{"id":11204,"date":"2026-02-01T09:17:02","date_gmt":"2026-02-01T09:17:02","guid":{"rendered":"https:\/\/www.magetop.com\/blog\/?p=11204"},"modified":"2026-02-01T09:17:05","modified_gmt":"2026-02-01T09:17:05","slug":"fix-magento-2-failed-to-open-stream-error","status":"publish","type":"post","link":"https:\/\/www.magetop.com\/blog\/fix-magento-2-failed-to-open-stream-error\/","title":{"rendered":"Fix Failed to Open Stream Error in PluginListGenerator.php in Magento 2"},"content":{"rendered":"\n<p>When installing or compiling Magento 2, especially on <strong><a href=\"https:\/\/www.apachefriends.org\/index.html\">XAMPP<\/a> environments<\/strong>, you may encounter a <strong>\u201cFailed to open stream\u201d error<\/strong> related to <code>PluginListGenerator.php<\/code>.<\/p>\n\n\n\n<p>This issue has been observed in multiple Magento 2 versions, including <strong>Magento 2.4.7<\/strong>, and commonly occurs during dependency injection compilation. The error is caused by an <strong>invalid cache ID delimiter<\/strong>, not by missing files or permission problems.<\/p>\n\n\n\n<p>This article explains the <strong>exact cause<\/strong> and shows the <strong>correct fix<\/strong> that resolves the issue.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Error Message Example<\/strong><\/h2>\n\n\n\n<p>The error usually appears when running:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: php; title: ; notranslate\" title=\"\">\nphp bin\/magento setup:di:compile\n<\/pre><\/div>\n\n\n<p>With a message similar to:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nWarning: file_put_contents(C:\/xampp\/htdocs\/magento247p3\/generated\/metadata\/primary|global|plugin-list.php): Failed to open stream: No such file or directory in C:\\xampp\\htdocs\\magento247p3\\vendor\\magento\\framework\\Interception\\Plu ginListGenerator.php on line 411\n<\/pre><\/div>\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"176\" data-attachment-id=\"11206\" data-permalink=\"https:\/\/www.magetop.com\/blog\/fix-magento-2-failed-to-open-stream-error\/failed-to-open-stream-error-in-pluginlistgenerator\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2026\/02\/Failed-to-Open-Stream-Error-in-PluginListGenerator.png?fit=1118%2C246&amp;ssl=1\" data-orig-size=\"1118,246\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Failed to Open Stream Error in PluginListGenerator\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2026\/02\/Failed-to-Open-Stream-Error-in-PluginListGenerator.png?fit=300%2C66&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2026\/02\/Failed-to-Open-Stream-Error-in-PluginListGenerator.png?fit=800%2C176&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2026\/02\/Failed-to-Open-Stream-Error-in-PluginListGenerator.png?resize=800%2C176&#038;ssl=1\" alt=\"\" class=\"wp-image-11206\" srcset=\"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2026\/02\/Failed-to-Open-Stream-Error-in-PluginListGenerator.png?resize=1024%2C225&amp;ssl=1 1024w, https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2026\/02\/Failed-to-Open-Stream-Error-in-PluginListGenerator.png?resize=300%2C66&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2026\/02\/Failed-to-Open-Stream-Error-in-PluginListGenerator.png?resize=768%2C169&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2026\/02\/Failed-to-Open-Stream-Error-in-PluginListGenerator.png?w=1118&amp;ssl=1 1118w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/figure>\n\n\n\n<p>This issue is <strong>frequently reported on local environments<\/strong>, especially when installing Magento 2 on <strong>XAMPP (Windows)<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Root Cause of the Issue<\/strong><\/h2>\n\n\n\n<p>Magento generates a cache ID for plugin interception using the following code:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: php; title: ; notranslate\" title=\"\">\n$cacheId = implode('|', $this-&gt;scopePriorityScheme) . &quot;|&quot; . $this-&gt;cacheId;\n<\/pre><\/div>\n\n\n<p>The pipe character (<code>|<\/code>) can result in an <strong>invalid file path<\/strong> when Magento attempts to read the cached plugin list, particularly on <strong>Windows-based environments like XAMPP<\/strong>.<\/p>\n\n\n\n<p>This leads PHP to throw a <strong>\u201cfailed to open stream\u201d<\/strong> error.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How To Fix Failed to Open Stream Error in PluginListGenerator.php in Magento 2<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Step 1: Open the File<\/strong><\/h3>\n\n\n\n<p>Navigate to:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nvendor\/magento\/framework\/Interception\/PluginListGenerator.php\n<\/pre><\/div>\n\n\n<h3 class=\"wp-block-heading\"><strong>Step 2: Update the Cache ID Line<\/strong><\/h3>\n\n\n\n<p>Replace the original line with the corrected version below.