Send any bug reports to firstname.lastname@example.org. There is certain information that will greatly aid in diagnosing the problem. The QTL Cartographer distribution should come with a file called problems.txt with the following questions in it:
When reporting a problem, try to include the answers to all of the questions above. Some of them may not be relevant for you particular case and can be ignored. Email is generally the best way to report problems as the messages stay on a queue until they are dealt with.
One of the most difficult steps in using the QTL Cartographer system is to reformat datasets. Question 2(c) above asks whether you would be willing to send us your data in order to diagnose a problem. We would like to emphasize that if you send us your data files, they will be kept in the strictest confidence and deleted upon your request. If you have published data sets and would like to make them available for the scientific community, we would be happy to put them on our ftp server.