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FSI Start (programming.dev)

submitted 1 year ago by DrDeadCrash to c/vscode

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Hi everyone, I'm trying to try out F# via FSI in VS Code (Windows 10)

I have Ionide for F# installed, and have used it before, but now every time I try to start it I get a message "FSI :Start resulted in an error", it goes on to helpfully report "the option has no value".

dotnet is in path, dotnet works great. FSI? nothing.

I also have the .net workload installed for visual studio 2022 (if that matters).

I started up my Linux VM (KDE Neon) fired up vs codium and tried FSI Start...same error! So no tinkering in f# for me tonight. Does anyone have an idea what's happening, across two environments? Google is no help...

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[–] DrDeadCrash 2 points 1 year ago (1 children)

Hi, thank you for responding, sorry for my incomplete reply.

After running dotnet fsi on the command line, I tried in vs code again. FSI Start...and it worked!

So I don't know if it need a "first run" or something changed between last night and now....but oh well. Thank you for your help!

[–] Lodra 2 points 1 year ago

Oh awesome. Glad that worked for you!

Sounds like some kind of initial processing needs to run outside of vscode before it works normally. Might be worth reporting on github!