--- title: How do you provide a Lumion Error and/or Importers Log file? description: Generating and Sending an Error Log and Importers Log for Lumion Support Troubleshooting --- Solutions [Architectural design All you need to bring your residential, commercial or institutional designs to life](https://lumion.com/product/architectural-design) [Landscape architecture Beautiful terrains and fine-detailed nature for any climate or season](https://lumion.com/product/landscape-architecture) [Interior design Realistic light, high-quality textures, and an extensive asset library](https://lumion.com/product/interior-design) [Students and Faculties Lumion is free for students, educators, and faculties around the world](https://lumion.com/product/educational-licenses) [SketchUp](https://lumion.com/compatibility/sketchup-rendering) [Revit](https://lumion.com/compatibility/revit-rendering) [ArchiCAD](https://lumion.com/compatibility/archicad-rendering) [Rhino](https://lumion.com/compatibility/rhino-rendering) [Autocad](https://lumion.com/compatibility/autocad-rendering) [See more](https://lumion.com/compatibility/) Product [Discover Axogram New Live architectural diagramming](https://lumion.com/product/axogram) [Lumion Cloud Where design meets collaboration](https://lumion.com/product/lumion-cloud) [Lumion Pro Advanced visualization solution](https://lumion.com/product/lumion-pro) [Discover AI tools New AI built for architectural work](https://lumion.com/product/ai) [Lumion Pro 2026.1 is out now! 🚀](https://lumion.com/product/latest-version-pro) [Compatibility](https://lumion.com/compatibility/) [System Requirements](https://lumion.com/product/system-requirements) [Roadmap](https://lumion.com/product/roadmap) [Pricing](https://lumion.com/product/buy) Resources [Made with Lumion Get inspired by the stories behind the designs](https://lumion.com/made-with-lumion) [Tips & Guides Make the most out of Lumion with helpful guides and tutorials](https://lumion.com/tips-guides) [Knowledge base](https://support.lumion.com/knowledge-base?hsLang=en-us) [Community](https://community.lumion.com/index.php) [Downloads](https://support.lumion.com/downloads?hsLang=en-us) About [Who we are Learn about our story and mission](https://lumion.com/about) [Careers - We're hiring Let's build the future of architectural visualization](https://lumion.com/about/careers) [News Discover the latest product news and more](https://lumion.com/news) [Find your local reseller](https://lumion.com/about/find-reseller) [Contact us](https://lumion.com/about/contact) [![Lumion-logo](https://support.lumion.com/hubfs/raw_assets/public/KnowledgeBase/img/lumion_logo.svg)](http://lumion.com) [My Account](https://account.lumion.com) Solutions [Architectural design](https://lumion.com/product/architectural-design) [Interior design](https://lumion.com/product/interior-design) [Landscape architecture](https://lumion.com/product/landscape-architecture) [Students and Faculties](https://lumion.com/product/educational-licenses) --- [SketchUp](https://lumion.com/compatibility/sketchup-rendering) [Revit](https://lumion.com/compatibility/revit-rendering) [ArchiCAD](https://lumion.com/compatibility/archicad-rendering) [Rhino](https://lumion.com/compatibility/rhino-rendering) [Autocad](https://lumion.com/compatibility/autocad-rendering) [See more](https://lumion.com/compatibility/) Product [Axogram New](https://lumion.com/product/axogram) [Lumion Cloud](https://lumion.com/product/lumion-cloud) [Lumion Pro](https://lumion.com/product/lumion-pro) [Discover AI tools New](https://lumion.com/product/ai) --- [Lumion Pro 2026.1 is out now! 