<style>p { margin: 0; }span.fr-emoticon.fr-emoticon-img { background-repeat: no-repeat !important; font-size: inherit; height: 1em; width: 1em; min-height: 20px; min-width: 20px; display: inline-block; margin: -0.1em 0.1em 0.1em; line-height: 1; vertical-align: middle; } span.fr-emoticon { font-weight: normal; font-family: "Apple Color Emoji", "Segoe UI Emoji", "NotoColorEmoji", "Segoe UI Symbol", "Android Emoji", "EmojiSymbols"; display: inline; line-height: 0; } blockquote { border-left: solid 2px #5e35b1; color: #5e35b1; margin-left:0; padding-left:5px;}blockquote blockquote{ border-color: #00bcd4; color: #00bcd4;}blockquote blockquote blockquote{ border-color: #43a047; color: #43a047;} table.grid{ border-collapse: collapse;} table.grid td, table.grid th { border: 1px solid #ddd;} .fr-fic.fr-dib{ display: block; margin: 5px auto;}.fr-fic.fr-dib.fr-fir{ text-align: right; margin: 5px 0 5px auto;}.fr-fic.fr-dib.fr-fil{ text-align: left; margin: 5px auto 5px 0;}.fr-fic.fr-dii{ float: none; margin: 5px auto;}.fr-fic.fr-dii.fr-fil{ float: left; margin: 5px auto;}.fr-fic.fr-dii.fr-fir{ float: right; margin: 5px auto;}img.fr-dib.fr-fir { margin-right: 0; text-align: right;}img.fr-dib.fr-fil { margin-left: 0; text-align: left;}img.fr-dib { margin: 5px auto; display: block; float: none;}img.fr-bordered { box-sizing: content-box; border: solid 5px #CCC;}img.fr-shadow { box-shadow: 10px 10px 5px 0px #cccccc;}img.fr-rounded { border-radius: 10px; -moz-border-radius: 10px; -webkit-border-radius: 10px; -moz-background-clip: padding; -webkit-background-clip: padding-box; background-clip: padding-box;}</style><p><strong>In this guide we will cover:</strong></p><p><strong>- Steps to Troubleshoot IronPDF Errors</strong></p><p><br></p><p><br><strong>Related Guides:</strong></p><ul><li><a href="https://usehalo.com/haloitsm/guides/2623" target="_blank" rel="noopener noreferrer"><strong>On-Prem Upgrade – Troubleshooting</strong></a></li></ul><p><br></p><p>If you are self-hosted (On-Prem), you may sometimes see error messages referring to IronPDF when generating a PDF or attachment. This guide will cover files to check. </p><p><br></p><p>If you have any issues with PDF generation following this guide, please contact support for further assistance.</p><p><br></p><p><strong><span style="font-size: 14pt;">Failed to generate pdf: Failed to create PDF - Error while deploying Pdfium for IronPdf: 'Invalid assembly version for 'IronPdfInterop'</span></strong></p><p><strong><span style="font-size: 14pt;">Failed to generate pdf: Failed to create PDF - Error while deploying IronPdf Chrome renderer: 'Multiple issues occurred while trying to deploy Chrome (Invalid assembly version for 'IronInterop' </span></strong></p><p>Stop the Halo site in IIS, delete these two files from "<strong>\api\runtimes\win-x64\</strong><span style="font-size: inherit;"><strong>native</strong>", then start IIS again.</span></p><p><br></p><ul><li data-pasted="true">IronPdfInterop.dll</li><li><span style="font-size: inherit;">Pdfium.Native.deployment.json</span></li></ul><p><br></p><p>If this does not fix the error, make a copy of the "<strong>/runtime</strong>" folder and remove everything in the original folder. Then, try the same process of stopping IIS, delete the files, start IIS, again.</p><p><br></p>
