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I am Trying to configure unreal engine on Ubuntu 18.04, And When I run ./Setup.sh, I got the error of a package that have unmet dependencies: The following packages have unmet dependencies:

libmono-system-web-extensions4.0-cil : Depends: libmono-system-drawing4.0-cil (>= 3.0.6) but it is not going to be installed
Depends: libmono-system-servicemodel4.0a-cil (>= 3.2.3) but it is not going to be installed
Depends: libmono-system-web-services4.0-cil (>= 1.0) but it is not going to be installed
Depends: libmono-system-web4.0-cil (>= 2.10.3) but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

How can I solve this ?

This is what I got running apt-cache policy:

libmono-system-web-extensions4.0-cil: Installed: (none) 
Candidate: 5.14.0.177-0xamarin3+ubuntu1604b1 
Version table: 5.14.0.177-0xamarin3+ubuntu1604b1 500
500 https://download.mono-project.com/repo/ubuntu stable-xenial/main amd64 Packages 
500 https://download.mono-project.com/repo/ubuntu stable-xenial/main i386 Packages
amrghazr
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  • From the version numbers, it looks like you are trying to install something ancient (pre-12.04). That is likely to introduce a version conflict...which is exactly what it looks like you have. Something you already have installed requires different versions - that's the conflict. Use the apt cache policy command with those rejected packages to determine what the conflict is. – user535733 Sep 19 '18 at 20:36
  • This what i get running this command: libmono-system-web-extensions4.0-cil: Installed: (none) Candidate: 5.14.0.177-0xamarin3+ubuntu1604b1 Version table: 5.14.0.177-0xamarin3+ubuntu1604b1 500 500 https://download.mono-project.com/repo/ubuntu stable-xenial/main amd64 Packages 500 https://download.mono-project.com/repo/ubuntu stable-xenial/main i386 Packages – amrghazr Sep 19 '18 at 20:54
  • Welcome to Ask Ubuntu! Could you please [edit] your question to include the output of apt-cache policy libmono-system-web-extensions4.0-cil libmono-system-drawing4.0-cil libmono-system-servicemodel4.0a-cil libmono-system-web-services4.0-cil libmono-system-web4.0-cil? Thanks. – David Foerster Sep 19 '18 at 21:12

1 Answers1

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Try running sudo apt install -f to fix broken packages.

That gives this output:

E: Sub-process /usr/bin/dpkg returned an error code (1)
Pilot6
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Mohsen Ibrahim
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