# \#extensions **URL:** https://community.nextw.com/tag/extensions/13.md [Latest](https://community.nextw.com/latest.md) · [Categories](https://community.nextw.com/categories.md) · [Tags](https://community.nextw.com/tags.md) --- ## [Am I not able to extend tables of type 'Setting'?](https://community.nextw.com/t/am-i-not-able-to-extend-tables-of-type-setting/1638)
**Author:** [@ellen.kaufman](https://community.nextw.com/u/ellen.kaufman)\ **Replies:** 3\ **Last updated:** [January 23, 2026, 4:28pm UTC](https://community.nextw.com/t/am-i-not-able-to-extend-tables-of-type-setting/1638 "2026-01-23T16:28:06Z")
Hello! I am trying to extend inventory settings to add a new option for users. However, I got the following error when trying to extend the table: Error - A base table of an extension must be of type Main, Header, Detai… --- ## [Subtable in Detail Application List View Expansion](https://community.nextw.com/t/subtable-in-detail-application-list-view-expansion/1634)
**Author:** [@jjl](https://community.nextw.com/u/jjl)\ **Replies:** 1\ **Last updated:** [January 23, 2026, 2:11pm UTC](https://community.nextw.com/t/subtable-in-detail-application-list-view-expansion/1634 "2026-01-23T14:11:53Z")
In an HD app where the detail app’s List View is the primary view (Journal Entries for example) would it be possible to display a subtable (from an extension) in the expansion of the list view? It does not seem possible… --- ## [Override 'typeahead only' on NW base table fields via extension tables](https://community.nextw.com/t/override-typeahead-only-on-nw-base-table-fields-via-extension-tables/1593)
**Author:** [@connor.hoffman](https://community.nextw.com/u/connor.hoffman)\ **Replies:** 4\ **Last updated:** [January 20, 2026, 5:06pm UTC](https://community.nextw.com/t/override-typeahead-only-on-nw-base-table-fields-via-extension-tables/1593 "2026-01-20T17:06:01Z")
NW base table fields might be restricted to “typeahead only”. This restricts the lookup fields to Primary and Secondary on the application. I would like to override this typeahead only field via extensions to have access… --- ## [Cross-table/Remote field filtering, indexing a non-tablelookup base NW field on an extension table](https://community.nextw.com/t/cross-table-remote-field-filtering-indexing-a-non-tablelookup-base-nw-field-on-an-extension-table/1569)
**Author:** [@connor.hoffman](https://community.nextw.com/u/connor.hoffman)\ **Replies:** 3\ **Last updated:** [January 12, 2026, 6:44pm UTC](https://community.nextw.com/t/cross-table-remote-field-filtering-indexing-a-non-tablelookup-base-nw-field-on-an-extension-table/1569 "2026-01-12T18:44:52Z")
Does NW support “Remote Filter” or “Cross-table filter” I’ve added an index on WriteCheckTo in ns\DirectoryExt hoping it would make that field filterable in apps that link to a directory record (e.g., Supplier Cred… --- ## [Extending Search Action Filters](https://community.nextw.com/t/extending-search-action-filters/1483)
**Author:** [@andrew.garrett](https://community.nextw.com/u/andrew.garrett)\ **Replies:** 1\ **Last updated:** [December 1, 2025, 2:21pm UTC](https://community.nextw.com/t/extending-search-action-filters/1483 "2025-12-01T14:21:18Z")
A partner wants to ADD TO a base search action. They want to filter by an additional field. Is there a way to do this? When we extend the app and add another app setting, that doesn’t work. The base app setting overri… --- ## [List Lookup Customization](https://community.nextw.com/t/list-lookup-customization/1471)
**Author:** [@mhylton](https://community.nextw.com/u/mhylton)\ **Replies:** 1\ **Last updated:** [November 17, 2025, 3:27pm UTC](https://community.nextw.com/t/list-lookup-customization/1471 "2025-11-17T15:27:03Z")
If you have extended a base NW List Lookup and now in a customer environment you want to customize it, do you customize the base or the extended LL or does it not matter? --- ## [App Links from One Join Standard App to another Join Standard App with Extended Fields](https://community.nextw.com/t/app-links-from-one-join-standard-app-to-another-join-standard-app-with-extended-fields/1428)
**Author:** [@claire.minnaar](https://community.nextw.com/u/claire.minnaar)\ **Replies:** 2\ **Last updated:** [November 5, 2025, 6:05am UTC](https://community.nextw.com/t/app-links-from-one-join-standard-app-to-another-join-standard-app-with-extended-fields/1428 "2025-11-05T06:05:53Z")
I have a standard application built over a join table with base tables that have extended fields on them. I want to filter on those extended fields when navigating from another app built over a join table to this standar… --- ## [Common Fields on Extended Header and Detail Tables](https://community.nextw.com/t/common-fields-on-extended-header-and-detail-tables/1411)
**Author:** [@claire.minnaar](https://community.nextw.com/u/claire.minnaar)\ **Replies:** 1\ **Last updated:** [October 30, 2025, 2:15pm UTC](https://community.nextw.com/t/common-fields-on-extended-header-and-detail-tables/1411 "2025-10-30T14:15:17Z")
HI there Can I confirm that if we have extended a header and detail table, we cannot add common fields if we have added the same 2 fields on header and detail and would like to keep them in sync with each other? Thank … --- ## [Extension Applications Require Detail Form](https://community.nextw.com/t/extension-applications-require-detail-form/1400)
