkmap.pl now output the results of each command on error. This allows a user to see why a program did not execute properly without running the scripts with the DEBUG option. * mlink.pl and linkmap.pl both contained a minor syntax error (using the "==" operator to compare two strings) which did not cause problems but did cause an unnecessary warning to be printed when the DEBUG option was used. * Linkage.pm will now parse marker files and pedigrees with only two loci. * README now contains the new locations of FASTLINK and LINKLODS.exe. * The Linkage Scripts are now released under the GPL license.