# DimensionMismatch ("A has dimensions (1, 0) but B has dimensions (5,)") How to eliminate this error?

**URL:** https://discourse.julialang.org/t/dimensionmismatch-a-has-dimensions-1-0-but-b-has-dimensions-5-how-to-eliminate-this-error/12741
**Category:** Optimization (Mathematical)
**Created:** [July 30, 2018, 2:52pm UTC](https://discourse.julialang.org/t/dimensionmismatch-a-has-dimensions-1-0-but-b-has-dimensions-5-how-to-eliminate-this-error/12741 "2018-07-30T14:52:34Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![ggggggggg](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/ggggggggg/32/265_2.png) [@ggggggggg](https://discourse.julialang.org/u/ggggggggg)
#### Post date: [July 30, 2018, 3:33pm UTC](https://discourse.julialang.org/t/dimensionmismatch-a-has-dimensions-1-0-but-b-has-dimensions-5-how-to-eliminate-this-error/12741/2 "2018-07-30T15:33:12Z")

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You’re more likely to get useful feedback if you can provide a small copy and pasteable example that demonstrates the problem. Also be sure to [quote your code](https://discourse.julialang.org/t/psa-how-to-quote-code-with-backticks/7530) when you do so.

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_[View the full topic](https://discourse.julialang.org/t/dimensionmismatch-a-has-dimensions-1-0-but-b-has-dimensions-5-how-to-eliminate-this-error/12741)._