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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
	116978	view	10:42, 16 May 2021	Eweitz	Modified title
	107007	view	13:46, 17 September 2019	MaintBot	HMDB identifier normalization
	89925	view	13:34, 6 October 2016	Mkutmon	Modified description
	71829	view	19:35, 18 October 2013	MaintBot	removed data source from nodes without identifier
	70694	view	14:40, 28 August 2013	Egonw	Added more ChemSpider IDs for metabolites previously only available as Label.
	70005	view	23:32, 11 July 2013	MaintBot	updated to 2013 schema
	67336	view	10:39, 26 June 2013	Christine Chichester	Ontology Term : 'heme biosynthetic pathway' added !
	41679	view	02:36, 2 March 2011	MaintBot	Removed redundant pathway information and comments
	35288	view	22:50, 11 February 2010	Mills42	Modified description
	34069	view	19:09, 9 December 2009	MaintBot	Automatic update of empty xrefs
	33527	view	09:33, 1 December 2009	MaintBot	Removed group label
	30916	view	00:32, 30 July 2009	MaintBot	Converted from Homo sapiens
	20861	view	11:30, 14 November 2008	MaintBot	[[Pathway:Rattus norvegicus:Heme Biosynthesis]] moved to [[Pathway:WP86]]: Moved to stable identifier
	8136	view	13:46, 7 January 2008	MaintBot	[[Pathway:Rat:Heme Biosynthesis]] moved to [[Pathway:Rattus norvegicus:Heme Biosynthesis]]: Renaming species
	7689	view	16:09, 18 December 2007	MaintBot	fixed category names
	7374	view	12:42, 4 November 2007	MaintBot	Added categories to GPML
	6556	view	22:20, 22 May 2007	Kdahlquist	gpml file for [[Rat:Heme_Biosynthesis]]

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, 30916)
#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}