Award of "home run"

[BretMan]

My reading comprehension is just fine, thank you.

10.06 DETERMINING VALUE OF BASE HITS

The official scorer shall score a base hit as a one-base hit, two-base hit, three-base hit or home run when no error or putout results, as follows...

10.12 ERRORS...

(a) The official scorer shall charge an error against any fielder:

(1) whose misplay (fumble, muff or wild throw) prolongs the time at bat of a batter, prolongs the presence on the bases of a runner or permits a runner to advance one or more bases...

Says right there that you can't be credited with a home run if it was the result of an error.

Maybe Canseco wasn't charged with an error becasue the official scorer didn't judge a on the run, back to the infield, over the head, at the fence, catch attempt to be "ordinary effort".