I am running one of the latest versions of Monodevelop on Linux Mint which used to work before I formatted my drive and made a fresh install. When I build my project it builds fine, but when I try to run it I get the following message:
Could not launch ASP.NET web server.
The xsp4 web server cannot be found. Please ensure that it is installed.
I have xsp4 and xsp4-base packages installed. I found in a question and answer on askubuntu that I need to switch the Mono runtime to make it able to find xsp4.
When I go to Edit > Preferences > Projects > .NET Runtimes I see the options Mono 3.10.0 (Default) and Mono 3.10.0 (/usr). Unfortunately, when I switch to the /usr one (the one I need and should work) I get the same error as above that the web server cannot be found. And now the weird part: when I look again in the .NET runtimes options I see that is has switched the default back to the original one.
The switching back to another default only happens after I press F5 and try to build the solution (both with release and debug).
Does anyone know how I can fix this?
Answers:
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Method 1
In case we’re running an ASP.NET application on Mono using Monodevelop for the first time, we may receive the below error:
In some cases, the problem is incorrect installation of xsp4 server.
Install it using:
sudo apt-get install mono-xsp4
This solved the above error.
Optional: get it from Ubuntu software center by searching for xsp4
Extra: For Arch (or based like Manjaro…) use yaourt -S xsp.
All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0