Error message when I load xPPN, xIST, xPand... packages

[тчеорист]

Dear all,

I'm using xAct on my Mathematica 12.3 running on Ubuntu LTS 20.04 and I've tried recently to install the other additional packages like: xPPN, xIST, xPand...etc, but when I run them all I got is an error message.

Get::Failed

Note that I followed the installation guide carefully and I don't have this issue when I load xTensor or xTras packages for eg.

Please let me know if there's something very basic that I'm missing.

Thank you in advance!

Youcef Kehal

[Jose]

Hi,

Some of the xAct packages are not included in the xAct distribution, in particular those three you mention. There are links to all of them in the main page http://xact.es/ . The packages code must always be placed inside the xAct folder, where you already have xTensor, xCoba, xTras, etc.

If you have problems downloading any package, I suggest you contact the respective author(s), or report the problem here.

Cheers,

Jose.