# Trying to solve a second order differential eqution

**URL:** <https://discourse.julialang.org/t/trying-to-solve-a-second-order-differential-eqution/41160>\
**Category:** Visualization\
**Created:** [June 10, 2020, 8:42pm UTC](https://discourse.julialang.org/t/trying-to-solve-a-second-order-differential-eqution/41160 "2020-06-10T20:42:20Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![aquarelle332](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/aquarelle332/32/20816_2.png) [@aquarelle332](https://discourse.julialang.org/u/aquarelle332)\
**Post date:** [June 10, 2020, 8:42pm UTC](https://discourse.julialang.org/t/trying-to-solve-a-second-order-differential-eqution/41160/1 "2020-06-10T20:42:21Z")

</div>

Hello,

Each time that I am trying to use PGFPlotsX (sinc a few days) I obtain this kind of error:

```julia
ERROR: LoadError: ArgumentError: Package PGFPLotsX not found in current path:
- Run `import Pkg; Pkg.add("PGFPLotsX")` to install the PGFPLotsX package.

```

The package is installed howver.

---

<div class="post-metadata">

**Author:** ![stillyslalom](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/stillyslalom/32/45687_2.png) [@stillyslalom](https://discourse.julialang.org/u/stillyslalom)\
**Post date:** [June 10, 2020, 10:22pm UTC](https://discourse.julialang.org/t/trying-to-solve-a-second-order-differential-eqution/41160/2 "2020-06-10T22:22:02Z")

</div>

It’s just a typo: you’re trying to load `PGFPLotsX` (note the capitalized `L`), but the package is called `PGFPlotsX`.

---

<div class="post-metadata">

**Author:** ![dpsanders](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/dpsanders/32/3573_2.png) [@dpsanders](https://discourse.julialang.org/u/dpsanders)\
**Post date:** [June 11, 2020, 2:47am UTC](https://discourse.julialang.org/t/trying-to-solve-a-second-order-differential-eqution/41160/3 "2020-06-11T02:47:39Z")

</div>

You can avoid errors like this by using tab completion.

---

<div class="post-metadata">

**Author:** ![aquarelle332](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/aquarelle332/32/20816_2.png) [@aquarelle332](https://discourse.julialang.org/u/aquarelle332)\
**Post date:** [June 11, 2020, 8:01am UTC](https://discourse.julialang.org/t/trying-to-solve-a-second-order-differential-eqution/41160/4 "2020-06-11T08:01:34Z")

</div>

Thanks for your replies.  
It’s true: the package is called `PGFPlotsX` .  
(If my recollection is good I copied with the mouse and paste with mouse button…)