Exc: Replace with cb+ret

smocore/body/body.cpp

@@ -177,8 +177,10 @@ void Body::finalizeReq(bodyLifetimeMgmtOpCbFn callback)
 
 	if (mrntt->id != ComponentThread::MRNTT)
 	{
-		throw std::runtime_error(std::string(__func__)
+		std::cerr << __func__ << ": Must be invoked by Mrntt thread"
-			+ ": Must be invoked by Mrntt thread");
+		          << std::endl;
+		callback(false);
+		return;
 	}
 
 	if (!parent.bodyComponentInitialized)