# Issue with PDMP and Forwardiff - DifferentialEquation

**URL:** https://discourse.julialang.org/t/issue-with-pdmp-and-forwardiff-differentialequation/17925
**Category:** Performance
**Tags:** diffeq
**Created:** [November 23, 2018, 8:17pm UTC](https://discourse.julialang.org/t/issue-with-pdmp-and-forwardiff-differentialequation/17925 "2018-11-23T20:17:25Z")
**Posts on this page:** 1
**Showing post:** 12

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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: [September 27, 2019, 11:24am UTC](https://discourse.julialang.org/t/issue-with-pdmp-and-forwardiff-differentialequation/17925/12 "2019-09-27T11:24:41Z")

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It looks like you need a call to `reshape` in the way you’re doing the dual cache? I’d have to dig in to find out why your integration is in 3D but the cache is 2D

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