If I go to "Advanced Search" and select a textbook, then I get the following error:

`DBD::mysql::db selectall_arrayref failed: Incorrect table name '' at /opt/webwork/webwork2/lib/WeBWorK/Utils/ListingDB.pm line 381.`

`I've only tried three textbooks, but I get this error with all three of them, so I suspect with any choice of text. If I just choose "Subject", "Chapter" and "Section" without specifying a textbook, I don't get this error.`

`This is with WeBWorK 2.5.1.1 and having run OPL-update on Friday. This is a new installation - we haven't taught from it yet, though plan on doing so in January.`

`(I'm getting another set of issues, that appear unrelated and I posted about them on the Problems and Problem Librares Forum. But just in case it is related, here is the link:`

`http://webwork.maa.org/moodle/mod/forum/discuss.php?d=2846 )`

`thanks for any help,`

`Hal`

`The call stack is:`

`in WeBWorK::Utils::ListingDB::getDBListings called at line 399 of /opt/webwork/webwork2/lib/WeBWorK/Utils/ListingDB.pm`

`in WeBWorK::Utils::ListingDB::countDBListings called at line 614 of /opt/webwork/webwork2/lib/WeBWorK/ContentGenerator/Instructor/SetMaker.pm`

`in WeBWorK::ContentGenerator::Instructor::SetMaker::browse_library_panel2adv called at line 431 of /opt/webwork/webwork2/lib/WeBWorK/ContentGenerator/Instructor/SetMaker.pm`

`in WeBWorK::ContentGenerator::Instructor::SetMaker::browse_library_panel called at line 799 of /opt/webwork/webwork2/lib/WeBWorK/ContentGenerator/Instructor/SetMaker.pm`

`in WeBWorK::ContentGenerator::Instructor::SetMaker::make_top_row called at line 1374 of /opt/webwork/webwork2/lib/WeBWorK/ContentGenerator/Instructor/SetMaker.pm`

`in WeBWorK::ContentGenerator::Instructor::SetMaker::body called at line 152 of /opt/webwork/webwork2/lib/WeBWorK/Template.pm`

`in WeBWorK::Template::template called at line 496 of /opt/webwork/webwork2/lib/WeBWorK/ContentGenerator.pm`

`in WeBWorK::ContentGenerator::content called at line 200 of /opt/webwork/webwork2/lib/WeBWorK/ContentGenerator.pm`

`in WeBWorK::ContentGenerator::go called at line 371 of /opt/webwork/webwork2/lib/WeBWorK.pm`