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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
	118480	view	05:45, 28 May 2021	Egonw	Replaced UniGene with Ensembl IDs
	116893	view	11:20, 15 May 2021	Eweitz	Modified title
	95702	view	19:56, 18 January 2018	AlexanderPico	fixed xref
	95700	view	19:55, 18 January 2018	AlexanderPico	fixed xref
	95699	view	19:54, 18 January 2018	AlexanderPico	fixed xref
	95698	view	19:53, 18 January 2018	AlexanderPico	updated retired unigene id
	95697	view	19:51, 18 January 2018	AlexanderPico	fixed xref
	95696	view	19:49, 18 January 2018	AlexanderPico	fixed xref
	95692	view	19:48, 18 January 2018	AlexanderPico	fixed xref
	95691	view	19:47, 18 January 2018	AlexanderPico	fixed xref
	95690	view	19:45, 18 January 2018	AlexanderPico	fixed xref
	95689	view	19:43, 18 January 2018	AlexanderPico	fixed xref
	95688	view	19:41, 18 January 2018	AlexanderPico	fixed xref
	95687	view	19:38, 18 January 2018	AlexanderPico	Removed stray characters and updated xref
	95686	view	19:31, 18 January 2018	AlexanderPico	updated retired entrez id
	95685	view	19:26, 18 January 2018	AlexanderPico	updated retired unigene ids
	71978	view	00:27, 24 October 2013	MaintBot	removed data source from nodes without identifier
	70244	view	21:32, 15 July 2013	MaintBot	upated to 2013 schema
	70193	view	01:59, 13 July 2013	AlexanderPico	Modified title
	67512	view	11:19, 26 June 2013	Ddigles	Ontology Term : 'Nodal signaling pathway' added !
	58800	view	22:53, 20 February 2013	MaintBot	Updated Ensembl data source
	52980	view	11:41, 25 October 2012	Fredp	added lft1/antivin with correct mapping
	40857	view	22:20, 1 March 2011	MaintBot	Removed redundant pathway information and comments
	34975	view	09:01, 9 February 2010	Danio368	correct ectoderm to endoderm
	29185	view	18:26, 9 April 2009	Khanspers	Changes pathway name: removed "zebrafish"
	21395	view	11:31, 14 November 2008	MaintBot	[[Pathway:Danio rerio:Nodal Signaling]] moved to [[Pathway:WP341]]: Moved to stable identifier
	16296	view	20:44, 17 June 2008	Khanspers	[[Pathway:Danio rerio:Dr Nodal-signaling]] moved to [[Pathway:Danio rerio:Nodal Signaling]]: Removed species code prefix from pathway name
	14278	view	07:48, 22 May 2008	SFGKrens	Modified categories
	14047	view	08:24, 21 May 2008	SFGKrens	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, 14047)
#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}