--- title: "Avontus Designer 2018 R4" slug: "avontus-designer-2018-r4" updated: 2023-07-27T14:31:59Z published: 2023-07-27T14:31:59Z canonical: "docs.avontus.com/avontus-designer-2018-r4" --- > ## Documentation Index > Fetch the complete documentation index at: https://docs.avontus.com/llms.txt > Use this file to discover all available pages before exploring further. # Avontus Designer 2018 R4 ### **Version: 6.2.507.0 Release Date: February 20, 2018** ## Issues Resolved - Fixed an issue in drawing flat bottom boilers with zero slope angle. - Fixed an issue in drawing bays with elevations of large negative values. - Fixed an issue in which removing guardrails on a single level bay was causing the entire vertical members to be removed.