On 09/03/2013 03:26 PM, Matthias Goldhoorn wrote: > i assume this is a mistake within the attribute_missing implementation > of composition... > > try to add (.to_s) to syskit/lib/syskit/composition.rb line 256 > > 256 port_name = $1.to_s $1 is guaranteed to be a string A backtrace would be great. Sylvain