# Pluto：Failed to show value

**URL:** <https://discourse.julialang.org/t/pluto-failed-to-show-value/92231>\
**Category:** Pluto\
**Tags:** question\
**Created:** [December 28, 2022, 3:20pm UTC](https://discourse.julialang.org/t/pluto-failed-to-show-value/92231 "2022-12-28T15:20:10Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Wuyao](https://avatars.discourse-cdn.com/v4/letter/w/a9a28c/32.png) [@Wuyao](https://discourse.julialang.org/u/Wuyao)\
**Post date:** [December 28, 2022, 3:20pm UTC](https://discourse.julialang.org/t/pluto-failed-to-show-value/92231/1 "2022-12-28T15:20:10Z")

</div>

Hi,I am on a Windows 10 machine,Julia 1.8.3,Pluto 0.19.19.  
when using Symbolics to take the derivative of a vector variables in Pluto,I saw the following message:

```julia
Failed to show value:
MethodError: no method matching size(::Symbol)

```

The code is

```julia
begin
	using Symbolics
    @variables t x[1:10] 
	D=Differential(t)
	D(x)
end

```