---
title: "ETS file and filter in Link’nX: troubleshooting and FAQ"
description: "ETS file rejected, group address missing, filter search with no result or incomplete generator: the causes and the checks to run in Link’nX."
canonical: https://wiki.can-nx.com/en/guides/link-knx-help/
language: en
product: Link’nX
audience:
  - administrateur
  - installateur
context: "Link’nX web: KNX card, ETS file, address filter and action generator"
---

# ETS file and filter in Link’nX: troubleshooting and FAQ

Context: Link’nX web: KNX card, ETS file, address filter and action generator

ETS file rejected, group address missing, filter search with no result, generator offering too few addresses: here are the answers to the most common problems with ETS files and filters in Link’nX, for installers and administrators.

## Which ETS file should I upload in KNX Configuration?

The XML export of the group addresses: the **Upload a file** picker offers the XML format. The help on this page illustrates this export from ETS 5; follow the [ETS file guide](https://wiki.can-nx.com/en/guides/link-knx-file/). For another ETS version or another format, contact support.

## Why does the ETS file upload fail?

First check the chosen file: it must be the XML export of the addresses of the right project, not empty, 1 MB maximum. If **File is empty**, **File is too large** or **File is not valid** is displayed, apply the matching action from the ETS file guide. Do not repeat the upload without a relevant change. If these checks have already been made, send support the ETS version, the format, the size and the message.

## Why is an address missing when the file is uploaded?

The address may be absent from the file or unchecked in the filter. In **KNX Configuration**, check **Name** and the context. Open **Filter**, clear the search, then expand the group of the address you are looking for:

- if the address is present, check its box in the saved selection;
- if it is absent, check that the chosen file matches the right project, then contact support for the next steps.

Do not change the addresses of the automations to make them match a file you are not sure of.

## Why does a search by name return nothing in the filter?

The [ETS filter search](https://wiki.can-nx.com/en/guides/link-knx-filter/) applies to the address, not the name. Type an address or its levels, for example **1/2** (fictitious example). The search does not uncheck hidden items: clear it before checking the whole selection.

## Why does the generator offer fewer addresses than expected?

A non-empty ETS filter can limit this list. Check the selection with **KNX**, then **Filter**, and follow the [action generator guide](https://wiki.can-nx.com/en/guides/link-action-generate/). If the addresses remain inconsistent with the verified file and selection, contact support.

## Can I re-upload the JSON file downloaded with the downward arrow?

No, not through **Upload a file**. **Download the filtered ETS configuration** provides a JSON copy of the selection, whereas the upload expects the XML export of the addresses. To restore a selection from a JSON or transfer it to another context, contact support and describe the result you want.

## Can I delete the ETS file without consequences for the automations?

Contact support before removing a file used by an existing installation, to establish the consequences and the appropriate procedure. Do not rely on deletion to reset the commands, restore a physical state or automatically preserve all configuration links.

## Contact support

Write to support@can-nx.com with: Link’nX, the project and gateway, the intended operation, the name and format of the file, the message displayed and the checks already made. A screenshot without sensitive data can help. Do not attach any password, secret or confidential file.