New exception considered.

diff --git a/helm/software/matita/matitaExcPp.ml b/helm/software/matita/matitaExcPp.ml
index 35f748edab5eb54c4d7d9b2e93a0ceb685ca7d07..13eeaafeda9e937ca5c2b5fc1d6cb287a9ee2311 100644 (file)
--- a/helm/software/matita/matitaExcPp.ml
+++ b/helm/software/matita/matitaExcPp.ml
@@ -146,6 +146,8 @@ let rec to_string =
      None, "NRefiner assert failure: " ^ Lazy.force msg
   | NCicEnvironment.BadDependency msg ->
      None, "NCicEnvironment bad dependency: " ^ Lazy.force msg
+  | NCicEnvironment.BadConstraint msg ->
+     None, "NCicEnvironment bad constraint: " ^ Lazy.force msg
   | CicTypeChecker.TypeCheckerFailure msg ->
      None, "Type checking error: " ^ Lazy.force msg
   | CicTypeChecker.AssertFailure msg ->