Hey! I am currently working on a project, where I need to serialize data with ProtocolBuffers. I have managed to compile a .proto file and serialize messages with messagePut. However, when I try to deserialize a ByteString again, I get the following error: ambiguous type variable `msg0' in the constraints: (Text.ProtocolBuffers.WireMessage.Wire msg0) arising from a use of "messageGet" at... (Text.ProtocolBuffers.Reflections.ReflectDescriptor msg0) arising from a use of "messageGet" at ... Probable fix: add a type signature that fixes these type variables in the expression "messageGet bs" in an equation for `IT': "IT = messageGet bs" I'm trying to call messageGet from the prompt in ghc. What exactly am I doing wrong? And how can I fix this? Many Thanks Raphael