# RData. UndefVarError: identifier not defined

**URL:** <https://discourse.julialang.org/t/rdata-undefvarerror-identifier-not-defined/39276>\
**Category:** General Usage\
**Tags:** question, package\
**Created:** [May 11, 2020, 11:19am UTC](https://discourse.julialang.org/t/rdata-undefvarerror-identifier-not-defined/39276 "2020-05-11T11:19:04Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![marinooss](https://avatars.discourse-cdn.com/v4/letter/m/f4b2a3/32.png) [@marinooss](https://discourse.julialang.org/u/marinooss)\
**Post date:** [May 11, 2020, 11:19am UTC](https://discourse.julialang.org/t/rdata-undefvarerror-identifier-not-defined/39276/1 "2020-05-11T11:19:05Z")

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load(“working\_data//hospital\_demand\_other\_jl.RData”)

got the error:

**UndefVarError: identifier not defined**

Also, when loading the package RData I got:  
WARNING: could not import DataFrames.identifier into RData

How to fix this?

Julia Version 1.4.1  
Commit 381693d3df\* (2020-04-14 17:20 UTC)  
Platform Info:  
OS: Windows (x86\_64-w64-mingw32)  
CPU: Intel(R) Xeon(R) W-2104 CPU @ 3.20GHz  
WORD\_SIZE: 64  
LIBM: libopenlibm  
LLVM: libLLVM-8.0.1 (ORCJIT, skylake)  
Environment:  
JULIA\_EDITOR = “C:\ProgramData\oms9\atom\app-1.46.0\atom.exe” -a

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<div class="post-metadata">

**Author:** ![oliver](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/oliver/32/19264_2.png) [@oliver](https://discourse.julialang.org/u/oliver)\
**Post date:** [May 16, 2020, 12:46pm UTC](https://discourse.julialang.org/t/rdata-undefvarerror-identifier-not-defined/39276/2 "2020-05-16T12:46:29Z")

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Isn’t the extension `.rda` rather than `.RData`?

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<div class="post-metadata">

**Author:** ![bkamins](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/bkamins/32/208538_2.png) [@bkamins](https://discourse.julialang.org/u/bkamins)\
**Post date:** [May 16, 2020, 1:02pm UTC](https://discourse.julialang.org/t/rdata-undefvarerror-identifier-not-defined/39276/3 "2020-05-16T13:02:50Z")

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The fix to this is already on RData.jl master, so just install this version and all should work fine. The problem is that RData.jl version containing this fix has not been released yet.