diff --git a/core/src/main/java/io/apigee/trireme/core/modules/Filesystem.java b/core/src/main/java/io/apigee/trireme/core/modules/Filesystem.java
index 92a3076d..50ee4bea 100644
--- a/core/src/main/java/io/apigee/trireme/core/modules/Filesystem.java
+++ b/core/src/main/java/io/apigee/trireme/core/modules/Filesystem.java
@@ -727,17 +727,18 @@ private void doMkdir(String path, int mode)
         {
             File file = translatePath(path);
             if (file.exists()) {
-                NodeOSException ne = new NodeOSException(Constants.EEXIST);
-                ne.setPath(path);
-                throw ne;
+                throw new NodeOSException(Constants.EEXIST, path);
+            }
+            if (file.getParentFile() != null && !file.getParentFile().exists()) {
+                throw new NodeOSException(Constants.ENOENT, path);
             }
             if (!file.mkdir()) {
-                throw new NodeOSException(Constants.EIO);
+                throw new NodeOSException(Constants.EIO, path);
             }
             try {
                 setMode(file, mode);
             } catch (IOException ioe) {
-                throw new NodeOSException(Constants.EIO, ioe);
+                throw new NodeOSException(Constants.EIO, ioe, path);
             }
         }