diff --git a/gtsam_unstable/discrete/AllDiff.h b/gtsam_unstable/discrete/AllDiff.h
index 7f539f4c6..fb956146b 100644
--- a/gtsam_unstable/discrete/AllDiff.h
+++ b/gtsam_unstable/discrete/AllDiff.h
@@ -75,6 +75,22 @@ class GTSAM_UNSTABLE_EXPORT AllDiff : public Constraint {
 
   /// Get the number of non-zero values contained in this factor.
   uint64_t nrValues() const override { return 1; };
+
+  DiscreteFactor::shared_ptr sum(size_t nrFrontals) const override {
+    throw std::runtime_error("Not implemented");
+  }
+
+  DiscreteFactor::shared_ptr sum(const Ordering& keys) const override {
+    throw std::runtime_error("Not implemented");
+  }
+
+  DiscreteFactor::shared_ptr max(size_t nrFrontals) const override {
+    throw std::runtime_error("Not implemented");
+  }
+
+  DiscreteFactor::shared_ptr max(const Ordering& keys) const override {
+    throw std::runtime_error("Not implemented");
+  }
 };
 
 }  // namespace gtsam
diff --git a/gtsam_unstable/discrete/BinaryAllDiff.h b/gtsam_unstable/discrete/BinaryAllDiff.h
index 0e2fce109..fe04fd807 100644
--- a/gtsam_unstable/discrete/BinaryAllDiff.h
+++ b/gtsam_unstable/discrete/BinaryAllDiff.h
@@ -99,6 +99,22 @@ class BinaryAllDiff : public Constraint {
 
   /// Get the number of non-zero values contained in this factor.
   uint64_t nrValues() const override { return 1; };
+
+  DiscreteFactor::shared_ptr sum(size_t nrFrontals) const override {
+    throw std::runtime_error("Not implemented");
+  }
+
+  DiscreteFactor::shared_ptr sum(const Ordering& keys) const override {
+    throw std::runtime_error("Not implemented");
+  }
+
+  DiscreteFactor::shared_ptr max(size_t nrFrontals) const override {
+    throw std::runtime_error("Not implemented");
+  }
+
+  DiscreteFactor::shared_ptr max(const Ordering& keys) const override {
+    throw std::runtime_error("Not implemented");
+  }
 };
 
 }  // namespace gtsam
diff --git a/gtsam_unstable/discrete/Domain.h b/gtsam_unstable/discrete/Domain.h
index cd11fc8d9..1fbd7b110 100644
--- a/gtsam_unstable/discrete/Domain.h
+++ b/gtsam_unstable/discrete/Domain.h
@@ -114,6 +114,22 @@ class GTSAM_UNSTABLE_EXPORT Domain : public Constraint {
 
   /// Partially apply known values, domain version
   Constraint::shared_ptr partiallyApply(const Domains& domains) const override;
+
+  DiscreteFactor::shared_ptr sum(size_t nrFrontals) const override {
+    throw std::runtime_error("Not implemented");
+  }
+
+  DiscreteFactor::shared_ptr sum(const Ordering& keys) const override {
+    throw std::runtime_error("Not implemented");
+  }
+
+  DiscreteFactor::shared_ptr max(size_t nrFrontals) const override {
+    throw std::runtime_error("Not implemented");
+  }
+
+  DiscreteFactor::shared_ptr max(const Ordering& keys) const override {
+    throw std::runtime_error("Not implemented");
+  }
 };
 
 }  // namespace gtsam
diff --git a/gtsam_unstable/discrete/SingleValue.h b/gtsam_unstable/discrete/SingleValue.h
index 7f2eb2c2c..8dc7114ec 100644
--- a/gtsam_unstable/discrete/SingleValue.h
+++ b/gtsam_unstable/discrete/SingleValue.h
@@ -55,7 +55,7 @@ class GTSAM_UNSTABLE_EXPORT SingleValue : public Constraint {
   }
 
   /// Calculate value
-  double operator()(const DiscreteValues& values) const override;
+  double operator()(const Assignment<Key>& values) const override;
 
   /// Convert into a decisiontree
   DecisionTreeFactor toDecisionTreeFactor() const override;
@@ -80,6 +80,22 @@ class GTSAM_UNSTABLE_EXPORT SingleValue : public Constraint {
 
   /// Get the number of non-zero values contained in this factor.
   uint64_t nrValues() const override { return 1; };
+
+  DiscreteFactor::shared_ptr sum(size_t nrFrontals) const override {
+    throw std::runtime_error("Not implemented");
+  }
+
+  DiscreteFactor::shared_ptr sum(const Ordering& keys) const override {
+    throw std::runtime_error("Not implemented");
+  }
+
+  DiscreteFactor::shared_ptr max(size_t nrFrontals) const override {
+    throw std::runtime_error("Not implemented");
+  }
+
+  DiscreteFactor::shared_ptr max(const Ordering& keys) const override {
+    throw std::runtime_error("Not implemented");
+  }
 };
 
 }  // namespace gtsam