Same from gp prompt:

? poldegree(ellmodulareqn(211)[1])
  ***   at top-level: poldegree(ellmodulareqn(211)[1])
  ***                           ^----------------------
*** ellmodulareqn: error opening seadata file: `/usr/share/pari/seadata/sea211'.
  ***   Break loop: type 'break' to go back to GP prompt

You're right, there's a permission issue:

ls -l /usr/share/pari/seadata/sea211
-rw-r--r-- 1 root root 194468 Sep 15 12:01 /usr/share/pari/seadata/sea211

Thanks.

On 9/16/20 2:45 PM, Dima Pasechnik wrote:
On Wed, Sep 16, 2020 at 1:33 PM Nicolo' Piazzalunga
<nicolopiazzalu...@gmail.com> wrote:

It was on a fresh install, see the attached config.log

does

poldegree(ellmodulareqn(211)[1])

work at the gp prompt, interactively (with the same user id as used
for running ./configure)
(more precisely, your gp is found in /bin/, so you might want to check
that /bin/gp and gp are the same
thing if run from the shell)

I guess it might be wrong file permissions for a part of
/usr/share/pari/ - as tests for other data packages there succeed

configure:17333: checking for gp
configure:17351: found /bin/gp
configure:17363: result: /bin/gp
configure:17377: checking for gphelp
configure:17395: found /bin/gphelp
configure:17407: result: /bin/gphelp
configure:17424: checking whether gphelp has access to the documentation
configure:17427: result: yes
configure:17439: checking is pari_elldata installed?
configure:17443: result: yes
configure:17454: checking is pari_galdata installed?
configure:17458: result: yes
configure:17469: checking is pari_galpol installed?
configure:17473: result: yes
configure:17484: checking is pari_seadata installed?
   ***   at top-level: poldegree(ellmodulareqn(211)[1])
   ***                           ^----------------------
   *** ellmodulareqn: error opening seadata file:
`/usr/share/pari/seadata/sea211'.

What are the permissions of /usr/share/pari/seadata/sea211 ?
(i.e. the output of
ls -l /usr/share/pari/seadata/sea211
please)




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