# Dragonfly urbanopt simulation fail to run

**URL:** <https://discourse.ladybug.tools/t/dragonfly-urbanopt-simulation-fail-to-run/23927>\
**Category:** dragonfly-legacy\
**Created:** [February 1, 2024, 6:46am UTC](https://discourse.ladybug.tools/t/dragonfly-urbanopt-simulation-fail-to-run/23927 "2024-02-01T06:46:45Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![yumoni](https://discourse.ladybug.tools/letter_avatar_proxy/v4/letter/y/ecb155/32.png) [@yumoni](https://discourse.ladybug.tools/u/yumoni)\
**Post date:** [February 1, 2024, 6:46am UTC](https://discourse.ladybug.tools/t/dragonfly-urbanopt-simulation-fail-to-run/23927/1 "2024-02-01T06:46:45Z")

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Recently, in the process of using DF, there was a situation that it can start running, but it has not responded, so I reinstalled urbanopt, but found that there is still a problem, and ran it with the official program, and the following error prompt appeared.  
The software versions are: rhino7.34, Lbt1.6.0, urbanopt0.10.0, openstudio3.5.0.

1. Solution exception:The URBANopt simulation failed to run.  
No results were found at:  
C:\Users\Dell\simulation\Buffalo\_New\_Development\run\honeybee\_scenario  
Top level ::CompositeIO is deprecated, require ‘multipart/post’ and use `Multipart::Post::CompositeReadIO` instead!  
Top level ::Parts is deprecated, require ‘multipart/post’ and use `Multipart::Post::Parts` instead!  
C:/Users/Dell/simulation/Buffalo\_New\_Development/.bundle/install/ruby/2.7.0/gems/openstudio-extension-0.6.1/lib/openstudio/extension/version.rb:8: warning: already initialized constant OpenStudio::Extension::VERSION  
C:/URBANopt-cli-0.10.0/gems/ruby/2.7.0/gems/openstudio-extension-0.6.1/lib/openstudio/extension/version.rb:8: warning: previous definition of VERSION was here  
C:/Users/Dell/simulation/Buffalo\_New\_Development/.bundle/install/ruby/2.7.0/gems/openstudio-extension-0.6.1/lib/openstudio/extension/runner\_config.rb:11: warning: already initialized constant OpenStudio::Extension::RunnerConfig::FILENAME  
C:/URBANopt-cli-0.10.0/gems/ruby/2.7.0/gems/openstudio-extension-0.6.1/lib/openstudio/extension/runner\_config.rb:11: warning: previous definition of FILENAME was here  
C:/URBANopt-cli-0.10.0/gems/ruby/2.7.0/gems/urbanopt-cli-0.10.0/lib/uo\_cli.rb:25: warning: already initialized constant URBANopt::CLI::UrbanOptCLI::COMMAND\_MAP  
C:/URBANopt-cli-0.10.0/gems/ruby/2.7.0/gems/urbanopt-cli-0.10.0/lib/uo\_cli.rb:25: warning: previous definition of COMMAND\_MAP was here  
Invalid command, please run uo --help for a list of available commands  
 ![image](https://discourse.ladybug.tools/uploads/default/original/3X/5/c/5cf65c751e571b8157e3baba013b62ce1bb7954c.png)

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**Author:** ![Batiste](https://discourse.ladybug.tools/letter_avatar_proxy/v4/letter/b/a88e4f/32.png) [@Batiste](https://discourse.ladybug.tools/u/Batiste)\
**Post date:** [February 1, 2024, 9:23am UTC](https://discourse.ladybug.tools/t/dragonfly-urbanopt-simulation-fail-to-run/23927/2 "2024-02-01T09:23:06Z")

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I have the same problem when I run DF Modelia DES but I am able to run the urbanopt simulation

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**Author:** ![Ninghao](https://discourse.ladybug.tools/letter_avatar_proxy/v4/letter/n/dbc845/32.png) [@Ninghao](https://discourse.ladybug.tools/u/Ninghao)\
**Post date:** [August 25, 2025, 1:03pm UTC](https://discourse.ladybug.tools/t/dragonfly-urbanopt-simulation-fail-to-run/23927/3 "2025-08-25T13:03:36Z")

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I have the same problem

 ![Screenshot 2025-08-25 210321](https://discourse.ladybug.tools/uploads/default/original/3X/c/3/c3f2b2930666413302f4c2d9d36855cca37fa779.jpeg)

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**Author:** ![behnammmohseni](https://discourse.ladybug.tools/letter_avatar_proxy/v4/letter/b/c68b51/32.png) [@behnammmohseni](https://discourse.ladybug.tools/u/behnammmohseni)\
**Post date:** [August 26, 2025, 9:04am UTC](https://discourse.ladybug.tools/t/dragonfly-urbanopt-simulation-fail-to-run/23927/4 "2025-08-26T09:04:52Z")

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@Ninghao

You need to update your URBANopt installation with the latest release and update the LB from the LB Update component. Things will be solved.