AttributeError: 'Server' object has no attribute 'handles'

Question

Hi, I installed cadabra again in Fedora 25 via GitHub, but when I am going to run the Beginners tutorial file, an error appears:

Traceback (most recent call last): File "", line 1, in File "cadabra2_defaults.py", line 132, in display if server.handles('latex_view'): AttributeError: 'Server' object has no attribute 'handles'

This error appears when I compile the lines: F{\mu\nu}::AntiSymmetric; F{\mu\nu}::Depends(x). A_{\mu}::Depends(x,\partial{#}). \delta{#}::Accent;

I did the installation of Cadabra again because I wanted to work with the new version 2.1.5. Can you give some advise about how fix the problem? Thanks.

Answer 1

This looks like some of the old installation got mixed with the new one. Most likely, there is a 'cadabra2.so' floating around somewhere which belongs to the old installation. Try locate cadabra2.so and delete all the files you find that way, then run sudo make install again from the build directory.