I work with 'Sage Version 4.6, Release Date: 2010-10-30' on a Mac OS X
10.6.5.

I have some problems interfacing with Pari, probably due to my
inexperience. Could you please tell me why do I get the errors below?

sage: E = pari('ellinit([0,0,1,-1,0])')

sage: pari('a=ellan(E,1000)')

---------------------------------------------------------------------------
PariError                                 Traceback (most recent call
last)

/Users/vrotger/<ipython console> in <module>()

/Applications/sage/local/lib/python2.6/site-packages/sage/libs/pari/
gen.so in sage.libs.pari.gen._pari_trap (sage/libs/pari/gen.c:46286)()

PariError:  (5)
-------------------------------------------

I know I can instead do the following, which works:
sage: a=pari(E.ellan(1000))

But then the line below produces again a similar error:

sage: pari('sum(n=1,5,a[n]*q^n)')
---------------------------------------------------------------------------
PariError                                 Traceback (most recent call
last)

/Users/vrotger/<ipython console> in <module>()

/Applications/sage/local/lib/python2.6/site-packages/sage/libs/pari/
gen.so in sage.libs.pari.gen._pari_trap (sage/libs/pari/gen.c:46286)()

PariError:  (5)
---

Why?

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