Brazil’s much vaunted attempt at creating a nationwide university entrance exam is in disarray today after the test was beset by problems for the second straight year.

A judge last night ruled the exam results be annulled after 2,000 or so of the 3.7 million papers were printed with mistakes.

The erroneous multiple choice papers had Human Sciences questions numbered 1-45 and Natural Sciences numbered from 46-90 but the results paper had the categories inverted. Exacerbating the confusion, adjudicators gave students different orders about how to fill in the answers.

The error came a year after the test had to be rewritten when questions were leaked. Earlier this year a computer glitch made the personal data of millions of students available online.

The Enem, as it is known, was revamped two years ago as I explained in this blog and in this longer piece for the Chronicle of Higher Education. The new test was supposed to make it easier and cheaper for both students and universities as well as bring Brazil more into line with a national entrance system like that used in the US and most European countries.