# Setup.sh fails on Ubuntu 14.04: Could not load type 'System.Net.HttpWebRequest' from assembly

**URL:** <https://forums.unrealengine.com/t/setup-sh-fails-on-ubuntu-14-04-could-not-load-type-system-net-httpwebrequest-from-assembly/362670>\
**Category:** Platform & Builds\
**Tags:** source-build, compiling, Linux, unreal-engine, question\
**Created:** [July 1, 2016, 4:52pm UTC](https://forums.unrealengine.com/t/setup-sh-fails-on-ubuntu-14-04-could-not-load-type-system-net-httpwebrequest-from-assembly/362670 "2016-07-01T16:52:35Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![victorngthowhing](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@victorngthowhing](https://forums.unrealengine.com/u/victorngthowhing)\
**Post date:** [July 1, 2016, 4:52pm UTC](https://forums.unrealengine.com/t/setup-sh-fails-on-ubuntu-14-04-could-not-load-type-system-net-httpwebrequest-from-assembly/362670/1 "2016-07-01T16:52:35Z")

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Hi everyone,  
I’m trying to build UE from source on a 14.04 Ubuntu Linux machine.  
When I get to the Setup.sh stage, I start downloading dependencies but then get an error:  
Updating dependencies: 0% (0/23383)…  
Failed to download ‘[http://cdn.unrealengine.com/dependencies/2964232-10fa809e802b48afac4d841dce12100b/0466ae16eae3332c50e1686ec1773ed8b90cd65d](http://cdn.unrealengine.com/dependencies/2964232-10fa809e802b48afac4d841dce12100b/0466ae16eae3332c50e1686ec1773ed8b90cd65d)’: Could not load type ‘System.Net.HttpWebRequest’ from assembly ‘System, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089’. (TypeLoadException)  
Result: 1

Any ideas what is going on?  
Victor

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<div class="post-metadata">

**Author:** ![victorngthowhing](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@victorngthowhing](https://forums.unrealengine.com/u/victorngthowhing)\
**Post date:** [July 1, 2016, 5:04pm UTC](https://forums.unrealengine.com/t/setup-sh-fails-on-ubuntu-14-04-could-not-load-type-system-net-httpwebrequest-from-assembly/362670/2 "2016-07-01T17:04:26Z")

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Ok, I was able to get things to work by removing an old installation of monodevelop and libmono-system\* packages from my Ubuntu system first using sudo apt-get remove, then re-running the Setup.sh script (which probably installed the correct versions of mono that supports the System.Net.HttpWebRequest command).