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(1963): Database->freeResult(false)
#1 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/storage/SMW_SQLStore2.php(1888): SMWSQLStore2->getSMWPageIDandSort('Early_baseball_...', '0', '', '', true)
#2 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/storage/SMW_SQLStore2.php(158): SMWSQLStore2->getSMWPageID('Early_baseball_...', '0', '')
#3 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/storage/SMW_SQLStore2.php(233): SMWSQLStore2->getSemanticData(Object(SMWWikiPageValue), Array)
#4 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/articlepages/SMW_PropertyPage.php(144): SMWSQLStore2->getPropertyValues(Object(SMWWikiPageValue), Object(SMWPropertyValue), Object(SMWRequestOptions))
#5 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/articlepages/SMW_PropertyPage.php(102): SMWPropertyPage->subjectObjectList()
#6 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/articlepages/SMW_OrderedListPage.php(79): SMWPropertyPage->getPages()
#7 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/articlepages/SMW_OrderedListPage.php(55): SMWOrderedListPage->getHTML()
#8 /home/encyclopedia/public_html/w/extensions/SemanticMediaWiki/includes/articlepages/SMW_OrderedListPage.php(43): SMWOrderedListPage->showList()
#9 /home/encyclopedia/public_html/w/includes/Wiki.php(450): SMWOrderedListPage->view()
#10 /home/encyclopedia/public_html/w/includes/Wiki.php(63): MediaWiki->performAction(Object(OutputPage), Object(SMWPropertyPage), Object(Title), Object(User), Object(WebRequest))
#11 /home/encyclopedia/public_html/w/index.php(118): MediaWiki->initialize(Object(Title), Object(SMWPropertyPage), Object(OutputPage), Object(User), Object(WebRequest))
#12 {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}