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Wed Jun 07 17:27:35 2017
Can't locate object method "response_obj" via package "PGanswergroup" at /opt/webwork/webwork2/lib/WeBWorK/ContentGenerator/ProblemUtil/ProblemUtil.pm line 145.
The information below can help locate the source of the problem.
in WeBWorK::ContentGenerator::ProblemUtil::ProblemUtil::process_and_log_answer called at line 765 of /opt/webwork/webwork2/lib/WeBWorK/ContentGenerator/Problem.pm
in WeBWorK::ContentGenerator::Problem::pre_header_initialize called at line 214 of /opt/webwork/webwork2/lib/WeBWorK/ContentGenerator.pm
in WeBWorK::ContentGenerator::go called at line 382 of /opt/webwork/webwork2/lib/WeBWorK.pm