## WeBWorK error

An error occured while processing your request. For help, please send mail to this site's webmaster (sean.fitzpatrick@uleth.ca), including all of the following information as well as what what you were doing when the error occured.

Tue Oct 01 18:43:49 2019

### Error messages

DBD::mysql::st execute failed: Incorrect string value: '\xA4\frac...' for column 'last_answer' at row 1 at /opt/webwork/webwork2/lib/WeBWorK/DB/Schema/NewSQL/Std.pm line 837. 

### Call stack

The information below can help locate the source of the problem.

• in WeBWorK::DB::Schema::NewSQL::Std::handle_error called at line 575 of /opt/webwork/webwork2/lib/WeBWorK/DB/Schema/NewSQL/Std.pm
• in WeBWorK::DB::Schema::NewSQL::Std::update_fields_i called at line 604 of /opt/webwork/webwork2/lib/WeBWorK/DB/Schema/NewSQL/Std.pm
• in WeBWorK::DB::Schema::NewSQL::Std::update_records called at line 758 of /opt/webwork/webwork2/lib/WeBWorK/DB/Schema/NewSQL/Std.pm
• in WeBWorK::DB::Schema::NewSQL::Std::put called at line 2092 of /opt/webwork/webwork2/lib/WeBWorK/DB.pm
• in WeBWorK::DB::putUserProblem called at line 227 of /opt/webwork/webwork2/lib/WeBWorK/ContentGenerator/ProblemUtil/ProblemUtil.pm
• in WeBWorK::ContentGenerator::ProblemUtil::ProblemUtil::process_and_log_answer called at line 792 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 384 of /opt/webwork/webwork2/lib/WeBWorK.pm

### Request information

MethodPOST
URI/webwork2/Math-1560AB-Fall-2019/05_Derivative_Rules/4/