diff --git a/EXRAIL2.cpp b/EXRAIL2.cpp
index 9b11cfc..20b205d 100644
--- a/EXRAIL2.cpp
+++ b/EXRAIL2.cpp
@@ -478,10 +478,15 @@ bool RMFT2::skipIfBlock() {
 
 
 /* static */ void RMFT2::readLocoCallback(int16_t cv) {
+  if (cv <= 0) {
+    DIAG(F("CV read error"));
+    progtrackLocoId = -1;
+    return;
+  }
   if (cv & LONG_ADDR_MARKER) {               // maker bit indicates long addr
     progtrackLocoId = cv ^ LONG_ADDR_MARKER; // remove marker bit to get real long addr
     if (progtrackLocoId <= HIGHEST_SHORT_ADDR ) {     // out of range for long addr
-      DIAG(F("Long addr %d <= %d unsupported\n"), progtrackLocoId, HIGHEST_SHORT_ADDR);
+      DIAG(F("Long addr %d <= %d unsupported"), progtrackLocoId, HIGHEST_SHORT_ADDR);
       progtrackLocoId = -1;
     }
   } else {
@@ -921,11 +926,10 @@ void RMFT2::loop2() {
       delayMe(100);
       return; // still waiting for callback
     }
-    if (progtrackLocoId<0) {
-      kill(F("No Loco Found"),progtrackLocoId);
-      return; // still waiting for callback
-    }
     
+    // At failed read will result in loco == -1
+    // which is intended so it can be checked
+    // from within EXRAIL
     loco=progtrackLocoId;
     speedo=0;
     forward=true;
diff --git a/GITHUB_SHA.h b/GITHUB_SHA.h
index 959a003..839dbb0 100644
--- a/GITHUB_SHA.h
+++ b/GITHUB_SHA.h
@@ -1 +1 @@
-#define GITHUB_SHA "devel-202408291145Z"
+#define GITHUB_SHA "devel-202409040713Z"
diff --git a/WifiESP32.cpp b/WifiESP32.cpp
index 83dd2e1..d44672a 100644
--- a/WifiESP32.cpp
+++ b/WifiESP32.cpp
@@ -265,7 +265,7 @@ bool WifiESP::setup(const char *SSid,
   if(!MDNS.begin(hostname)) {
     DIAG(F("Wifi setup failed to start mDNS"));
   }
-  if(!MDNS.addService("withrottle", "tcp", 2560)) {
+  if(!MDNS.addService("withrottle", "tcp", port)) {
     DIAG(F("Wifi setup failed to add withrottle service to mDNS"));
   }
 
diff --git a/version.h b/version.h
index cbbb391..fb87570 100644
--- a/version.h
+++ b/version.h
@@ -3,8 +3,9 @@
 
 #include "StringFormatter.h"
 
-#define VERSION "5.2.75i2c"
-// 5.2.75i2c - Add various I2C drivers, including TCA8418 and Adafruit NeoPixel Driver initially
+#define VERSION "5.2.76i2c"
+// 5.2.76i2c - Add various I2C drivers, including TCA8418 and Adafruit NeoPixel Driver initially
+// 5.2.76 - Bugfix: EXRAIL: Catch CV read errors in the callback
 // 5.2.75 - Bugfix: Serial lines 4 to 6 OK
 // 5.2.74 - Bugfix: ESP32 turn on the joined prog (as main) again after a prog operation
 // 5.2.73 - Bugfix: STM32 further fixes to shadowPORT entries in TrackManager.cpp for PORTG and PORTH