<\/p>\n\n\n\n<p><strong>\u274c Original code<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: php; title: ; notranslate\" title=\"\">\n$cacheId = implode('|', $this-&gt;scopePriorityScheme) . &quot;|&quot; . $this-&gt;cacheId;\n<\/pre><\/div>\n\n\n<p><strong>\u2705 Fixed code<\/strong><\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: php; title: ; notranslate\" title=\"\">\n$cacheId = implode('-', $this-&gt;scopePriorityScheme) . &quot;-&quot; . $this-&gt;cacheId;\n<\/pre><\/div>\n\n\n<p>This change ensures the cache ID is <strong>filesystem-safe<\/strong> and prevents invalid paths from being generated.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Step 3: Run Compilation Again<\/strong><\/h3>\n\n\n\n<p>After applying the fix, run:<\/p>\n\n\n<div class=\"wp-block-syntaxhighlighter-code \"><pre class=\"brush: plain; title: ; notranslate\" title=\"\">\nphp bin\/magento setup:di:compile\nphp bin\/magento cache:flush\n<\/pre><\/div>\n\n\n<p>The error should no longer appear.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Conclusion<\/strong><\/h2>\n\n\n\n<p>The <strong>Failed to open stream error in PluginListGenerator.php<\/strong> is caused by an <strong>invalid cache ID delimiter<\/strong> used by Magento.<\/p>\n\n\n\n<p>Replacing the pipe (<code>|<\/code>) with a hyphen (<code>-<\/code>) is the <strong>correct and minimal fix<\/strong>, and it works reliably in Magento 2, including version <strong>2.4.7<\/strong>, especially on <strong>XAMPP environments<\/strong>.<\/p>\n\n\n\n<p>If you are running Magento 2 on a local Windows environment, especially using <strong>XAMPP<\/strong>, installation issues and PHP-related errors are quite common.<\/p>\n\n\n\n<p>Before troubleshooting compilation or runtime errors, make sure Magento is installed correctly by following our step-by-step guide on <strong><a href=\"https:\/\/www.magetop.com\/blog\/install-magento-2-4-2-on-xampp\/\">How to Install Magento 2 On XAMPP<\/a><\/strong>. A proper XAMPP setup can help avoid many Magento 2 errors related to PHP configuration, file paths, and dependency injection.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>When installing or compiling Magento 2, especially on XAMPP environments, you may encounter a \u201cFailed to open stream\u201d error related<\/p>\n","protected":false},"author":106,"featured_media":11208,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[2],"tags":[125,2565,2578,2200,2016,2579,2577],"class_list":["post-11204","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-magento-2-tutorials","tag-magento-2","tag-magento-2-errors","tag-magento-2-troubleshooting","tag-magento-2-4-7","tag-magento-development","tag-magento-xampp","tag-pluginlistgenerator-php"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - 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It is a conundrum for users who\u2026","rel":"","context":"In &quot;Magento 2 Tutorials&quot;","block_context":{"text":"Magento 2 Tutorials","link":"https:\/\/www.magetop.com\/blog\/magento-2-tutorials\/"},"img":{"alt_text":"How to install Magento 2.4 On XAMPP","src":"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2020\/11\/How-to-install-Magento-2.4-On-XAMPP.jpg?fit=750%2C445&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2020\/11\/How-to-install-Magento-2.4-On-XAMPP.jpg?fit=750%2C445&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2020\/11\/How-to-install-Magento-2.4-On-XAMPP.jpg?fit=750%2C445&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.magetop.com\/blog\/wp-content\/uploads\/2020\/11\/How-to-install-Magento-2.4-On-XAMPP.jpg?fit=750%2C445&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.magetop.com\/blog\/wp-json\/wp\/v2\/posts\/11204","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.magetop.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.magetop.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.magetop.com\/blog\/wp-json\/wp\/v2\/users\/106"}],"replies":[{"embeddable":true,"href":"https:\/\/www.magetop.com\/blog\/wp-json\/wp\/v2\/comments?post=11204"}],"version-history":[{"count":2,"href":"https:\/\/www.magetop.com\/blog\/wp-json\/wp\/v2\/posts\/11204\/revisions"}],"predecessor-version":[{"id":11207,"href":"https:\/\/www.magetop.com\/blog\/wp-json\/wp\/v2\/posts\/11204\/revisions\/11207"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.magetop.com\/blog\/wp-json\/wp\/v2\/media\/11208"}],"wp:attachment":[{"href":"https:\/\/www.magetop.com\/blog\/wp-json\/wp\/v2\/media?parent=11204"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.magetop.com\/blog\/wp-json\/wp\/v2\/categories?post=11204"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.magetop.com\/blog\/wp-json\/wp\/v2\/tags?post=11204"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}