Column names do not appear in the Tables & Columns moduleDescription Fields are not populating properly in the tables and columns for tables with extensions, like Configuration Item or Task. When selecting tables under the Table Names column on the Tables & Columns display, some tables do not update the "Column Name" and "Column Attributes" columns, throwing javascript error on the browser console: Uncaught TypeError: Cannot read property 'length' of null table_columns TypeError: tables is null These are caused by the functions: shouldShowExtensionButton setExtensionButton tcColumnRequest Steps to Reproduce Navigate to System Definition > Tables & Columns. In the Table Names pane, select configuration item [cmdb_ci].Note that the fields do not appear in the Column Names pane. Workaround If not possible to upgrade to Fuji or later releases, set the system property glide.table.allow_new_extension to false. Related Problem: PRB598110