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Error rendering pathway page

This revision of the pathway probably contains invalid GPML code. If this happens to the most recent revision, try reverting the pathway using the pathway history displayed below or contact the site administrators (see WikiPathways:About) to resolve this problem.

Pathway history

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Compare	Revision	Action	Time	User	Comment
	106122	view	12:02, 16 August 2019	MaintBot	HMDB identifier normalization
	81022	view	13:06, 11 July 2015	Egonw	Removed an empty reference.
	74440	view	07:14, 20 April 2014	Egonw	Completed a few PubMed IDs with title, authors, etc.
	74439	view	07:05, 20 April 2014	Egonw	Fixed a PubMed ID.
	74235	view	06:53, 9 April 2014	Egonw	Removed a data source where no ID was given.
	74231	view	16:28, 8 April 2014	Egonw	Removed a data source where no ID was given.
	71186	view	15:43, 11 October 2013	Egonw	Removed source details from the pathway title.
	68879	view	17:22, 8 July 2013	MaintBot	Updated to 2013 gpml schema
	67629	view	11:35, 26 June 2013	Ddigles	Ontology Term : 'retinol metabolic pathway' added !
	56483	view	08:37, 8 January 2013	Egonw	Replaced data source 'hmdbid' with 'HMDB'.
	47782	view	05:54, 6 April 2012	Khanspers	updated xref
	41021	view	22:57, 1 March 2011	MaintBot	Removed redundant pathway information and comments
	33942	view	18:14, 9 December 2009	MaintBot	Automatic update of empty xrefs
	32773	view	18:35, 4 September 2009	MaintBot	Modified categories
	30374	view	20:59, 29 July 2009	MaintBot	New pathway

Error details

exception 'MWException' with message 'Invalid pvjson, so cannot savePvjsonCache.' in /var/www/wikipathways/wpi/extensions/Pathways/Pathway.php:1277
Stack trace:
#0 /var/www/wikipathways/wpi/extensions/Pathways/Pathway.php(584): Pathway->savePvjsonCache()
#1 /var/www/wikipathways/wpi/extensions/Pathways/PathwayPage.php(295): Pathway->getPvjson()
#2 /var/www/wikipathways/wpi/extensions/Pathways/PathwayPage.php(169): PathwayPage->Diagram()
#3 /var/www/wikipathways/wpi/extensions/Pathways/PathwayPage.php(24): PathwayPage->render()
#4 [internal function]: renderPathwayPage(Object(Parser), '<?xml version="...', Object(StripState))
#5 /var/www/wikipathways/includes/Hooks.php(125): call_user_func_array('renderPathwayPa...', Array)
#6 /var/www/wikipathways/includes/parser/Parser.php(318): wfRunHooks('ParserBeforeStr...', Array)
#7 /var/www/wikipathways/includes/Article.php(3406): Parser->parse('<?xml version="...', Object(Title), Object(ParserOptions), true, true, 30374)
#8 /var/www/wikipathways/includes/Article.php(875): Article->outputWikiText('<?xml version="...', false)
#9 /var/www/wikipathways/includes/Wiki.php(437): Article->view()
#10 /var/www/wikipathways/includes/Wiki.php(59): MediaWiki->performAction(Object(OutputPage), Object(Article), Object(Title), Object(User), Object(WebRequest))
#11 /var/www/wikipathways/index.php(93): MediaWiki->initialize(Object(Title), Object(Article), Object(OutputPage), Object(User), Object(WebRequest))
#12 {main}