Protobuf Problem after installation

[eislerMeinName]

Hey,
I have just installed everything like shown. gazebo works fine when initialized with $ gazebo. But i tried rosrun gazebo_ros gazebo and got this error:
libprotobuf ERROR google/protobuf/descriptor_database.cc:58] File already exists in database: ignition/msgs/header.proto
[libprotobuf FATAL google/protobuf/descriptor.cc:1358] CHECK failed: GeneratedDatabase()->Add(encoded_file_descriptor, size):
terminate called after throwing an instance of 'google::protobuf::FatalException'
what(): CHECK failed: GeneratedDatabase()->Add(encoded_file_descriptor, size):
[libprotobuf ERROR google/protobuf/descriptor_database.cc:58] File already exists in database: ignition/msgs/header.proto
[libprotobuf FATAL google/protobuf/descriptor.cc:1358] CHECK failed: GeneratedDatabase()->Add(encoded_file_descriptor, size):
terminate called after throwing an instance of 'google::protobuf::FatalException'
what(): CHECK failed: GeneratedDatabase()->Add(encoded_file_descriptor, size):
Aborted (core dumped)

I am not sure how to solve this problem. I hope that you can help me.

Eisler