diff --git a/doc/mk_api_doc.py b/doc/mk_api_doc.py
index 64d1f17c2..c74349d3f 100644
--- a/doc/mk_api_doc.py
+++ b/doc/mk_api_doc.py
@@ -326,7 +326,7 @@ try:
     if ML_ENABLED:
         ml_output_dir = os.path.join(OUTPUT_DIRECTORY, 'html', 'ml')
         mk_dir(ml_output_dir)
-        if subprocess.call(['ocamldoc', '-html', '-d', ml_output_dir, '-sort', '-hide', 'Z3', '-I', '+zarith', '-I', '%s/api/ml' % BUILD_DIR, '%s/api/ml/z3enums.mli' % BUILD_DIR, '%s/api/ml/z3.mli' % BUILD_DIR]) != 0:
+        if subprocess.call(['ocamldoc', '-html', '-d', ml_output_dir, '-sort', '-hide', 'Z3', '-I', '$(ocamlfind query zarith)', '-I', '%s/api/ml' % BUILD_DIR, '%s/api/ml/z3enums.mli' % BUILD_DIR, '%s/api/ml/z3.mli' % BUILD_DIR]) != 0:
             print("ERROR: ocamldoc failed.")
             exit(1)
         print("Generated ML/OCaml documentation.")
diff --git a/scripts/nightly.yaml b/scripts/nightly.yaml
index 2ff044cd7..e1045bd51 100644
--- a/scripts/nightly.yaml
+++ b/scripts/nightly.yaml
@@ -56,10 +56,11 @@ stages:
     - script: |
         set -e
         cd doc
-        python mk_api_doc.py --z3py-package-path=../build/python/z3
+        python mk_api_doc.py --ml --z3py-package-path=../build/python/z3
         eval `opam config env` 
-        ocamldoc -html -d api/html/ml -sort -hide Z3 -I $( ocamlfind query zarith ) -I ../build/api/ml ../build/api/ml/z3enums.mli ../build/api/ml/z3.mli
         cd ..
+#       mkdir html/ml
+#       ocamldoc -html -d api/html/ml -sort -hide Z3 -I $( ocamlfind query zarith ) -I ../build/api/ml ../build/api/ml/z3enums.mli ../build/api/ml/z3.mli
     - script: zip -r api.zip doc/api
     - script: cp api.zip $(Build.ArtifactStagingDirectory)/.
     - task: PublishPipelineArtifact@0
diff --git a/src/sat/smt/q_ematch.cpp b/src/sat/smt/q_ematch.cpp
index b22b01cc0..18fa566c4 100644
--- a/src/sat/smt/q_ematch.cpp
+++ b/src/sat/smt/q_ematch.cpp
@@ -229,6 +229,7 @@ namespace q {
         m_mam->on_merge(root, other);
         if (m_lazy_mam)
             m_lazy_mam->on_merge(root, other);
+        m_mam->relevant_eh(other, false);
     }
 
     // watch only nodes introduced in bindings or ground arguments of functions
diff --git a/src/sat/smt/q_mam.cpp b/src/sat/smt/q_mam.cpp
index f5030648b..e821a3f99 100644
--- a/src/sat/smt/q_mam.cpp
+++ b/src/sat/smt/q_mam.cpp
@@ -3102,10 +3102,10 @@ namespace q {
         void add_candidate(code_tree * t, enode * app) {
             if (t != nullptr) {
                 TRACE("mam_candidate", tout << "adding candidate:\n" << mk_ll_pp(app->get_expr(), m););
-                if (!t->has_candidates()) {
+                if (m_to_match.empty()) 
                     ctx.push(reset_to_match(*this));
-                }
-                m_to_match.push_back(t);
+                if (!t->has_candidates()) 
+                    m_to_match.push_back(t);
                 t->add_candidate(app);
             }
         }
@@ -3783,6 +3783,7 @@ namespace q {
         void propagate() override {
             TRACE("trigger_bug", tout << "match\n"; display(tout););
             for (code_tree* t : m_to_match) {
+                std::cout << t << "\n";
                 SASSERT(t->has_candidates());
                 m_interpreter.execute(t);
                 t->reset_candidates();
@@ -3824,8 +3825,9 @@ namespace q {
         }
 
         // This method is invoked when n becomes relevant.
-        // If lazy == true, then n is not added to the list of candidate enodes for matching. That is, the method just updates the lbls.
-        void relevant_eh(enode * n, bool lazy) {
+        // If lazy == true, then n is not added to the list of 
+        // candidate enodes for matching. That is, the method just updates the lbls.
+        void relevant_eh(enode * n, bool lazy) override {
             TRACE("trigger_bug", tout << "relevant_eh:\n" << mk_ismt2_pp(n->get_expr(), m) << "\n";
                   tout << "mam: " << this << "\n";);
             TRACE("mam", tout << "relevant_eh: #" << n->get_expr_id() << "\n";);
diff --git a/src/sat/smt/q_mam.h b/src/sat/smt/q_mam.h
index 194ce7b19..42de86773 100644
--- a/src/sat/smt/q_mam.h
+++ b/src/sat/smt/q_mam.h
@@ -49,6 +49,8 @@ namespace q {
         
         virtual void add_pattern(quantifier * q, app * mp) = 0;
 
+        virtual void relevant_eh(enode * n, bool lazy) = 0;
+
         virtual void propagate() = 0;
 
         virtual bool can_propagate() const = 0;