# Cannot install Cremona database

Tried to install big Cremona database via !Sage command. Syntax error was returned.

Cannot install Cremona database

asked **
2015-01-19 21:02:45 -0600
**

Anonymous

Tried to install big Cremona database via !Sage command. Syntax error was returned.

1

You should provide more details. Which command did you type ? Which error did you get ?

Without more informations, you can try the standard way: from a terminal (not Sage):

```
sage -i database_cremona_ellcurve
```

It works for me.

Note that currently you can not install packages via Sage command line nor Sage notebook, see trac ticket 16759.

**EDIT:** If you are using the virtual machine under windoz, you can switch to a terminal by pressing **Right-Ctrl** and **F1**. See this page for more details.

Thank you very much for your answer. I tried to install the Cremona database via Sage notebook with the command : !sage -i database_cremona_ellcurve That did not work. I got an syntax error. I am using Windows 7 professional with Oracle VM Virtualbox Manager. How do I access the terminal in a Windows environment ? Thank you again for your help.

I found the terminal. Thank you very much. Unfortunately there are new errors while installing the Cremona database. tar: src/cremona.db: Wrote only 1024 of 10240 bytes tar: Exiting with failure status due to previous errors Error: failed to extract /home/sage/sage-6.4.1/upstream/database_cremona_ellcurve-20140829.tar.bz2 Can you help again ? Thank you in advance !

Hi, Dima. Thank you very much for your comment. After running the df -h command, I see on Filesystem /dev/sda2 Size 6.8G Used 6.4G Use% 100%. Since I use the Oracle VM the first time, I dont have any experience with it. Do you know how big is the Cremona database and how much space there should be in VM ? How do I allolcate it? Thank you in advance.

Asked: **
2015-01-19 21:02:45 -0600
**

Seen: **222 times**

Last updated: **Jan 21 '15**

Stein-Watkins Database of Elliptic Curves

Iterating over all non isomorphic connected graphs of given order

name of the curve in Cremona's database

Finding Cremona label of the elliptic curve $y^2 = x^3 - x^2 - 1008x + 48512$

Finding Cremona label for Tunnell's y^2-x^3-n^2x

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What OS? What version of Sage? What command did you run?