---
title: v4
slug: changelog/v4
docTags: 
createdAt: 2025-12-23T08:32:18.150Z
---

## v4.1.0

Released on 30/06/2022

### Features

### General

- In the time series database overview, databases are sorted by name
- An about screen was added in the user menu in the bottom left of the screen displaying the current Historian version. On clicking the about screen, links pop up to the Historian documentation and the factry client portal.
- Added pagination to the log viewer

### Measurements

- In the measurement list, measurements can be filtered by uuid
- Importing meassurements support an "Import" column. When left blank, the measurement on the corresponding row will not be imported. Filling in any value in this column (eg X), will import the measurement on the corresponding row. The use of the column is optional.
- The measurements overview auto-refreshes to live update the measurement statuses

### Collectors

- The collector health status dot has been restyled using additional status colors.

### Bug fixes

- Stability improvements in the bulk import error handling

### Docs

- Added advanced environment variables to collector documentation

## v4.0.6

Released on 16/06/2022

### Bug fixes

- Disable profiling on production builds

## v4.0.5

Released on 14/06/2022

### Bug fixes

- Fixed "too many open files" issue by influx connection cleanup

## v4.0.4

Released on 07/06/2022

### Bug fixes

- Fixed broken measurements filter

## v4.0.3

Released on 02/06/2022

### Bug fixes

- Allow for larger GRPC messages
- Display user group name instead of description
- Fixed possible "out-of-range" error
- Fixed nil pointer problem on non-preloaded measurements

## v4.0.1

Released on 09/05/2022

### Bug fixes

- Removed profiling code from the binary

## v4.0.0

Released on 04/05/2022

### Breaking changes

- To support the use of a new influxdb storage model some influx-data will have to be migrated
- Pre v4.0 collectors will have to be upgraded due to changes to the historian API

### Features

This release includes the following new features:

- [Audit logs](#)
- [Encrypted GRPC communication](#)
- [New influx storage model](#)
- Added support for changing the datatype of a measurement
- Added support for array data types
- Pause and resume [collectors](#) and [measurements](#)
- Collector health history
- Collector statistics and logs
- Bulk import measurement from excel
- [External measurement validation](#)
- Added an option to filter on measurement quality in the measurement list

### Audit logs

The historian server now audits the creation, updating and deletion of the following objects:

- Historian users
- Historian settings
- Measurements and measurement settings
- Time series databases
- Collectors

### Encrypted GRPC communication

The collectors now securely communicate with the historian via the [GRPC](https://grpc.io/) protocol. This significantly reduces the amount of bandwidth used by the factry collector.