Failed to append solution in special 7-bar problem

[d-torrance]

I'm getting the following test error after building PHCpy in Ubuntu 21.04:

Python 3.9.4 (default, Apr  4 2021, 19:38:44) 
[GCC 10.2.1 20210401] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import phcpy
PHCv2.4.84 released 2020-02-26 works!
>>> phcpy.examples.solve_sevenbar()

solving a special 7-bar problem...
Failed to append solution t :  1.00011235011606E-02   0.00000000000000E+00
m : 1
the solution for t :
 t1 :  NaN*****************   NaN*****************
 t2 :  NaN*****************   NaN*****************
 t3 :  NaN*****************   NaN*****************
 t6 :  NaN*****************   NaN*****************
 t4 :  NaN*****************   NaN*****************
 t5 :  NaN*****************   NaN*****************
 zz1 :  NaN*****************   NaN*****************
== err :  NaN****** = rco :  NaN****** = res :  NaN****** =.
Solution at position 17 is not appended.
Failed to append solution t :  2.00011235011606E-02   0.00000000000000E+00
m : 1
the solution for t :
 t1 :  NaN*****************   NaN*****************
 t2 :  NaN*****************   NaN*****************
 t3 :  NaN*****************   NaN*****************
 t6 :  NaN*****************   NaN*****************
 t4 :  NaN*****************   NaN*****************
 t5 :  NaN*****************   NaN*****************
 zz1 :  NaN*****************   NaN*****************
== err :  NaN****** = rco :  NaN****** = res :  NaN****** =.
Solution at position 28 is not appended.
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/phcpy/examples.py", line 1009, in solve_sevenbar
    assert len(sols[1][1]) == 3
AssertionError

[janverschelde]

Thanks for reporting this issue. I have not yet tested phcpy with python 3.9
What happens if you do
from phcpy.examples import test
test()
In that test(), the sevenbar problem is solve with a fixed seed of the random number generator.

[d-torrance]

What happens if you do
from phcpy.examples import test
test()
In that test(), the sevenbar problem is solve with a fixed seed of the random number generator.

Same problem. (Running test() is how I found this issue to begin with. All the other tests it runs were successful.)