c# - Automapper fails to map two entities -

i'm trying map 2 entities - productpicturedto productpicturebdo - using automapper, exception , i'm not able understand thew mistake.

the error

missing type map configuration or unsupported mapping.

mapping types: productpicturedto -> guid erp.dto.products.productpicturedto -> system.guid

destination path: productpicturebdo

source value: erp.dto.products.productpicturedto

here below can see productpicturedto

[datacontract] public class productpicturedto {     [datamember]     public guid productpictureid { get; private set; }      [datamember]     public byte[] image { get; set; }      [datamember]     public guid productid { get; set; }      [datamember]     public virtual productdto product { get; set; } } 

here below properties of productpicturebdo

public class productpicturebdo : ientity<productpicturebdo>, ivalidation {     public const string picture_content_not_valid_error_message = "picture: content of picture not valid";     public const string associated_product_not_valid_error_message = "picture: picture not associated product";      public productpicturebdo(guid id)     {         productpictureid = id;     }      public guid productpictureid { get; private set; }      public byte[] image { get; set; }      public bool deleted { get; private set; }      #region navigation properties      public virtual productbdo product { get; set; }      public guid productid { get; set; }  } 

here below method tries map 2 entities

public ienumerable<ierror> validateproductpicture(productpicturedto picture) {     return _productsmanager.validateproductpicture(productsmapper.convert<productpicturedto, productpicturebdo>(picture)); } 

here below class responsible mapping

public static class productsmapper {     static productsmapper()     {         mapproductbdotodto();         mapproductdtotobdo();          mapproductcategorybdotodto();         mapproductcategorydtotobdo();          mapivabdotodto();         mapivadtotobdo();          mapproductsupplierbdotodto();         mapproductsupplierdtotobdo();          mapproductpicturebdotodto();         mapproductpicturedtotobdo();          mapproductnotebdotodto();         mapproductnotedtotobdo();          mapstockproductbdotodto();         mapstockproductdtotobdo();          maptagbdotodto();         maptagdtotobdo();     }       public static ttargettype convert<ttoconvert, ttargettype>(ttoconvert toconvert)     {          return mapper.map<ttargettype>(toconvert);     }       private static void mapproductdtotobdo()     {         mapper.createmap<productdto, productbdo>();     }      private static void mapproductbdotodto()     {         mapper.createmap<productdto, productbdo>().reversemap();     }      private static void mapproductcategorydtotobdo()     {         mapper.createmap<productcategorydto, productcategorybdo>();     }      private static void mapproductcategorybdotodto()     {         mapper.createmap<productcategorybdo, productcategorydto>();     }      private static void mapivadtotobdo()     {         mapper.createmap<ivadto, ivabdo>();     }      private static void mapivabdotodto()     {         mapper.createmap<ivabdo, ivadto>();     }      private static void mapproductsupplierdtotobdo()     {         mapper.createmap<productsupplierdto, productsupplierbdo>();     }      private static void mapproductsupplierbdotodto()     {         mapper.createmap<productsupplierdto, productsupplierbdo>().reversemap();     }      private static void mapproductpicturedtotobdo()     {         mapper.createmap<productpicturedto, productpicturebdo>();     }      private static void mapproductpicturebdotodto()     {         mapper.createmap<productpicturedto, productpicturebdo>().reversemap();     }      private static void mapproductnotedtotobdo()     {         mapper.createmap<productnotedto, productnotebdo>();     }      private static void mapproductnotebdotodto()     {         mapper.createmap<productnotedto, productnotebdo>().reversemap();     }      private static void mapstockproductdtotobdo()     {         mapper.createmap<stockproductdto, stockproductbdo>();     }      private static void mapstockproductbdotodto()     {         mapper.createmap<stockproductdto, stockproductbdo>().reversemap();     }      private static void maptagdtotobdo()     {         mapper.createmap<tagdto, tagbdo>();     }      private static void maptagbdotodto()     {         mapper.createmap<tagdto, tagbdo>().reversemap();     } } 

i exception in method convert of class productmapper

wild try : use mapper.dynamicmap instead of mapper.map (m risking down votes here!!)