diff --git a/app/build.gradle b/app/build.gradle
index 5405da7..c195b8c 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -11,7 +11,7 @@ android {
         minSdk minApi
         targetSdk targetApi
         versionCode 21
-        versionName "v2.9.5-3dfx-profiterole"
+        versionName "v2.9.5-3dfx-quincejelly"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         multiDexEnabled true
     }
diff --git a/app/src/main/java/com/vectras/vm/MainActivity.java b/app/src/main/java/com/vectras/vm/MainActivity.java
index 3a01e52..c0ecc0a 100644
--- a/app/src/main/java/com/vectras/vm/MainActivity.java
+++ b/app/src/main/java/com/vectras/vm/MainActivity.java
@@ -990,8 +990,8 @@ public class MainActivity extends AppCompatActivity {
         File romDir = new File(Config.getCacheDir()+ "/" + Config.vmID);
         romDir.mkdirs();
 
-        if (!VMManager.isthiscommandsafe(env)) {
-            VectrasApp.oneDialog(activity.getResources().getString(R.string.problem_has_been_detected), activity.getResources().getString(R.string.harmful_command_was_detected), true, false, activity);
+        if (!VMManager.isthiscommandsafe(env, activity.getApplicationContext())) {
+            VectrasApp.oneDialog(activity.getResources().getString(R.string.problem_has_been_detected), activity.getResources().getString(R.string.harmful_command_was_detected) + " " + activity.getResources().getString(R.string.reason) + ": " + VMManager.latestUnsafeCommandReason, true, false, activity);
             return;
         }
 
@@ -1197,22 +1197,23 @@ public class MainActivity extends AppCompatActivity {
         doneonstart = true;
 
         if (!AppConfig.pendingCommand.isEmpty()) {
-            if (!VMManager.isthiscommandsafe(AppConfig.pendingCommand)) {
+            if (!VMManager.isthiscommandsafe(AppConfig.pendingCommand, getApplicationContext())) {
                 AppConfig.pendingCommand = "";
-                VectrasApp.oneDialog(activity.getResources().getString(R.string.problem_has_been_detected), activity.getResources().getString(R.string.harmful_command_was_detected), true, false, activity);
-                return;
-            }
-            if (AppConfig.pendingCommand.startsWith("qemu-img")) {
-                if (!VMManager.isthiscommandsafeimg(AppConfig.pendingCommand)) {
-                    return;
-                }
-                Terminal _vterm = new Terminal(MainActivity.this);
-                _vterm.executeShellCommand2(AppConfig.pendingCommand, false, MainActivity.activity);
-                Toast.makeText(getApplicationContext(), getResources().getString(R.string.done), Toast.LENGTH_LONG).show();
+                VectrasApp.oneDialog(activity.getResources().getString(R.string.problem_has_been_detected), activity.getResources().getString(R.string.harmful_command_was_detected) + " " + activity.getResources().getString(R.string.reason) + ": " + VMManager.latestUnsafeCommandReason, true, false, activity);
             } else {
-                StartVM.cdrompath = "";
-                String env = StartVM.env(MainActivity.activity, AppConfig.pendingCommand, "", "1");
-                MainActivity.startVM("Quick run", env, AppConfig.pendingCommand, "");
+                if (AppConfig.pendingCommand.startsWith("qemu-img")) {
+                    if (!VMManager.isthiscommandsafeimg(AppConfig.pendingCommand, getApplicationContext())) {
+                        VectrasApp.oneDialog(activity.getResources().getString(R.string.problem_has_been_detected), activity.getResources().getString(R.string.size_too_large_try_qcow2_format), true, false, activity);
+                    } else {
+                        Terminal _vterm = new Terminal(MainActivity.this);
+                        _vterm.executeShellCommand2(AppConfig.pendingCommand, false, MainActivity.activity);
+                        Toast.makeText(getApplicationContext(), getResources().getString(R.string.done), Toast.LENGTH_LONG).show();
+                    }
+                } else {
+                    StartVM.cdrompath = "";
+                    String env = StartVM.env(MainActivity.activity, AppConfig.pendingCommand, "", "1");
+                    MainActivity.startVM("Quick run", env, AppConfig.pendingCommand, "");
+                }
             }
             AppConfig.pendingCommand = "";
         }
diff --git a/app/src/main/java/com/vectras/vm/VMManager.java b/app/src/main/java/com/vectras/vm/VMManager.java
index a475286..5515eba 100644
--- a/app/src/main/java/com/vectras/vm/VMManager.java
+++ b/app/src/main/java/com/vectras/vm/VMManager.java
@@ -45,6 +45,8 @@ public class VMManager {
     public static int restoredVMs = 0;
     public static boolean isKeptSomeFiles = false;
 
