diff --git a/src/pybmds/__init__.py b/src/pybmds/__init__.py
index 8e514c4c..e3a7569e 100644
--- a/src/pybmds/__init__.py
+++ b/src/pybmds/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "24.1.a2"
+__version__ = "24.1a3"
 
 from .batch import BatchResponse, BatchSession  # noqa: F401
 from .constants import DistType as ContinuousDistType  # noqa: F401
diff --git a/src/pybmds/models/nested_dichotomous.py b/src/pybmds/models/nested_dichotomous.py
index 57b193be..cbe6cc7c 100644
--- a/src/pybmds/models/nested_dichotomous.py
+++ b/src/pybmds/models/nested_dichotomous.py
@@ -69,6 +69,7 @@ def to_cpp(self) -> NestedDichotomousAnalysis:
 
     def execute(self) -> NestedDichotomousResult:
         self.structs = self.to_cpp()
+        raise NotImplementedError("TODO - fix pybmds nested dichotomous binding")
         self.structs.execute()
         self.results = NestedDichotomousResult.from_model(self)
         return self.results