🚀](https://lumion.com/product/latest-version-pro) [Compatibility](https://lumion.com/compatibility/) [System Requirements](https://lumion.com/product/system-requirements) [Roadmap](https://lumion.com/product/roadmap) [Pricing](https://lumion.com/product/buy) Resources [Made with Lumion](https://lumion.com/made-with-lumion) [Tips & Guides](https://lumion.com/tips-guides) --- [Knowledge base](https://support.lumion.com/knowledge-base?hsLang=en-us) [Community](https://community.lumion.com/index.php) [Downloads](https://support.lumion.com/downloads?hsLang=en-us) About [Who we are](https://lumion.com/about) [Careers - We're hiring](https://lumion.com/about/careers) [News](https://lumion.com/news) --- [Find your local reseller](https://lumion.com/about/find-reseller) [Contact us](https://lumion.com/about/contact) [My Account](https://account.lumion.com) [Submit a request](https://support.lumion.com/hc/en-us/requests/new?hsLang=en-us) Lumion Knowledge Base How can we help? - There are no suggestions because the search field is empty. [Skip to content](https://support.lumion.com/knowledge-base/api/v2/help_center/en-us/articles/360003479073.json#main-content) English - United States Show submenu for translations ![Lumion logo](https://support.lumion.com/hs-fs/hubfs/Logo%20horizontal%202023-1.png?width=1353&height=640&name=Logo%20horizontal%202023-1.png) Open main navigation Close main navigation - English - United States Show submenu for translations - Contact us Contact us How can we help you? - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://support.lumion.com/knowledge-base?hsLang=en-us) 2. [Troubleshooting](https://support.lumion.com/knowledge-base/troubleshooting?hsLang=en-us) 3. [Reports about your PC](https://support.lumion.com/knowledge-base/troubleshooting?hsLang=en-us#reports-about-your-pc) # How do you provide a Lumion Error and/or Importers Log file? Technical support staff may ask you for a Lumion *Error Log* file from time to time when working to resolve hardware or a Lumion compatibility issue. Please follow the instructions below if you have been asked to provide this file. **Applies to:** Lumion 8.3 and newer:   ### 1. If you can open Lumion **1.1:** Click on the *Settings* button, ![Settings \_full window.jpg](https://support.lumion.com/hs-fs/hubfs/Knowledge%20Base%20Import/17536274898076_1753906755668-2.jpg?width=670&height=438&name=17536274898076_1753906755668-2.jpg) **1.2**: Click on the *System* tab. **1.3:**  Then click on the button *Write error log* and set it to **On** and **restart** Lumion: ![Settings - System - Write Error log btn.jpg](https://support.lumion.com/hs-fs/hubfs/Knowledge%20Base%20Import/17536274898460_1753906756998-2.jpg?width=670&height=438&name=17536274898460_1753906756998-2.jpg) **1.4:** Run Lumion and perform the tasks to replicate the issue. **1.5:** Return to the *Settings \> System* screen.   ![Settings - System - Write Error log -Save copy.jpg](https://support.lumion.com/hs-fs/hubfs/Knowledge%20Base%20Import/17536301473692_1753906759099-2.jpg?width=670&height=438&name=17536301473692_1753906759099-2.jpg) **1.6:** Click on the *Settings* button followed by the *Save copy...* button. Enter a file name and press Enter. **1.7:**  Send us the file. [Contact Us](https://support.lumion.com/knowledge-base/api/v2/help_center/en-us/articles/360041760194.json?hsLang=en-us)   ### 2. If Lumion does not open: #### 2.1: Lumion has written entries to the log file In some cases, there will be a log file if Lumion was able to open in prior sessions, even though it does not open now. Locate the *Error.log* file in this folder on your PC: C:\\Users\\YourUserName\\AppData\\Roaming\\Quest3D If the file exists and is larger than 0KB then there could be entries in the log file we need to see. ![mceclip1.png](https://support.lumion.com/hubfs/Knowledge%20Base%20Import/4420178578578_1753906761387-2.png) Attach the file to your next reply to us: [Contact Us](https://support.lumion.com/knowledge-base/api/v2/help_center/en-us/articles/360041760194.json?hsLang=en-us) When asked, please also include the *Importers.log* file, (if it exists), in the folder:  C:\\Users\\YourUserName\\AppData\\Roaming\\Quest3D.   #### 2.2: Lumion has not written entries to the log file If Lumion has not been able to open then it's possible there is no *Error.log* file. Or, there is a file, but it has no entries and its file size is 0Kb. Just let us know if there is nothing to send, and there is no file, or if it is 0Kb. 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