play on walked batter

Question
12-U fastpitch tournament.  NSA rules.  However, umpire says following call is listed in IHSAA (Indiana High School) rulebook.  Please include where I can find ruling if possible.

Runner on third.  Batter is walked.  Catcher throws to first base; runner attempts to score and first baseman throws home.  Homeplate upmpire rules there was no play to be made on the batter, and awards a ball to next batter up.

Answer
Hi Donna,

I'm not an NSA or IHSAA umpire

Under ASA it would not apply when the batter becomes a batter-runner or there are runners on base.

Again I am not a NSA or IHSAA umpire but I checked and NSA's rule appears to be almost the same as ASA.  NFHS states it must be to make a play on a runner.  So it probably is listed in IHSAA and under those rules the correct call.

Mark