# Using multiple dispatch with parametric constructors produces ambiguous call

**URL:** <https://discourse.julialang.org/t/using-multiple-dispatch-with-parametric-constructors-produces-ambiguous-call/44295>\
**Category:** General Usage\
**Created:** [August 4, 2020, 11:39pm UTC](https://discourse.julialang.org/t/using-multiple-dispatch-with-parametric-constructors-produces-ambiguous-call/44295 "2020-08-04T23:39:23Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![giordano](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/giordano/32/2166_2.png) [@giordano](https://discourse.julialang.org/u/giordano)\
**Post date:** [August 5, 2020, 10:38pm UTC](https://discourse.julialang.org/t/using-multiple-dispatch-with-parametric-constructors-produces-ambiguous-call/44295/4 "2020-08-05T22:38:57Z")

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> [@anon37204545](#):
>
> I thought adding that code would bloat the question.

Well, it’s pretty much the opposite: if you want help with code, you should very likely provide the code. As little as possible, but working code. See [Please read: make it easier to help you](https://discourse.julialang.org/t/psa-make-it-easier-to-help-you/14757) and [How to create a Minimal, Reproducible Example - Help Center - Stack Overflow](https://stackoverflow.com/help/minimal-reproducible-example). Your code doesn’t define `elementtuples` nor `charge`.

> [@anon37204545](#):
>
> As I noted, the error appears when calling `ChemEquation{Int}(str)` , also unrelated to `Compound` .

I guess you’re now talking about `Compound{Int}(str)` (what is `str`? I assume it’s any string)?

If you want to be helped, providing incomplete code with wrong references is not going to put people in the right mood.

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