diff --git a/src/sammo/DTO/Attr/Convert.php b/src/sammo/DTO/Attr/Convert.php
index ce65f149..37663a11 100644
--- a/src/sammo/DTO/Attr/Convert.php
+++ b/src/sammo/DTO/Attr/Convert.php
@@ -27,12 +27,12 @@ class Convert
     return $this;
   }
 
-  public function convertFrom(string|array|int|float|bool|null $raw): mixed
+  public function convertFrom(string|array|int|float|bool|null $raw, string $name): mixed
   {
     if($this->converter === null){
-      throw new \Exception('converter is not set');
+      throw new \Exception("converter[{$name}] is not set");
     }
-    return $this->converter->convertFrom($raw);
+    return $this->converter->convertFrom($raw, $name);
   }
 
   public function convertTo(mixed $target): string|array|int|float|bool|null {
diff --git a/src/sammo/DTO/Converter/ArrayConverter.php b/src/sammo/DTO/Converter/ArrayConverter.php
index 070d32f2..bdd0bbdd 100644
--- a/src/sammo/DTO/Converter/ArrayConverter.php
+++ b/src/sammo/DTO/Converter/ArrayConverter.php
@@ -19,15 +19,15 @@ class ArrayConverter implements Converter
     $this->itemConverter = new $itemConverterClass($itemTypes, ...$args);
   }
 
-  public function convertFrom(string|array|int|float|bool|null $raw): mixed
+  public function convertFrom(string|array|int|float|bool|null $raw, string $name): mixed
   {
     if ($raw === null && array_search('null', $this->types, true) !== false) {
       return null;
     }
     if (!is_array($raw) || !array_is_list($raw)) {
-      throw new \Exception('value is not a array');
+      throw new \Exception("value is not a array: $name");
     }
-    return array_map(fn ($v) => $this->itemConverter->convertFrom($v), $raw);
+    return array_map(fn ($v) => $this->itemConverter->convertFrom($v, $name), $raw);
   }
 
   public function convertTo(mixed $data): string|array|int|float|bool|null
diff --git a/src/sammo/DTO/Converter/Converter.php b/src/sammo/DTO/Converter/Converter.php
index 2a354bbb..d1c2682c 100644
--- a/src/sammo/DTO/Converter/Converter.php
+++ b/src/sammo/DTO/Converter/Converter.php
@@ -2,6 +2,6 @@
 namespace sammo\DTO\Converter;
 
 interface Converter{
-  public function convertFrom(string|array|int|float|bool|null $raw): mixed;
+  public function convertFrom(string|array|int|float|bool|null $raw, string $name): mixed;
   public function convertTo(mixed $data): string|array|int|float|bool|null;
 }
\ No newline at end of file
diff --git a/src/sammo/DTO/Converter/DateTimeConverter.php b/src/sammo/DTO/Converter/DateTimeConverter.php
index d3e1e2a1..665d9ca2 100644
--- a/src/sammo/DTO/Converter/DateTimeConverter.php
+++ b/src/sammo/DTO/Converter/DateTimeConverter.php
@@ -50,13 +50,13 @@ class DateTimeConverter implements Converter
     return  new \DateTimeZone($timezone);
   }
 
-  public function convertFrom(string|array|int|float|bool|null $raw): mixed
+  public function convertFrom(string|array|int|float|bool|null $raw, string $name): mixed
   {
     if ($raw === null && array_search('null', $this->types, true) !== false) {
       return null;
     }
     if (!is_string($raw)) {
-      throw new \InvalidArgumentException('DateTimeConverter can not convert non-string');
+      throw new \InvalidArgumentException("DateTimeConverter can not convert non-string: {$name}");
     }
     if (array_search('DateTimeImmutable', $this->types, true) !== false) {
       $objDateTime = new \DateTimeImmutable($raw, $this->timeZoneOffset);
diff --git a/src/sammo/DTO/Converter/DefaultConverter.php b/src/sammo/DTO/Converter/DefaultConverter.php
index 27451cdf..e869fe32 100644
--- a/src/sammo/DTO/Converter/DefaultConverter.php
+++ b/src/sammo/DTO/Converter/DefaultConverter.php
@@ -10,7 +10,7 @@ class DefaultConverter implements Converter
   {
   }
 
