13:23:50 : [fs] Unable to open file for reading. (/vehicle/trailer_eu/kuebler/pipe.dif_spec.add.env.mat)
13:23:50 : [material] Can not open '/vehicle/trailer_eu/kuebler/pipe.dif_spec.add.env.mat'
13:23:51 : Reflectivity / env_factor ought be non-zero - fix the source of material '/vehicle/trailer_eu/kuebler/container.dif_spec.add.env.mat'. ?? auf ein helfe
13:23:50 : [material] Can not open '/vehicle/trailer_eu/kuebler/pipe.dif_spec.add.env.mat'
13:23:51 : Reflectivity / env_factor ought be non-zero - fix the source of material '/vehicle/trailer_eu/kuebler/container.dif_spec.add.env.mat'. ?? auf ein helfe