**Author:** [@melanie.spence](https://community.nextw.com/u/melanie.spence)\ **Replies:** 2\ **Last updated:** [October 28, 2025, 2:55pm UTC](https://community.nextw.com/t/extension-applications-require-detail-form/1400 "2025-10-28T14:55:03Z")
I am wondering why extension applications require a detail form. We have several extension applications where we simply want to add a field to the list view but then we have to add information to the detail form to get t… --- ## [Do extension fields also get populated when we pass a DSN into an insert record?](https://community.nextw.com/t/do-extension-fields-also-get-populated-when-we-pass-a-dsn-into-an-insert-record/1395)
**Author:** [@ellen.kaufman](https://community.nextw.com/u/ellen.kaufman)\ **Replies:** 3\ **Last updated:** [October 24, 2025, 7:53pm UTC](https://community.nextw.com/t/do-extension-fields-also-get-populated-when-we-pass-a-dsn-into-an-insert-record/1395 "2025-10-24T19:53:32Z")
Hello! I want to confirm: do we expected extension fields to also populated when we insert a record and pass a DSN? In my use case we are inserting a line in UpdateSalesOrderDetailForSplittingSalesOrderLine and I am val… --- ## [Adding fields on extensions](https://community.nextw.com/t/adding-fields-on-extensions/1375)
**Author:** [@ellen.kaufman](https://community.nextw.com/u/ellen.kaufman)\ **Replies:** 2\ **Last updated:** [October 20, 2025, 5:04pm UTC](https://community.nextw.com/t/adding-fields-on-extensions/1375 "2025-10-20T17:04:15Z")
Hello! I am reviewing a story and want to confirm this is expected: in order to add a field to an extension to a field it must be be owned by the same entity as the extension (i.e. nsCox in my case). Is this expected? M… --- ## [Actions on extensions](https://community.nextw.com/t/actions-on-extensions/1352)
**Author:** [@ellen.kaufman](https://community.nextw.com/u/ellen.kaufman)\ **Replies:** 5\ **Last updated:** [October 20, 2025, 4:15pm UTC](https://community.nextw.com/t/actions-on-extensions/1352 "2025-10-20T16:15:55Z")
Hello, I am trying to debug a workflow by setting it up from a row action on the sales order detail extension. I have tried customizing the sales order apps (h/d) in the dev environment (RPDevPartner - coxauto) and test… --- ## [Why can't extension logic blocks be of type Background task?](https://community.nextw.com/t/why-cant-extension-logic-blocks-be-of-type-background-task/1018)
**Author:** [@ian.p](https://community.nextw.com/u/ian.p)\ **Replies:** 2\ **Last updated:** [August 15, 2025, 1:48pm UTC](https://community.nextw.com/t/why-cant-extension-logic-blocks-be-of-type-background-task/1018 "2025-08-15T13:48:00Z")
I’m trying to extend a background task type logic block and encountering Error - Extension Logic Blocks cannot be type Background Task. Why can’t I do this? --- ## [Combining 2 extension tables](https://community.nextw.com/t/combining-2-extension-tables/803)
**Author:** [@stefanus](https://community.nextw.com/u/stefanus)\ **Replies:** 2\ **Last updated:** [August 1, 2025, 5:36pm UTC](https://community.nextw.com/t/combining-2-extension-tables/803 "2025-08-01T17:36:57Z")
If we have 2 extension tables and want to combine those two tables into one, what would be the best approach? Do we add the fields of Table B to Table A and deprecate Table B as well as unmark it as an extension table? --- ## [Does Dynamic Table Lookup support Customized or Extended Table fields?](https://community.nextw.com/t/does-dynamic-table-lookup-support-customized-or-extended-table-fields/725)
**Author:** [@Aaron.C](https://community.nextw.com/u/Aaron.C)\ **Replies:** 1\ **Last updated:** [July 9, 2025, 1:18pm UTC](https://community.nextw.com/t/does-dynamic-table-lookup-support-customized-or-extended-table-fields/725 "2025-07-09T13:18:03Z")
If I have a customized or extended version of a table. Will I be able to select the field that is not on the base version in the selector for data items that use that table as part of a Dynamic Table Lookup configuration… --- ## [Application built using an extended table](https://community.nextw.com/t/application-built-using-an-extended-table/608)
**Author:** [@jillene.r](https://community.nextw.com/u/jillene.r)\ **Replies:** 2\ **Last updated:** [July 7, 2025, 10:01pm UTC](https://community.nextw.com/t/application-built-using-an-extended-table/608 "2025-07-07T22:01:44Z")
I want to create an application that is not an extension, but uses a table that is an extension. However, I get an error upon saving the application. Can you explain why I cannot build any app I want over an extended tab… --- ## [Does a layout app override base app extension apps?](https://community.nextw.com/t/does-a-layout-app-override-base-app-extension-apps/679)
**Author:** [@stefanus](https://community.nextw.com/u/stefanus)\ **Replies:** 1\ **Last updated:** [July 7, 2025, 3:12pm UTC](https://community.nextw.com/t/does-a-layout-app-override-base-app-extension-apps/679 "2025-07-07T15:12:27Z")
If we extended a base app in the past with 2 additional tabs and then introduced a layout app without those two tabs, would the extension app still have any effect on the UI? --- ## [Can I display a base NW field on an application extension?](https://community.nextw.com/t/can-i-display-a-base-nw-field-on-an-application-extension/363)
**Author:** [@jillene.r](https://community.nextw.com/u/jillene.r)\ **Replies:** 1\ **Last updated:** [June 9, 2025, 4:24pm UTC](https://community.nextw.com/t/can-i-display-a-base-nw-field-on-an-application-extension/363 "2025-06-09T16:24:06Z")
Can I display a base field’s table lookup value on my application extension. For example, I’ve extended the Sales Order Header and want to display the CustomerName\_CustomerClassification table lookup field on my extensio…