# Data Mover 1.20.1

### About these Release Notes <a href="#about-these-release-notes" id="about-these-release-notes"></a>

Release date: September 26<sup>th</sup>, 2023.

This document applies to Data One v1.20.1 for all supported platforms, databases, and cluster types.

### Fixes <a href="#new-features-and-enhancements" id="new-features-and-enhancements"></a>

The following sections outline problems or malfunctions that have been corrected:

* \[DAT-6400]: "Not authorized for access" error on high number of simultaneous z/OS transfers
* \[DAT-6412]: PR4 protocol issues on external file transfers between z/OS and Linux nodes

### Known problems and workarounds <a href="#known-problems-and-workarounds" id="known-problems-and-workarounds"></a>

The following section highlights known issues that have been identified during the certification phase but could not be resolved in this release. Please review the list of known issues for any potential impact on your usage of the platform, we are actively investigating this issue and working towards a resolution.

* \[DAT-6354] FTPS transfers through DMZ are not supported due to an unresolved regression.


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