example f_min.py DIRECT error

[Schraivogel]

Hi,
seems like i have a similar problem with the DIRECT library. Running RoBO on a virtual x64 ubuntu machine using python3.4 within a venv. Any ideas what I can do? example_blr.py runs...
...
INFO:robo.solver.bayesian_optimization:Maximize acquisition function...
Call-back cb_fcn_in_direct__user__routines failed.
Traceback (most recent call last):
File "example_fmin.py", line 22, in
results = bayesian_optimization(objective_function, lower, upper, num_iterations=50)
File "/home/student/Documents/venv/RoBo/lib/python3.4/site-packages/RoBO-0.2.1-py3.4.egg/robo/fmin/bayesian_optimization.py", line 133, in bayesian_optimization
File "/home/student/Documents/venv/RoBo/lib/python3.4/site-packages/RoBO-0.2.1-py3.4.egg/robo/solver/bayesian_optimization.py", line 167, in run
File "/home/student/Documents/venv/RoBo/lib/python3.4/site-packages/RoBO-0.2.1-py3.4.egg/robo/solver/bayesian_optimization.py", line 245, in choose_next
File "/home/student/Documents/venv/RoBo/lib/python3.4/site-packages/RoBO-0.2.1-py3.4.egg/robo/maximizers/direct.py", line 69, in maximize
File "/home/student/Documents/venv/RoBo/lib/python3.4/site-packages/DIRECT/init.py", line 202, in solve
cdata
ValueError: data type must provide an itemsize

Thanks,
Stephan

[aaronkl]

Hi, the problem is that by default we suppress DIRECTs output to unclutter RoBOs console output. It seems that this leads to problems on some OS systems. I changed RoBOs default verbosity level such that it prints DIRECTs output. Could you pull the master branch and try it again?

[Schraivogel]

Hi,
thanks for the tip. It didn't resolve the error though... Must be an issue on my machine.