# Problem in opening dataframe

**URL:** <https://discourse.julialang.org/t/problem-in-opening-dataframe/67043>\
**Category:** General Usage\
**Created:** [August 26, 2021, 3:28pm UTC](https://discourse.julialang.org/t/problem-in-opening-dataframe/67043 "2021-08-26T15:28:51Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Luigi\_Marongiu](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/luigi_marongiu/32/7909_2.png) [@Luigi\_Marongiu](https://discourse.julialang.org/u/Luigi_Marongiu)\
**Post date:** [August 26, 2021, 3:28pm UTC](https://discourse.julialang.org/t/problem-in-opening-dataframe/67043/1 "2021-08-26T15:28:51Z")

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Hello,  
I have been trying to open a tab delimited file as dataframe. My command was:

```julia
using DataFrames
using CSV
df = CSV.read(<file>, delim='\t', missingstring="NA", decimal='.', header = false; copycols=true)

```

Now I am using Julia Version 1.6.1 and I got this error:

```julia
julia> using DataFrames, CSV

julia> df = CSV.read("actual/JostData.tsv", Dataframe; 
           delim='\t', missingstring="NA", decimal=',', copycols=true)
ERROR: UndefVarError: Dataframe not defined
Stacktrace:
 [1] top-level scope
   @ none:1

```

What is the error?  
Thank you

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<div class="post-metadata">

**Author:** ![jling](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jling/32/212909_2.png) [@jling](https://discourse.julialang.org/u/jling)\
**Post date:** [August 26, 2021, 3:30pm UTC](https://discourse.julialang.org/t/problem-in-opening-dataframe/67043/2 "2021-08-26T15:30:48Z")

</div>

`DataFrame`

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<div class="post-metadata">

**Author:** ![Luigi\_Marongiu](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/luigi_marongiu/32/7909_2.png) [@Luigi\_Marongiu](https://discourse.julialang.org/u/Luigi_Marongiu)\
**Post date:** [August 26, 2021, 3:37pm UTC](https://discourse.julialang.org/t/problem-in-opening-dataframe/67043/3 "2021-08-26T15:37:07Z")

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even if I remove `Dataframe;` or `Dataframe` I still get an error…

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<div class="post-metadata">

**Author:** ![jling](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/jling/32/212909_2.png) [@jling](https://discourse.julialang.org/u/jling)\
**Post date:** [August 26, 2021, 3:40pm UTC](https://discourse.julialang.org/t/problem-in-opening-dataframe/67043/4 "2021-08-26T15:40:44Z")

</div>

Julia is case sensitive, `DataFrame` and `Dataframe` are not the same.

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<div class="post-metadata">

**Author:** ![Luigi\_Marongiu](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/luigi_marongiu/32/7909_2.png) [@Luigi\_Marongiu](https://discourse.julialang.org/u/Luigi_Marongiu)\
**Post date:** [August 26, 2021, 3:59pm UTC](https://discourse.julialang.org/t/problem-in-opening-dataframe/67043/5 "2021-08-26T15:59:54Z")

</div>

Yes, that was the problem. It works now!