MediaWiki internal error.

Original exception: exception 'DBUnexpectedError' with message 'Unable to free MySQL result' in /home/encyclopedia/public_html/w/includes/db/Database.php:769
Stack trace:
#0 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/storage/SMW_SQLStore2.php(710): Database->freeResult(false)
#1 /home/encyclopedia/public_html/w/extensions/SemanticForms/includes/SF_LinkUtils.inc(224): SMWSQLStore2->getInProperties(Object(SMWWikiPageValue))
#2 /home/encyclopedia/public_html/w/extensions/SemanticForms/includes/SF_LinkUtils.inc(209): SFLinkUtils::addDataLink(Object(Title))
#3 [internal function]: SFLinkUtils::setBrokenLink(Object(SkinMonoBook), Object(Title), Array, 'A Norcott (c63a...', Array, NULL)
#4 /home/encyclopedia/public_html/w/includes/Hooks.php(117): call_user_func_array(Array, Array)
#5 /home/encyclopedia/public_html/w/includes/Linker.php(222): wfRunHooks('LinkEnd', Array)
#6 /home/encyclopedia/public_html/w/includes/Linker.php(445): Linker->link(Object(Title), 'A Norcott (c63a...', Array, Array)
#7 /home/encyclopedia/public_html/w/includes/Linker.php(339): Linker->makeLinkObj(Object(Title), 'A Norcott (c63a...', '', '')
#8 /home/encyclopedia/public_html/w/includes/Linker.php(1339): Linker->makeLink('A Norcott (c63a...', 'A Norcott (c63a...', '', '')
#9 [internal function]: Linker->formatLinksInCommentCallback(Array)
#10 /home/encyclopedia/public_html/w/includes/Linker.php(1302): preg_replace_callback('/\[\[:?(.*?)(\|...', Array, 'moved [[A Norco...')
#11 /home/encyclopedia/public_html/w/includes/Linker.php(1211): Linker->formatLinksInComment('moved [[A Norco...')
#12 /home/encyclopedia/public_html/w/includes/Linker.php(1363): Linker->formatComment('moved [[A Norco...', Object(Title), true)
#13 /home/encyclopedia/public_html/w/includes/Linker.php(1382): Linker->commentBlock('moved [[A Norco...', Object(Title), true)
#14 /home/encyclopedia/public_html/w/includes/diff/DifferenceEngine.php(283): Linker->revComment(Object(Revision), true, true)
#15 /home/encyclopedia/public_html/w/includes/Article.php(806): DifferenceEngine->showDiffPage(false)
#16 /home/encyclopedia/public_html/w/includes/Wiki.php(450): Article->view()
#17 /home/encyclopedia/public_html/w/includes/Wiki.php(63): MediaWiki->performAction(Object(OutputPage), Object(Article), Object(Title), Object(User), Object(WebRequest))
#18 /home/encyclopedia/public_html/w/index.php(118): MediaWiki->initialize(Object(Title), Object(Article), Object(OutputPage), Object(User), Object(WebRequest))
#19 {main}

Exception caught inside exception handler: exception 'DBUnexpectedError' with message 'Unable to free MySQL result' in /home/encyclopedia/public_html/w/includes/db/Database.php:769
Stack trace:
#0 /home/encyclopedia/public_html/w/extensions/SemanticForms/includes/SF_LinkUtils.inc(270): Database->freeResult(false)
#1 /home/encyclopedia/public_html/w/extensions/SemanticForms/includes/SF_LinkUtils.inc(280): SFLinkUtils::getCategoriesForArticle(Object(SkinMonoBook))
#2 /home/encyclopedia/public_html/w/extensions/SemanticForms/includes/SF_FormEditTab.php(25): SFLinkUtils::getFormForArticle(Object(SkinMonoBook))
#3 [internal function]: SFFormEditTab::displayTab(Object(SkinMonoBook), Array)
#4 /home/encyclopedia/public_html/w/includes/Hooks.php(117): call_user_func_array(Array, Array)
#5 /home/encyclopedia/public_html/w/includes/SkinTemplate.php(804): wfRunHooks('SkinTemplateTab...', Array)
#6 /home/encyclopedia/public_html/w/includes/SkinTemplate.php(437): SkinTemplate->buildContentActionUrls()
#7 /home/encyclopedia/public_html/w/includes/OutputPage.php(968): SkinTemplate->outputPage(Object(OutputPage))
#8 /home/encyclopedia/public_html/w/includes/Exception.php(159): OutputPage->output()
#9 /home/encyclopedia/public_html/w/includes/Exception.php(186): MWException->reportHTML()
#10 /home/encyclopedia/public_html/w/includes/Exception.php(284): MWException->report()
#11 /home/encyclopedia/public_html/w/includes/Exception.php(344): wfReportException(Object(DBUnexpectedError))
#12 [internal function]: wfExceptionHandler(Object(DBUnexpectedError))
#13 {main}