diff --git a/src_main/system/pisingleapplication.cpp b/src_main/system/pisingleapplication.cpp
index b64f0d8c..386edbdb 100644
--- a/src_main/system/pisingleapplication.cpp
+++ b/src_main/system/pisingleapplication.cpp
@@ -62,10 +62,12 @@ void PISingleApplication::sendMessage(const PIByteArray & m) {
 
 void PISingleApplication::begin() {
 	int cnt[2] = {0, 0};
+	int tcnt = 0;
+	shm->read(cnt, 8);
 	for (int i = 0; i < 5; ++i) {
-		cnt[1] = cnt[0];
-		shm->read(cnt, 4);
-		if (cnt[0] != cnt[1]) {
+		tcnt = cnt[0];
+		shm->read(cnt, 8);
+		if (cnt[0] == cnt[1] && cnt[0] != tcnt) {
 			first = false;
 			break;
 		}
@@ -92,7 +94,7 @@ void PISingleApplication::run() {
 			messageReceived(msg);
 			piCoutObj << "message" << msg;
 		}
-		int wi[2] = {sacnt, 0};
+		int wi[2] = {sacnt, sacnt};
 		shm->write(wi, 8);
 	}
 }