# Rterm.exe - Entry Point Not Found

**URL:** <https://igraph.discourse.group/t/rterm-exe-entry-point-not-found/1326>\
**Category:** Installation\
**Tags:** R\
**Created:** [12 August 2022 06:33 UTC](https://igraph.discourse.group/t/rterm-exe-entry-point-not-found/1326 "2022-08-12T06:33:26Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Chris\_Williams](https://yyz2.discourse-cdn.com/free1/user_avatar/igraph.discourse.group/chris_williams/32/820_2.png) [@Chris\_Williams](https://igraph.discourse.group/u/Chris_Williams)\
**Post date:** [12 August 2022 06:33 UTC](https://igraph.discourse.group/t/rterm-exe-entry-point-not-found/1326/1 "2022-08-12T06:33:26Z")

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I am running R 4.1.3 and have installed igraph 1.3.4 from CRAN using `install.packages("igraph")`  
. The installation went smoothly.

The problem comes when I try to load the package. As soon as I try to run `library(igraph)`  
I get a popup error with the same title as this post, and a body of  
“The procedure entry point quadmath\_snprintf could not be located in the dynamic link library C:\Users\Christopher\Documents\R\win-library\4.1\igraph\libs\x64\igraph.dll.”

 ![igraph_entrypoint_error](https://global.discourse-cdn.com/free1/uploads/igraph/original/1X/80504ddf5416b9c76850b609c8b946b1cf7443fb.png)

Thank you for any and all help

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**Author:** ![tamas](https://yyz2.discourse-cdn.com/free1/user_avatar/igraph.discourse.group/tamas/32/1261_2.png) [@tamas](https://igraph.discourse.group/u/tamas)\
**Post date:** [12 August 2022 08:41 UTC](https://igraph.discourse.group/t/rterm-exe-entry-point-not-found/1326/2 "2022-08-12T08:41:07Z")

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Is this the official R downloaded from [https://www.r-project.org/](https://www.r-project.org/) or an alternative version (like Anaconda R or Microsoft R Open)?

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<div class="post-metadata">

**Author:** ![Chris\_Williams](https://yyz2.discourse-cdn.com/free1/user_avatar/igraph.discourse.group/chris_williams/32/820_2.png) [@Chris\_Williams](https://igraph.discourse.group/u/Chris_Williams)\
**Post date:** [12 August 2022 18:49 UTC](https://igraph.discourse.group/t/rterm-exe-entry-point-not-found/1326/3 "2022-08-12T18:49:43Z")

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I think the issue is that I have both installed on my system. I have the official R installed and that is version 4.1.0. Then I am working in an anaconda environment that has 4.1.3 installed, and that is where I am working in the above screenshot.

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<div class="post-metadata">

**Author:** ![tamas](https://yyz2.discourse-cdn.com/free1/user_avatar/igraph.discourse.group/tamas/32/1261_2.png) [@tamas](https://igraph.discourse.group/u/tamas)\
**Post date:** [13 August 2022 14:04 UTC](https://igraph.discourse.group/t/rterm-exe-entry-point-not-found/1326/4 "2022-08-13T14:04:51Z")

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Okay, that’s the reason then. You cannot take igraph compiled for CRAN R and use it in Anaconda R. igraph in the CRAN R distribution requires that `Rlapack.dll` provides a function named `quadmath_snprintf`, which is not present in Anaconda R for some reason. You need to install igraph for Anaconda R from `conda-forge` instead; see [R Igraph :: Anaconda.org](https://anaconda.org/conda-forge/r-igraph) . This version is compiled with and for Anaconda R so presumably it will work without problems. (We do not officially support Anaconda R).