# Basic problem with specifying dependencies

**URL:** <https://discourse.julialang.org/t/basic-problem-with-specifying-dependencies/63704>\
**Category:** New to Julia\
**Tags:** question, package\
**Created:** [June 28, 2021, 4:18pm UTC](https://discourse.julialang.org/t/basic-problem-with-specifying-dependencies/63704 "2021-06-28T16:18:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![PedroOS](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/pedroos/32/5712_2.png) [@PedroOS](https://discourse.julialang.org/u/PedroOS)\
**Post date:** [June 28, 2021, 4:18pm UTC](https://discourse.julialang.org/t/basic-problem-with-specifying-dependencies/63704/1 "2021-06-28T16:18:56Z")

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Hi there, I have this recurring error pattern which I can’t seem to “grok” from the Packages documentation so I’ll ask. I load my package with `import MyPackage`, then I get

```julia
 Warning: Package MyPackage does not have Dates in its dependencies:
│ - If you have MyPackage checked out for development and have
│ added Dates as a dependency but haven't updated your primary
│ environment's manifest file, try `Pkg.resolve()`.
│ - Otherwise you may need to report an issue with MyPackage
└ Loading Dates into MyPackage from project dependency, future warnings for MyPackage are suppressed.
ERROR: LoadError: LoadError: ArgumentError: Package MyPackage does not have OrderedCollections in its dependencies:
- If you have MyPackage checked out for development and have
  added OrderedCollections as a dependency but haven't updated your primary
  environment's manifest file, try `Pkg.resolve()`.
- Otherwise you may need to report an issue with MyPackage

```

The package is in local development using `dev myPackage`. I then use `activate MyPackage` in Package mode (because I launch Julia from a shortcut where I can’t specify a specific project). Then, I add those packages: `add Dates`, `add OrderedCollections`, etc. Then, I re-import `MyPackage` and it works.

Then, after I close and restart Julia (I’m on Windows), I get those same errors again. I check both my `Manifest.toml` and `Project.toml` files and both dependencies are listed in there. What am I doing wrong?

Also, why is the first instance of the problem (for `Dates`) a warning, but the second one (for `OrderedCollections`) an error?

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<div class="post-metadata">

**Author:** ![jling](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jling/32/212909_2.png) [@jling](https://discourse.julialang.org/u/jling)\
**Post date:** [June 28, 2021, 4:33pm UTC](https://discourse.julialang.org/t/basic-problem-with-specifying-dependencies/63704/2 "2021-06-28T16:33:31Z")

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after `add`ing those to your pkg’s Project.toml, you need to do resolve in your main environment, not when `active MyPackage`. You can do an empty `]activate` to come back