Amazon MWS update product using _POST_PRODUCT_DATA_ / Product feed - amazon-mws

Question

I want to update the ShippingWeight in some of our products.
I think the Product feed should do this for me.
The feed below seems to work fine, the data is updated in amazon, but I get an error response.
What's wrong with the feed, why do I get an error response even though the updates are done ?
I tried Update and PartialUpdate.
The error response looks like an error on creating new products.
And why do I have to specify the "Title" element when updating the ShippingWeight (Title does not have minOccurs="0" in xsd) :-(
Here's my feed:
<AmazonEnvelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="amzn-envelope.xsd">
<Header>
<DocumentVersion>1.02</DocumentVersion>
<MerchantIdentifier>xxxx</MerchantIdentifier>
</Header>
<MessageType>Product</MessageType>
<Message>
<MessageID>1375606841671</MessageID>
<OperationType>PartialUpdate</OperationType>
<Product>
<SKU>1894</SKU>
<DescriptionData>
<Title><![CDATA[abcdefghi....]]></Title>
<ItemDimensions>
<Length unitOfMeasure="CM">44.0</Length>
<Width unitOfMeasure="CM">33.0</Width>
<Height unitOfMeasure="CM">42.0</Height>
<Weight unitOfMeasure="GR">1030.0</Weight>
</ItemDimensions>
<ShippingWeight unitOfMeasure="GR">1040.0</ShippingWeight>
</DescriptionData>
</Product>
</Message>
Here's amazon's response:
<?xml version="1.0" encoding="UTF-8"?>
<AmazonEnvelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="amzn-envelope.xsd">
<Header>
<DocumentVersion>1.02</DocumentVersion>
<MerchantIdentifier>xxxxxx</MerchantIdentifier>
</Header>
<MessageType>ProcessingReport</MessageType>
<Message>
<MessageID>1</MessageID>
<ProcessingReport>
<DocumentTransactionID>yyyyy</DocumentTransactionID>
<StatusCode>Complete</StatusCode>
<ProcessingSummary>
<MessagesProcessed>1</MessagesProcessed>
<MessagesSuccessful>0</MessagesSuccessful>
<MessagesWithError>1</MessagesWithError>
<MessagesWithWarning>0</MessagesWithWarning>
</ProcessingSummary>
<Result>
<MessageID>1375606841671</MessageID>
<ResultCode>Error</ResultCode>
<ResultMessageCode>8560</ResultMessageCode>
<ResultDescription>SKU 1894, Fehlende Attribute product_type. SKU 1894 keine eindeutige ASIN gefunden. Zur Erstellung einer neuen ASIN fehlen noch folgende Attribute: product_type. Feed ID: 0. Weitere Informationen dazu http://sellercentral.amazon.de/gp/errorcode/200692370</ResultDescription>
<AdditionalInfo>
<SKU>1894</SKU>
</AdditionalInfo>
</Result>
</ProcessingReport>
</Message>
Thanx a lot in advance.

Answer 1

You have a bad SKU number. You can not send in request fiction SKU number. I found some and tried to use RO7WA11930KB1CA1A - hat.