+    public static String latestUnsafeCommandReason = "";
+
     public static void createNewVM(String name, String thumbnail, String drive, String arch, String cdrom, String params, String vmID, int port) {
         mapForCreateNewVM.clear();
         mapForCreateNewVM.put("imgName", name);
@@ -717,35 +719,61 @@ public class VMManager {
         movetoRecycleBin();
     }
 
-    public static boolean isthiscommandsafe(String _command) {
+    public static boolean isthiscommandsafe(String _command, Context _context) {
         if (_command.startsWith("qemu")) {
             if (!_command.contains("&")) {
                 if (!_command.contains("\n")) {
                     if (!_command.contains(";")) {
                         if (!_command.contains("|")) {
                             return true;
+                        } else {
+                            latestUnsafeCommandReason = _context.getString(R.string.command_are_not_allowed_to_contain_vertical_bars);
                         }
+                    } else {
+                        latestUnsafeCommandReason = _context.getString(R.string.command_are_not_allowed_to_contain_semicolons);
                     }
+                } else {
+                    latestUnsafeCommandReason = _context.getString(R.string.command_are_not_allowed_to_contain_multiple_lines);
                 }
+            } else {
+                latestUnsafeCommandReason = _context.getString(R.string.command_are_not_allowed_to_contain_amp);
             }
+        } else {
+            latestUnsafeCommandReason = _context.getString(R.string.not_the_command_to_run_qemu);
         }
         return false;
     }
 
-    public static boolean isthiscommandsafeimg(String _command) {
+    public static boolean isthiscommandsafeimg(String _command, Context _context) {
         if (!_command.contains("qcow2")) {
             String _getsize = _command.substring(_command.lastIndexOf(" ") + 1);
             if (_getsize.toLowerCase().endsWith("t") || _getsize.toLowerCase().endsWith("p")  || _getsize.toLowerCase().endsWith("e")) {
+                latestUnsafeCommandReason = _context.getString(R.string.size_too_large_try_qcow2_format);
                 return false;
             }
             if (_getsize.toLowerCase().endsWith("g")) {
-                return _getsize.length() <= 2;
+                if (_getsize.length() <= 2) {
+                    return true;
+                } else {
+                    latestUnsafeCommandReason = _context.getString(R.string.size_too_large_try_qcow2_format);
+                    return false;
+                }
             }
             if (_getsize.toLowerCase().endsWith("m")) {
-                return _getsize.length() <= 4;
+                if (_getsize.length() <= 4) {
+                    return true;
+                } else {
+                    latestUnsafeCommandReason = _context.getString(R.string.size_too_large_try_qcow2_format);
+                    return false;
+                }
             }
             if (_getsize.toLowerCase().endsWith("k")) {
-                return _getsize.length() <= 8;
+                if (_getsize.length() <= 8) {
+                    return true;
+                } else {
+                    latestUnsafeCommandReason = _context.getString(R.string.size_too_large_try_qcow2_format);
+                    return false;
+                }
             }
         }
         return true;
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 5961a5c..1d9c16a 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -3,7 +3,7 @@
     <string name="app_name">Vectras VM</string>
 
