** Using WeBWorK **

Argument "" isn't numeric in addition (+) at /local/webwork2/lib/WeBWorK/ContentGenerator/ProblemSets.pm line 293.

We're running Webwork 2.1.3 - epsilon.

-Tom

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I probably have a slightly different file than you do -- there is nothing at ProblemSets.pm line 293 which would cause this problem. At line 283 there is a formatDateTime call which might generate an error like this.

Let us know what you find out.

-- Mike

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Thanks for the suggestion. By overriding the course due dates for that student with the same dates, I was able to make the error disappear for that student.

However, two more students have just emailed me with the same error on different problems (We had our first assignment given out today).

Here's the specific details on those students.

We get the same error message for lines 155, 977 of

/local/webwork2/lib/WeBWorK/ContentGenerator/Problem.pm

We are running the CVS version 1.170 of Problem.pm

We also get the same error message for line 359 of

/local/webwork2/lib/WeBWorK/ContentGenerator/ProblemSet.pm

We running CVS version 1.61 of ProblemSet.pm.

For both of those files, the relevant code seems to be

my $attempts = $problem->num_correct + $problem->num_incorrect;

so it looks like somehow that num_correct or num_incorrect isn't being set. At least, that's my guess.

-Tom

ps. We are running Webwork 2.1.3 (no epsilon as in the last post)

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select distinct num_correct, num_incorrect from Zhu_MAT_210_Fall_2005_problem_user;

+-------------+---------------+
| num_correct | num_incorrect |
+-------------+---------------+
|           0 |             0 |
|           1 |             0 |
|           2 |             0 |
|           1 |             1 |
|           1 |             5 |
|           1 |             9 |
|           0 |             2 |
|           0 |             3 |
|           1 |            17 |
|           1 |             4 |
|           1 |             3 |
|           0 |             1 |
|           1 |             2 |
|           0 |             4 |
|           3 |             0 |
+-------------+---------------+

So, the first thing to do would be to try to emulate this (if you are using sql_single, it might be just a matter of entering your course name).

John

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Instructor Tools/Homework_sets_Editor/Set_Detail for set xxx

I typed in "User Values" for the dates when the problem set

"Opens", "Answers Due", and "Answers Available".

I also checked the boxes to the left of those choices.

When I clicked "Save Changes", the screen comes back with my values only in the "Opens" Window. The other two windows then default back to the

12/31/1969 at 07:00pm EST

default time.

Any ideas?

-Tom -Tom

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