-  public static function convertFromItem(string $type, $raw, bool &$success): mixed
+  public static function convertFromItem(string $type, $raw, string $name, bool &$success): mixed
   {
     $success = false;
     if (is_subclass_of($type, \UnitEnum::class)) {
@@ -48,7 +48,7 @@ class DefaultConverter implements Converter
         return null;
       }
       if (!array_is_list($raw)) {
-        throw new \Exception('value is not a array');
+        throw new \Exception("value is not a array: $name");
       }
       foreach ($raw as $value) {
         if (is_int($value) || is_float($value) || is_string($value)) {
@@ -57,7 +57,7 @@ class DefaultConverter implements Converter
         if (is_bool($value) || is_null($value)) {
           continue;
         }
-        throw new \Exception('DefaultConverter can not convert array');
+        throw new \Exception("DefaultConverter can not convert array: $name");
       }
       $success = true;
       return $raw;
@@ -93,7 +93,7 @@ class DefaultConverter implements Converter
     return null;
   }
 
-  public function convertFrom(string|array|int|float|bool|null $raw): mixed
+  public function convertFrom(string|array|int|float|bool|null $raw, string $name): mixed
   {
     if ($raw === null && array_search('null', $this->types, true) !== false) {
       return null;
@@ -101,13 +101,13 @@ class DefaultConverter implements Converter
 
     foreach ($this->types as $type) {
       $success = false;
-      $value = self::convertFromItem($type, $raw, $success);
+      $value = self::convertFromItem($type, $raw, $name, $success);
       if ($success) {
         return $value;
       }
     }
 
-    throw new \Exception('DefaultConverter can not convert '.gettype($raw));
+    throw new \Exception('DefaultConverter can not convert '.gettype($raw).": $name");
   }
 
   public function convertTo(mixed $data): string|array|int|float|bool|null
diff --git a/src/sammo/DTO/Converter/MapConverter.php b/src/sammo/DTO/Converter/MapConverter.php
index 49227114..96c0f022 100644
--- a/src/sammo/DTO/Converter/MapConverter.php
+++ b/src/sammo/DTO/Converter/MapConverter.php
@@ -20,18 +20,18 @@ class MapConverter implements Converter
     $this->itemConverter = new $itemConverterClass($itemTypes, ...$args);
   }
 
-  public function convertFrom(string|array|int|float|bool|null $raw): mixed
+  public function convertFrom(string|array|int|float|bool|null $raw, string $name): mixed
   {
     if ($raw === null && array_search('null', $this->types, true) !== false) {
       return null;
     }
     if (!is_array($raw)) {
-      throw new \Exception('value is not a array');
+      throw new \Exception("value is not a array: $name");
     }
 
     $result = [];
     foreach ($raw as $key => $value) {
-      $result[$key] = $this->itemConverter->convertFrom($value);
+      $result[$key] = $this->itemConverter->convertFrom($value, $name);
     }
     return $result;
   }
diff --git a/src/sammo/DTO/DTO.php b/src/sammo/DTO/DTO.php
index 3a9542f9..62cecd04 100644
--- a/src/sammo/DTO/DTO.php
+++ b/src/sammo/DTO/DTO.php
@@ -94,7 +94,7 @@ abstract class DTO
       } else {
         $converter = new Convert(DefaultConverter::class);
       }
-      $value = $converter->setType($propTypes)->convertFrom($value);
+      $value = $converter->setType($propTypes)->convertFrom($value, $name);
 
       if($param !== null){
         $args[$name] = $value;
diff --git a/tests/DTOTest.php b/tests/DTOTest.php
index d3703d6d..4f19145e 100644
--- a/tests/DTOTest.php
+++ b/tests/DTOTest.php
@@ -85,7 +85,7 @@ class ConverterDouble implements Converter
   public function __construct(array $types, ...$args)
   {
   }
-  public function convertFrom(string|array|int|float|bool|null $raw): mixed
+  public function convertFrom(string|array|int|float|bool|null $raw, string $name): mixed
   {
     return $raw * 2;
   }