diff -r 024a3c6aa3f7 -r fa1c4fb0a8da master/sdo_request.h
--- a/master/sdo_request.h	Tue Jul 06 15:09:57 2010 +0200
+++ b/master/sdo_request.h	Tue Jul 06 17:40:20 2010 +0200
@@ -64,6 +64,7 @@
     unsigned long jiffies_start; /**< Jiffies, when the request was issued. */
     unsigned long jiffies_sent; /**< Jiffies, when the upload/download
                                      request was sent. */
+    int errno; /**< Error number. */
     uint32_t abort_code; /**< SDO request abort code. Zero on success. */
 };