diff --git a/uhd_cpp/uhd_the_ark.cpp b/uhd_cpp/uhd_the_ark.cpp
index 9902421c75b54ba06daac84c1dc634a9124abf2c..551fbecb8f49dde83b16339f8f59daf58399c687 100644
--- a/uhd_cpp/uhd_the_ark.cpp
+++ b/uhd_cpp/uhd_the_ark.cpp
@@ -17,14 +17,16 @@
 #include <uhd.h>
 
 static bool stop_signal_called = false;
+static char error_string[1024];
+static char err_msg[1024];
 #define UHD_DO(X) \
 {\
 	uhd_error e = (X);\
-	char buf_errs[1024];\
-	if (e) { snprintf(buf_errs,sizeof(buf_errs),"Error in line %d, NO %d.",__LINE__,e);\
+	if (e) { \
+	uhd_error er = uhd_get_last_error(error_string,sizeof(error_string));\
+	snprintf(err_msg,sizeof(err_msg),", line %d, Err %d.%d :",__LINE__,e,er);\
 	std::string ev = __FILE__;\
-	ev += ":";\
-	ev += buf_errs;\
+	ev += err_msg;ev += error_string;\
 	return_code = 1;\
 	throw ev;\
 	}\
@@ -49,7 +51,6 @@ const double sprate		=  200000 ;
 
 int main(int /*argc*/, char* /*argv*/[])
 {
-	char error_string[512];
 	const char dev_args[] = "";
 	//接收频率
 	double rx_freq		= 200e6;
@@ -81,6 +82,9 @@ int main(int /*argc*/, char* /*argv*/[])
 	uhd_rx_metadata_handle rx_meta = 0;
 	uhd_tx_streamer_handle tx_streamer = 0;
 	uhd_tx_metadata_handle tx_meta = 0;
+
+
+
 	try{
 		fprintf(stderr, "Creating USRP with args \"%s\"...\n", dev_args);
 		UHD_DO(uhd_usrp_make(&usrp, dev_args));