I am creating product by program calling the product service. I am adding the product to the default inventory.

Sample program

var catalog = _warehouseService.GetDefaultWarehouse().WarehouseCatalogs.FirstOrDefault();

product.AddToCatalogInventory(catalog);

_productService.Save(product);

But when retrieving

throws error

var product = _productService.GetBySku(ProductCode);

            if (product != null)
            {
              var catalog =  product.CatalogInventories.First(x => x.ProductVariantKey == product.ProductVariantKey);

}

Cant find catalog