Provide slightly more description error on file open failure

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/docx/files.js b/lib/docx/files.js
index 0e95197..6380ea4 100644
--- a/lib/docx/files.js
+++ b/lib/docx/files.js
@@ -14,7 +14,10 @@ exports.uriToPath = uriToPath;
 function Files(base) {
     function read(uri, encoding) {
         return resolveUri(uri).then(function(path) {
-            return readFile(path, encoding);
+            return readFile(path, encoding).caught(function(error) {
+                var message = "could not open external image: '" + uri + "' (document directory: '" + base + "')\n" + error.message;
+                return promises.reject(new Error(message));
+            });
         });
     }