# Can't add any package
**URL:** https://discourse.julialang.org/t/cant-add-any-package/55753
**Category:** General Usage
**Tags:** question, package
**Created:** [February 22, 2021, 12:38am UTC](https://discourse.julialang.org/t/cant-add-any-package/55753 "2021-02-22T00:38:11Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@HoldenCaulfield](https://discourse.julialang.org/u/HoldenCaulfield)
#### Post date: [February 22, 2021, 12:38am UTC](https://discourse.julialang.org/t/cant-add-any-package/55753/1 "2021-02-22T00:38:11Z")
Hello. I suddenly realized that I cannot add any Julia packages. For instance, when I try `using Pkg; Pkg.add("Revise")` I get the following error (I have Julia 1.5.3 installed and been able to add packages a few days ago without any problems):
```julia
ERROR: The following package names could not be resolved:
* Revise (not found in project, manifest or registry)
Stacktrace:
[1] pkgerror(::String) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Types.jl:52
[2] ensure_resolved(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}; registry::Bool) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\Types.jl:837
[3] add(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}; preserve::Pkg.Types.PreserveLevel, platform::Pkg.BinaryPlatforms.Windows, kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:177
[4] add(::Pkg.Types.Context, ::Array{Pkg.Types.PackageSpec,1}) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:139
[5] #add#21 at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:67 [inlined]
[6] add at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:67 [inlined]
[7] #add#20 at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:66 [inlined]
[8] add at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:66 [inlined]
[9] add(::String; kwargs::Base.Iterators.Pairs{Union{},Union{},Tuple{},NamedTuple{(),Tuple{}}}) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:65
[10] add(::String) at C:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.5\Pkg\src\API.jl:65
[11] top-level scope at REPL[9]:1
```
Any help would be greatly appreciated!
---
### Author:  [@zhangliye](https://discourse.julialang.org/u/zhangliye)
#### Post date: [February 22, 2021, 2:06am UTC](https://discourse.julialang.org/t/cant-add-any-package/55753/2 "2021-02-22T02:06:33Z")
If it is really difficult to solve, just remove the `~/.julia` directory. Then, install the needed package. This can solve most problems related to Pkg.
---
### Author:  [@HoldenCaulfield](https://discourse.julialang.org/u/HoldenCaulfield)
#### Post date: [February 22, 2021, 2:22am UTC](https://discourse.julialang.org/t/cant-add-any-package/55753/3 "2021-02-22T02:22:29Z")
Thanks! Could you please tell me how can I find `~/.julia` directory in Windows 10? And If I remove the directory, will I lose my previously installed packages?
---
### Author:  [@zhangliye](https://discourse.julialang.org/u/zhangliye)
#### Post date: [February 22, 2021, 2:34am UTC](https://discourse.julialang.org/t/cant-add-any-package/55753/4 "2021-02-22T02:34:05Z")
For the linux and Mac system, it is located in `~/.julia`. For the windows system, it is usually `c:/users/your_user_name/.julia`
---
### Author:  [@HoldenCaulfield](https://discourse.julialang.org/u/HoldenCaulfield)
#### Post date: [February 22, 2021, 5:14am UTC](https://discourse.julialang.org/t/cant-add-any-package/55753/5 "2021-02-22T05:14:35Z")
Many thanks! Your solution worked!