654.4  Separate suits on note and mortgage.
  If separate actions are brought in the same county on the bond or note, and on the mortgage given to secure it, the plaintiff must elect which to prosecute. The other will be discontinued at the plaintiff’s cost.
[C51, §2086; R60, §3663; C73, §3320; C97, §4288; C24, 27, 31, 35, 39, §12375; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §654.4]
Action on certain judgments prohibited, chapter 615 
Related provision, §611.5