1 files changed, 1 insertions, 1 deletions
diff --git a/R/sim.R b/R/sim.R
index 1019b80..59aa49e 100644
--- a/R/sim.R
+++ b/R/sim.R
@@ -3,7 +3,7 @@ sim <- function(model,input) UseMethod("sim")
 
 #' @export
 sim.default <- function(model,input){
-  return(NULL)
+  print("The sim method is not developed for the current class of the object")
 }
 
 #' @export