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There are log files with full records in your 'database' directory, which by default is install_dir/db, but if you hit file->open in the client, it can take you straight to it. They are called 'client - year-month.log'.
Scroll down to the bottom of the log to see the latest messages. If you ctrl+f for 'traceback' (maybe 'up' from the bottom), that may help you find the error.