<div dir="ltr"><div class="gmail_default" style="font-family:arial,sans-serif">Hi,</div><div class="gmail_default" style="font-family:arial,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,sans-serif">I am trying to build Einstein Toolkit on my laptop with Ubuntu 18.04, i5 8th Gen using the instructions on the git page: <a href="https://github.com/nds-org/jupyter-et/blob/master/CactusTutorial.ipynb">https://github.com/nds-org/jupyter-et/blob/master/CactusTutorial.ipynb</a></div><div class="gmail_default" style="font-family:arial,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,sans-serif">While building the toolkit using  <span style="background-color:rgb(247,247,247);color:rgb(51,51,51);font-family:Arial,Helvetica,sans-serif;font-size:14px;white-space:pre-wrap">./simfactory/bin/sim build -j&lt;N&gt; --thornlist ../<a href="http://einsteintoolkit.th">einsteintoolkit.th</a></span><span style="font-family:Arial,Helvetica,sans-serif">, where I used N=2, I get the following error:</span></div><div class="gmail_default" style="font-family:arial,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,sans-serif">------------------------------------------------------<br>There were 3 errors during execution of the CST<br>These must be corrected before compilation can proceed<br>------------------------------------------------------<br><br><br><br>------------------------------------------------------<br>Warnings were generated during execution of the CST<br>------------------------------------------------------<br><br><br>CST error in /home/abhishek/Cactus/lib/sbin/CST (at 322)<br>  -&gt; Missing thorn ExternalLibraries/BLAS<br><br><br>CST error 2:<br>  -&gt; Thorn &#39;LAPACK&#39; requires the capability &#39;BLAS&#39;.<br>     Please add a thorn that provides &#39;BLAS&#39; to your ThornList or remove &#39;LAPACK&#39; from it !<br><br><br>CST error 3:<br>  -&gt; Thorn &#39;LORENE&#39; requires the capability &#39;BLAS&#39;.<br>     Please add a thorn that provides &#39;BLAS&#39; to your ThornList or remove &#39;LORENE&#39; from it !<br><br>------------------------------------------------------<br><br>/home/abhishek/Cactus/lib/make/make.configuration:212: recipe for target &#39;/home/abhishek/Cactus/configs/sim/config-data/make.thornlist&#39; failed<br>make[1]: *** [/home/abhishek/Cactus/configs/sim/config-data/make.thornlist] Error 1<br>Makefile:260: recipe for target &#39;sim&#39; failed<br>make: *** [sim] Error 2<br></div><div><br></div><div><div class="gmail_default" style="font-family:arial,sans-serif">Can anyone please provide some insight on how to proceed from here to solve this?</div><div class="gmail_default" style="font-family:arial,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,sans-serif">Thanks!</div><div class="gmail_default" style="font-family:arial,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,sans-serif">Abhishek<br></div><br></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><font face="arial, sans-serif" size="1">Abhishek Chattaraj</font><div><font face="arial, sans-serif" size="1">Department Of Physics</font></div><div><font face="arial, sans-serif" size="1">Indian Institute Of Technology Madras</font></div><div><font face="arial, sans-serif" size="1">Chennai 600036</font></div><div><font face="arial, sans-serif" size="1">India</font></div></div></div></div></div></div></div></div></div></div></div></div></div></div>