# GNURadio fails to generate flow graph

**URL:** <https://www.ruby-forum.com/t/gnuradio-fails-to-generate-flow-graph/259896>\
**Category:** GNU Radio\
**Created:** [June 25, 2020, 8:59pm UTC](https://www.ruby-forum.com/t/gnuradio-fails-to-generate-flow-graph/259896 "2020-06-25T20:59:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![bob11334](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/ba8739/32.png) [@bob11334](https://www.ruby-forum.com/u/bob11334)\
**Post date:** [June 25, 2020, 8:59pm UTC](https://www.ruby-forum.com/t/gnuradio-fails-to-generate-flow-graph/259896/1 "2020-06-25T20:59:40Z")

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Was away from GNURadio for about a month and when I came back, none of my flow graphs built at all.

Using Ubuntu 18.04 dual booted from Windows 10 with GNURadio 3.9

Attached image is the error it’s throwing

Image in replies is the flow graph I’m trying to work with (although neither new nor old flow graphs generate now)

 ![image](https://www.ruby-forum.com/uploads/default/original/2X/d/da93e426d4d2ea1cdd2dcc4178cdea31e27b97a3.png)

Thoughts?

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<div class="post-metadata">

**Author:** ![bob11334](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/b/ba8739/32.png) [@bob11334](https://www.ruby-forum.com/u/bob11334)\
**Post date:** [June 25, 2020, 9:00pm UTC](https://www.ruby-forum.com/t/gnuradio-fails-to-generate-flow-graph/259896/2 "2020-06-25T21:00:13Z")

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![image](https://www.ruby-forum.com/uploads/default/original/2X/2/2fd3545c9e11550dfffcb6f0e64151174075ee68.png)