# DiffEqOperators and DifferentialEquations: solving a coupled system of PDEs

**URL:** https://discourse.julialang.org/t/diffeqoperators-and-differentialequations-solving-a-coupled-system-of-pdes/74722
**Category:** Numerics
**Tags:** differentialequation
**Created:** [January 17, 2022, 12:49am UTC](https://discourse.julialang.org/t/diffeqoperators-and-differentialequations-solving-a-coupled-system-of-pdes/74722 "2022-01-17T00:49:51Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![ChrisRackauckas](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/chrisrackauckas/32/77_2.png) [@ChrisRackauckas](https://discourse.julialang.org/u/ChrisRackauckas)
#### Post date: [January 17, 2022, 12:47pm UTC](https://discourse.julialang.org/t/diffeqoperators-and-differentialequations-solving-a-coupled-system-of-pdes/74722/2 "2022-01-17T12:47:23Z")

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That looks like a broadcasting issue on your side. It shouldn’t be itereating the DiffEqOperator but it is, so somewhere you have a `.*` where it should be `*`.

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