diff --git a/cmd/qdiimpl.go b/cmd/qdiimpl.go
index 83ab1ca..4cdc23c 100644
--- a/cmd/qdiimpl.go
+++ b/cmd/qdiimpl.go
@@ -491,7 +491,7 @@ func gen(outputName string, obj types.Object, iface *types.Interface) error {
 			bgroup.Id("msg").Op(":=").Lit("not implemented")
 			bgroup.If(Id("hasCallbacks")).
 				Block(
-					bgroup.Id("msg").Op("=").Lit("not supported by any callbacks"),
+					Id("msg").Op("=").Lit("not supported by any callbacks"),
 				)
 			bgroup.Return(Qual("fmt", "Errorf").
 				Call(Lit(fmt.Sprintf("[%s] method '%%s' %%s", objName)),
diff --git a/sample/complex/myinterface_qdii.go b/sample/complex/myinterface_qdii.go
index f8d4039..6625c52 100644
--- a/sample/complex/myinterface_qdii.go
+++ b/sample/complex/myinterface_qdii.go
@@ -263,7 +263,6 @@ func (d *qdMyInterface[T, X]) methodNotImplemented(qdCtx *QDMyInterfaceContext,
 	if hasCallbacks {
 		msg = "not supported by any callbacks"
 	}
-	msg = "not supported by any callbacks"
 	return fmt.Errorf("[qdMyInterface] method '%s' %s", qdCtx.MethodName, msg)
 }
 
diff --git a/sample/datatype/sampledata_qdii.go b/sample/datatype/sampledata_qdii.go
index 8e3b1d8..5339794 100644
--- a/sample/datatype/sampledata_qdii.go
+++ b/sample/datatype/sampledata_qdii.go
@@ -101,7 +101,6 @@ func (d *QDSampleData) methodNotImplemented(qdCtx *QDSampleDataContext, hasCallb
 	if hasCallbacks {
 		msg = "not supported by any callbacks"
 	}
-	msg = "not supported by any callbacks"
 	return fmt.Errorf("[QDSampleData] method '%s' %s", qdCtx.MethodName, msg)
 }
 
diff --git a/sample/package/reader_qdii.go b/sample/package/reader_qdii.go
index 1b4f94d..138b1b7 100644
--- a/sample/package/reader_qdii.go
+++ b/sample/package/reader_qdii.go
@@ -97,7 +97,6 @@ func (d *Reader) methodNotImplemented(qdCtx *ReaderContext, hasCallbacks bool) e
 	if hasCallbacks {
 		msg = "not supported by any callbacks"
 	}
-	msg = "not supported by any callbacks"
 	return fmt.Errorf("[Reader] method '%s' %s", qdCtx.MethodName, msg)
 }