     <!--======================VECTRAS STRINGS====================-->
-    <string name="app_version" translatable="false">v2.9.5 (3dfx - Profiterole)</string>
+    <string name="app_version" translatable="false">v2.9.5 (3dfx - Quince Jelly)</string>
     <string name="qemu_version" translatable="false">Stable</string>
     <string name="str_home">Home</string>
     <string name="str_logger">Logger</string>
@@ -419,6 +419,13 @@
     <string name="you_need_to_complete_vectras_vm_setup_before_importing_this_file">You need to complete Vectras VM setup before importing this file.</string>
     <string name="unable_to_create_the_directory_to_create_the_vm">Unable to create directory to create virtual machine, this may be because you have not granted permission, there is not enough free space of internal storage or other.</string>
     <string name="with">With</string>
+    <string name="not_the_command_to_run_qemu">Not the command to run Qemu.</string>
+    <string name="command_are_not_allowed_to_contain_amp">Commands are not allowed to contain \"&amp;\".</string>
+    <string name="command_are_not_allowed_to_contain_multiple_lines">Commands are not allowed to contain multiple lines.</string>
+    <string name="command_are_not_allowed_to_contain_semicolons">Commands are not allowed to contain \";\".</string>
+    <string name="command_are_not_allowed_to_contain_vertical_bars">Commands are not allowed to contain \"|\".</string>
+    <string name="reason">Reason</string>
+    <string name="size_too_large_try_qcow2_format">Size too large, try qcow2 format.</string>
 
     <!--======================TERMUX STRINGS====================-->
     <string name="application_name" translatable="false">Vterm</string>
diff --git a/web/data/UpdateConfig.json b/web/data/UpdateConfig.json
index e5a2a05..e476333 100644
--- a/web/data/UpdateConfig.json
+++ b/web/data/UpdateConfig.json
@@ -1,15 +1,15 @@
 {
     "versionCode":"21",
-    "versionName":"v2.9.5-3dfx,v2.9.5-3dfx-almondcake,v2.9.5-3dfx-bread,v2.9.5-3dfx-churro,v2.9.5-3dfx-doughnut,v2.9.5-3dfx-empanada,v2.9.5-3dfx-flan,v2.9.5-3dfx-gugelhupf,v2.9.5-3dfx-hamentaschen,v2.9.5-3dfx-italianice,v2.9.5-3dfx-ladyfingers,v2.9.5-3dfx-madeleine,v2.9.5-3dfx-neapolitanicecream,v2.9.5-3dfx-orangecake,v2.9.5-3dfx-profiterole",
+    "versionName":"v2.9.5-3dfx,v2.9.5-3dfx-almondcake,v2.9.5-3dfx-bread,v2.9.5-3dfx-churro,v2.9.5-3dfx-doughnut,v2.9.5-3dfx-empanada,v2.9.5-3dfx-flan,v2.9.5-3dfx-gugelhupf,v2.9.5-3dfx-hamentaschen,v2.9.5-3dfx-italianice,v2.9.5-3dfx-ladyfingers,v2.9.5-3dfx-madeleine,v2.9.5-3dfx-neapolitanicecream,v2.9.5-3dfx-orangecake,v2.9.5-3dfx-profiterole,v2.9.5-3dfx-quincejelly",
     "size": "46 MB",
     "url": "https://github.com/xoureldeen/Vectras-VM-Android/releases/v2.9.5",
     "Message": "<h2>v2.9.5-3dfx</h2><ul><li>Bring back 3dfx support.</li><li>Enhance app execution.</li><li>Added some linux programs in x11 display.</li><li>Added alpine linux (x11).</li><li>Russian language by <a href=\"https://github.com/OFGING\" target=\"_blank\">@OFGING</a></li></ul><br><br>New updates are live!",
     "cancellable": true,
     "versionCodeBeta":"21",
-    "versionNameBeta":"v2.9.5-3dfx-profiterole",
-    "versionNameBetas":"v2.9.5-3dfx-madeleine,v2.9.5-3dfx-neapolitanicecream,v2.9.5-3dfx-orangecake,v2.9.5-3dfx-profiterole",
+    "versionNameBeta":"v2.9.5-3dfx-quincejelly",
+    "versionNameBetas":"v2.9.5-3dfx-madeleine,v2.9.5-3dfx-neapolitanicecream,v2.9.5-3dfx-orangecake,v2.9.5-3dfx-profiterole,v2.9.5-3dfx-quincejelly",
     "sizeBeta": "48 MB",
     "urlBeta": "https://github.com/AnBui2004/Vectras-VM-Emu-Android/releases",
-    "MessageBeta": "<h2>Profiterole</h2>Bugs fixed.",
+    "MessageBeta": "<h2>Quince Jelly</h2>Bugs fixed.",
     "cancellableBeta": true
 }