Students are reporting an issue that I am unable to diagnose myself after looking at the problem code.
The second part of the library problem below asks for a slope-intercept equation and if a student uses the letter 'm' instead of the actual numerical value of the slope, they are getting the "There may be something wrong" warning, which is saying:
Use of uninitialized value $new_rh_ans_evaluation_result in
concatenation (.) or string at
/opt/webwork/pg/lib/WeBWorK/PG/Translator.pm line 1337
An example illustrating the issue, aka "Steps to reproduce":
Example correct answer for second part: y - 4 = (-1)*(x - 7)
Student enters: y - 4 = m*(x - 7)
The issue: The student gets the above warning
Expected behavior: Student should be getting the message "Variable 'm' is not defined in this context"
Here is the library problem:
## DBchapter(Linear equations and functions)
## DBsection(Equations of lines: general)
## Author(Alex Jordan, Carl Yao, Chris Hughes)
Our WeBWorK version is 2.14 and pg_version is PG-2.14.