I created a numerical question with the answer to be .5. A student entered .5 "amps" and received a penalty but then entered .5 "Amps" and received full credit. "Amps" was listed in the question as a legal unit with a multiplier of 1. This didn't seem like a big issue, so I tried to enter "amps" into the units field, also with a multiplier or 1, but I received a database error. I could still add units that weren't the same word, but I couldn't add the same unit with a different capitalization pattern.

Numerical Error 1 shows the student tried to put in .5 "amps" and received a penalty.

Numerical Error 2 shows the student entered .5 "Amps" and received full credit.

Numerical Error 3 shows me trying to add the "amps" to the units so that I could regrade and give full credit.

Numerical Error 4 shows the error I received when I tried to do that.

My understanding is that the units were supposed to be case insensitive.

Thanks!