IronWorker log shows this output:
get file from AWS
TODO: Call solver with file at cube.stl
/mnt/task/solver_worker.rb:7:in `exec': Permission denied - solver/sns (Errno::EACCES)
from /mnt/task/solver_worker.rb:7:in `<top (required)>'
from /usr/local/lib/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from /usr/local/lib/site_ruby/1.9.1/rubygems/custom_require.rb:36:in `require'
from __runner__.rb:224:in `<main>'
total 12