canon EOS 50D. i keep getting a code 50 error, it sounds like my shutter is locking up, help

[TCampbell]

The error code isn't specific other than it's "internal" to the camera (unlikely to be a problem with the lens, memory card, etc.)

See Canon's list of errors here:  http://www.learn.usa.canon.com/resources/articles/2012/eos_error_msgs.shtml