diff --git a/server/scanner.js b/server/scanner.js
index fe4da50..a7213dd 100644
--- a/server/scanner.js
+++ b/server/scanner.js
@@ -239,9 +239,9 @@ function convertNefToJpg(path, file) {
         error += data;
       });
 
-      ufraw.on('close', function(code) {
-        if (code != 0) {
-          return reject("UFRAW for " + path + "/" + file + " returned an error: ", error);
+      ufraw.on('exit', function(code, signal) {
+        if (signal || code != 0) {
+          return reject("UFRAW for " + path + "/" + file + " returned an error: " + code + "\n" + signal + "\n" + error + "\n");
         }
         return mkdirPromise(path + "/raw").then(function() {
           fs.rename(path + "/" + file, path + "/raw/" + file, function(err) {