Hi,

I had a student who claims he submitted an answer and didn't get credit for
it.  This happened during a quiz so he didn't get the problem status, or a
receipt, at the time of the submission.  In looking through the activity
file I see something that I don't understand and was wondering if it was
somehow related.

The problem has 4 parts.  The 2nd part is a radiobuttonresponse and it is
the one that the student claims to have answered.  In the activity log
excerpt below, the 2nd part is HWVAL_14.

The thing that I don't understand is that HWVAL_14 doesn't show up in the
POST on line 469 for the 1st part like the other parts do.  Then it shows
up on line 468 with a value.  Line 468 is a POST for the 3rd part as
indicated by the submission in the CSTORE on line 467.  Then on line 465,
the POST for the 4th part, HWVAL_14 is missing again.

Looking at the issue of not getting credit for the submission, did he click
on a radio button but not the submit button for that part (the 2nd part).
Then when he submitted his answer for the 3rd part, the 2nd part POST'ed
too but lon-capa didn't grade it since the submit was not for the 3rd
part.  That seems reasonable.

Is there an explanation for the line HWVAL_14 appearing and disappearing?
I thought maybe the activity log might be corrupt but grading
indicates "Nothing
submitted - no attempts."

Are these 2 things related?

ACTIVITY LOG:

465     Question 2  2016-10-06 20:23:46  POST
HWVAL_12 = .0045 M
HWVAL_16 = 26.56 g
HWVAL_18 = .282 L
submitted = part_17
symb = uploaded/binghamton/7i6759115966957b9binghamtonl1/default_
141406948640900531475249776.sequence___32___sfu/batchelo/
chem111/problems/lecture/set7/M.mass.vol.relations.problem
466    Question 2  2016-10-06 20:23:46  CSTORE
host = binghamtona2
ip = 149.125.81.232
resource.17.18.answername = INTERNAL
resource.17.18.awarddetail = APPROX_ANS
resource.17.18.awardmsg =
resource.17.18.submission = .282 L
resource.17.award = APPROX_ANS
resource.17.awarded = 1
resource.17.awardmsg =
resource.17.duedate = 1475803800
resource.17.hinttries = 1
resource.17.maxtries = 3
resource.17.rndseed = 644052659:1049734531
resource.17.solved = correct_by_student
resource.17.tries = 1
resource.17.type = problem
resource.17.version =

467    Question 2  2016-10-06 20:21:05  CSTORE
host = binghamtona2
ip = 149.125.81.232
resource.15.16.answername = INTERNAL
resource.15.16.awarddetail = APPROX_ANS
resource.15.16.awardmsg =
resource.15.16.submission = 26.56 g
resource.15.award = APPROX_ANS
resource.15.awarded = 1
resource.15.awardmsg =
resource.15.duedate = 1475803800
resource.15.hinttries = 1
resource.15.maxtries = 3
resource.15.rndseed = 644052659:1049734531
resource.15.solved = correct_by_student
resource.15.tries = 1
resource.15.type = problem
resource.15.version =

468 Question 2  2016-10-06 20:21:01  POST
HWVAL_12 = .0045 M
HWVAL_14 = 0.593069306930693
HWVAL_16 = 26.56 g
HWVAL_18 =
submitted = part_15
symb = uploaded/binghamton/7i6759115966957b9binghamtonl1/default_
141406948640900531475249776.sequence___32___sfu/batchelo/
chem111/problems/lecture/set7/M.mass.vol.relations.problem
469  Question 2  2016-10-06 20:16:47  POST
HWVAL_12 = .0045 M
HWVAL_16 =
HWVAL_18 =
submitted = part_11
symb = uploaded/binghamton/7i6759115966957b9binghamtonl1/default_
141406948640900531475249776.sequence___32___sfu/batchelo/
chem111/problems/lecture/set7/M.mass.vol.relations.problem
470 Question 2   2016-10-06 20:16:47  CSTORE
host = binghamtona2
ip = 149.125.81.232
resource.11.12.answername = INTERNAL
resource.11.12.awarddetail = APPROX_ANS
resource.11.12.awardmsg =
resource.11.12.submission = .0045 M
resource.11.award = APPROX_ANS
resource.11.awarded = 1
resource.11.awardmsg =
resource.11.duedate = 1475803800
resource.11.hinttries = 1
resource.11.maxtries = 3
resource.11.rndseed = 644052659:1049734531
resource.11.solved = correct_by_student
resource.11.tries = 1
resource.11.type = problem
resource.11.version =

471    Question 2  2016-10-06 20:15:10   POST
symb=uploaded/binghamton/7i6759115966957b9binghamtonl1/default_
141406948640900531475249776.sequence___32___sfu/batchelo/
chem111/problems/lecture/set7/M.mass.vol.relations.problem

Thanks,
Bob Gonzales
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