diff --git a/DESCRIPTION b/DESCRIPTION
index 800e09f9..599b2a98 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,8 +1,8 @@
 Package: PKPDsim
 Type: Package
 Title: Simulate ODE models
-Version: 1.0.15
-Date: 2019-02-19
+Version: 1.0.16
+Date: 2019-02-25
 Author: Ron Keizer
 Maintainer: Ron Keizer <ronkeizer@gmail.com>
 Depends: R (>= 3.0.2)
diff --git a/R/model_from_api.R b/R/model_from_api.R
index 584fc7a4..d51e3586 100644
--- a/R/model_from_api.R
+++ b/R/model_from_api.R
@@ -82,7 +82,9 @@ model_from_api <- function(model = NULL,
         writeLines(test_txt, fileConn)
         close(fileConn)
       } else {
-        stop("Test file not found!")
+        if(def$build || force) {
+          stop(paste0("Test file (", test_file,") not found!"))
+        }
       }
     }
     validation <- NULL