# "Unknown exception. Status code:404" - Python/MATLAB API version issue

**URL:** <https://forum.liquidinstruments.com/t/unknown-exception-status-code-404-python-matlab-api-version-issue/475>\
**Category:** Software & APIs\
**Created:** [February 10, 2022, 12:50am UTC](https://forum.liquidinstruments.com/t/unknown-exception-status-code-404-python-matlab-api-version-issue/475 "2022-02-10T00:50:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Sam.Speece](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.liquidinstruments.com/sam.speece/32/191_2.png) [@Sam.Speece](https://forum.liquidinstruments.com/u/Sam.Speece)\
**Post date:** [February 10, 2022, 12:50am UTC](https://forum.liquidinstruments.com/t/unknown-exception-status-code-404-python-matlab-api-version-issue/475/1 "2022-02-10T00:50:56Z")

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On Monday, Feb 8 we updated the Python and MATLAB API packages for the Moku:Go and Moku:Pro to v2.2 for each. For help on how to download and install these packages for the first time, please follow the appropriate instructions [here](https://apis.liquidinstruments.com/).

**Moku:Go Users** - There is a mismatch between the firmware and API package that is causing various bugs and issues when using Python or MATLAB with Moku:Go. Please use v2.1 of the Python and MATLAB packages to fix these issues. To downgrade the MATLAB toolbox, go to the Add-on Manager page for the moku-MATLAB toolbox and in the top right corner of the page click “View Version History”. This will give you the option to downgrade to v2.1 of the toolbox.

 ![image](https://canada1.discourse-cdn.com/flex035/uploads/liquidinstruments/original/1X/127ceb9e81bba0ea23e61665d0eb1c130f21d4d7.jpeg)

To downgrade the moku-Python package, open a command terminal and enter the command

`pip install moku==2.1`

**Moku:Pro Users** - Continue using v2.2 for Python and MATLAB packages.

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<div class="post-metadata">

**Author:** ![Sam.Speece](https://yyz1.discourse-cdn.com/flex035/user_avatar/forum.liquidinstruments.com/sam.speece/32/191_2.png) [@Sam.Speece](https://forum.liquidinstruments.com/u/Sam.Speece)\
**Post date:** [March 22, 2022, 6:06pm UTC](https://forum.liquidinstruments.com/t/unknown-exception-status-code-404-python-matlab-api-version-issue/475/2 "2022-03-22T18:06:49Z")

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