So what is an "error?
"
An error is a play in which, in the opinion of the official scorer, a batter got on base or took an extra base due to a miscue on the part of a fielder.
For instance, if an outfielder drops a catchable fly ball, it’s an error; if an infielder throws the ball away, it’s also an error. The scorer has to decide if the fielder really could have caught the ball (if you leap for a home run and it ticks off the top of your glove, it’s not scored as an error) and if the mistake would have made a difference (if the first baseman drops the ball, but it arrives after the runner touches the bag, it’s not usually scored as an error). Errors aren’t usually scored if the player misses a fly ball completely, though it can happen.
Obviously, there’s a lot of room for interpretation.
Re: No hitters. If you pitch nine innings and don’t allow a hit, it’s considered a no-hitter, no matter if runs were scored. The Sporting News currently lists several no hit games where runs were scored. Games where the pitcher threw a nine-inning no hitter but gave up a hit in extra innings are listed in the record books, but in a separate category.
What were eliminated was a handful of pitchers who lost without giving up a hit, but who only pitched 8 innings. T
The idea was the define a no-hitter as nine no-hit innings. Official lists still include Ken Johnson’s no-hit loss for the Astros and Steve Barber and Stu Miller losing a no-hit game to Detroit.
Not so. Alex Johnson tripled for the only hit, and scored on a sacrifice fly. If the Cubs made an error, it had nothing to do with the run. The game, of course, had the fewest number of hits in major league history.
Well, that’s close on Koufax’s game, except there are several mistakes.
The only hit was by LOU Johnson, not Alex Johnson. And it was a double in the 7th inning that didn’t figure in the scoring.
The Cubs’ only run came in the fifth, when Hendley walked Johnson. Ron Fairly bunted him to second. Johnson then stole third and scored when catcher Chris Krug’s throw went into left field, for an ERROR.
There was an interview with Bob Hendley in the 9/5/99 Atlanta Journal-Constitution which recounted the game.
Thank you, BobT. I remembered on the way home last night that what I saw was a double SHUT-OUT, not a double no-hitter. Not nearly as rare, but still memorable.
What also stood out was the class of the fans in attendance. Realizing that Gardner had pitched a no-hitter, we all applauded him. It was almost a shame he lost.
Almost. 
Little did we know what would happen on Sunday…
Those who do not learn from the past are condemned to relive it. Georges Santayana