EXP Database Error Messages EXP-00004: invalid username or password August 18, 2015 mpbod EXP-00004: invalid username or password Cause: An invalid username or password was specified. Action: Retry with a valid username and password. Back to previous menu Share this:Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)