diff --git a/firmware/CHANGELOG.md b/firmware/CHANGELOG.md
index e9deb7aeec..8adf96a651 100644
--- a/firmware/CHANGELOG.md
+++ b/firmware/CHANGELOG.md
@@ -29,6 +29,7 @@ Release template (copy/paste this for new release):
 ### Added
  - new rusEFI console tab: Knock analyzer #6467
  - Suzuki K6A (NON VVTI Trigger) #6490
+ - explicit error if 32 bit java is used #6497
 
 ### Fixed
  - knock logic not activated until any configuration change via TS #6462
diff --git a/java_console/logging/src/main/java/com/rusefi/FileLog.java b/java_console/logging/src/main/java/com/rusefi/FileLog.java
index 3fb90f7318..99ed66cb1b 100644
--- a/java_console/logging/src/main/java/com/rusefi/FileLog.java
+++ b/java_console/logging/src/main/java/com/rusefi/FileLog.java
@@ -68,6 +68,10 @@ public enum FileLog {
         return System.getProperty("os.name");
     }
 
+    public static boolean is32bitJava() {
+        return System.getProperty("os.arch").contains("86");
+    }
+
     public static boolean isWindows() {
         return getOsName().contains("Windows");
     }
@@ -140,4 +144,4 @@ public enum FileLog {
         }
         log(e);
     }
-}
\ No newline at end of file
+}
diff --git a/java_console/shared_io/src/main/java/com/rusefi/core/rusEFIVersion.java b/java_console/shared_io/src/main/java/com/rusefi/core/rusEFIVersion.java
index 869111564e..1f283d2132 100644
--- a/java_console/shared_io/src/main/java/com/rusefi/core/rusEFIVersion.java
+++ b/java_console/shared_io/src/main/java/com/rusefi/core/rusEFIVersion.java
@@ -6,7 +6,7 @@ import java.net.URL;
 import java.util.concurrent.atomic.AtomicReference;
 
 public interface rusEFIVersion {
-    int CONSOLE_VERSION = 20240402;
+    int CONSOLE_VERSION = 20240511;
     AtomicReference<String> firmwareVersion = new AtomicReference<>("N/A");
 
     static long classBuildTimeMillis() {
diff --git a/java_console/ui/src/main/java/com/rusefi/maintenance/ProgramSelector.java b/java_console/ui/src/main/java/com/rusefi/maintenance/ProgramSelector.java
index 9cbed5f630..23a6d01869 100644
--- a/java_console/ui/src/main/java/com/rusefi/maintenance/ProgramSelector.java
+++ b/java_console/ui/src/main/java/com/rusefi/maintenance/ProgramSelector.java
@@ -136,6 +136,10 @@ public class ProgramSelector {
     }
 
     private void flashOpenBltCan(UpdateOperationCallbacks callbacks) {
+        if (FileLog.is32bitJava()) {
+            showError32bitJava();
+            return;
+        }
         OpenbltJni.OpenbltCallbacks cb = makeOpenbltCallbacks(callbacks);
 
         try {
@@ -220,7 +224,17 @@ public class ProgramSelector {
         };
     }
 
+    private void showError32bitJava() {
+        JOptionPane.showMessageDialog(content, "64 bit java required. 32 bit java not supported!",
+            "Error", JOptionPane.ERROR_MESSAGE);
+    }
+
     private void flashOpenbltSerialJni(String port, UpdateOperationCallbacks callbacks) {
+        if (FileLog.is32bitJava()) {
+            showError32bitJava();
+            return;
+        }
+
         OpenbltJni.OpenbltCallbacks cb = makeOpenbltCallbacks(callbacks);
 
         try {