Back in the late 60s when I was a student at Purdue, a dorm buddy asked if I could pick up a printout of a program he submitted at the computer center, since I walked by it on the way to one of my classes.
Went it went to his cubby hole where the printouts and punch cards were placed, and there was a note to see the operator. Uh oh!
Went in and gave him the note, told hime i was picking it up for Rick, and he pulled out a stack of printout paper about an inch thick, and said he had a flaw in the Fortran program logic that caused a repetitive loop. He was not amused. Rick found the error and the next time, the printout all fit on one page.