PORTLAND, Ore.—A patient treated for agonizing abdominal pain received this surprising news in the hospital’s paperwork: “Based on your visit today, we know you are pregnant.”

Surprising indeed for 71-year-old John Grady Pippen.

The staff at Curry General Hospital in Gold Beach gave the retired mechanic and logger the ridiculously happy news this month, along with some pain pills. A hospital administrator says an errant keystroke caused the hospital’s computer to spit out the wrong instructions.