diff --git a/tasmota/xdrv_01_webserver.ino b/tasmota/xdrv_01_webserver.ino
index 6b0edd8cb..8aece2be8 100644
--- a/tasmota/xdrv_01_webserver.ino
+++ b/tasmota/xdrv_01_webserver.ino
@@ -2238,7 +2238,7 @@ void HandleUploadLoop(void)
           Update.end();              // End esp8266 update session
           Web.upload_file_type = UPL_EFM8BB1;
 
-          Web.upload_error = SnfBrUpdateInit();
+          Web.upload_error = SnfBrUpdateInit();  // 10, 11
           if (Web.upload_error != 0) { return; }
         } else
 #endif  // USE_RF_FLASH
@@ -2246,7 +2246,7 @@ void HandleUploadLoop(void)
         if ((WEMOS == my_module_type) && (upload.buf[0] == ':')) {  // Check if this is a ARDUINO SLAVE hex file
           Update.end();              // End esp8266 update session
           Web.upload_file_type = UPL_TASMOTASLAVE;
-          Web.upload_error = TasmotaSlave_UpdateInit();
+          Web.upload_error = TasmotaSlave_UpdateInit();  // 0
           if (Web.upload_error != 0) { return; }
         } else
 #endif
@@ -2281,13 +2281,13 @@ void HandleUploadLoop(void)
         free(efm8bb1_update);
         efm8bb1_update = nullptr;
         if (result != 0) {
-          Web.upload_error = abs(result);  // 2 = Not enough space, 8 = File invalid
+          Web.upload_error = abs(result);  // 2 = Not enough space, 8 = File invalid, 12, 13
           return;
         }
       }
       ssize_t result = rf_search_and_write(upload.buf, upload.currentSize);
       if (result < 0) {
-        Web.upload_error = abs(result);
+        Web.upload_error = abs(result);  // 8, 12, 13
         return;
       } else if (result > 0) {
         if ((size_t)result > upload.currentSize) {