When I use Pkg.add(“IJulia”), I get back an error like this: [2018-08-13%2010-56-35%E5%B1%8F%E5%B9%95%E6%88%AA%E5%9B%BE]

Please do not send screenshots – just copy the code and put it in backticks. Which version of Julia is this?

Are you using Julia v1? I got a very similar error message when trying to install the Atom package. The new package manager has a different syntax. In REPL, start the package manager by typing ] then type add IJulia This worked for the Atom package in my case.

Could you run: rm(joinpath(homedir(), ".julia", "registries"); recursive=true) and try again? This is a bug in Pkg that should be fixed in 1.0.1

Thank you.This is v1.0. The error message: ERROR: The following package names could not be resolved: IJulia (not found in project, manifest or registry) Please specify by known name=uuid.

This really helps, thank you so much!

still after this solution ``` rm(joinpath(homedir(), “.julia”, “registries”); recursive=true)

This really solve the problem. However I met the same problem in Atom with Julia1.2.0.

Here just to confirm that for v1.1.0 this is still a bug.

i am facing the same error message when installing Diffeqpy in Julia on a littlest jupyterhub environment julia> rm(joinpath(homedir(), ".julia", "registries"); recursive=true) julia> import Pkg; Pkg.add("diffeqpy") Cloning default registries into /home/jupyter-devbox/.julia/registries Clo…

AFAICT diffeqpy is python package, not a julia package

Pkg.add("IJulia") can not work

Tooling

Topic		Replies	Views
ERROR: The following package names could not be resolved: General Usage	3	5697	July 16, 2019
IJulia install error (after installing Juno Atom IDE) New to Julia question	1	694	April 3, 2019
Error in Pkg.add: New to Julia pkg	14	4328	August 14, 2018
Outdated information in error, Pkg 3.0? General Usage	4	472	August 24, 2018
Error when Pkg.add("Julia") New to Julia	6	387	October 27, 2022

Pkg.add("IJulia") can not work

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