> For the complete documentation index, see [llms.txt](https://help.bioinsight.illumina.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.bioinsight.illumina.com/basespace/releases/previous-releases/2017/4.21.0.md).

# 4.21.0

### March 23, 2017 - 4.21 - App User Tracking in Detailed Usage Reports

* Features:
  * Users are now automatically logged into their last-used workgroup at log in
  * The active user running an app is tracked in the detailed usage download file
  * Improved load time performance of the header
* Bugs Fixed:
  * User interface fix to automatically navigate to the top of new table pages

\###Release 4.21.1 - April 4, 2017

**BaseSpace Sequence Hub**

* Native app engine security update

**FASTQ Generation**

* Bugs Fixed:
  * Fixed an issue with FASTQ Generation where reads designed to be shorter than 35 bases were masked out with "N" characters


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