The warning may be returned when eBay resets the category to the one that is linked to the catalo...
#category
#description
Make sure that Magento Attributes, selected in the Item Specifics, contains valid values.
Rev...
#category
#item specifics
#product attribute
The error is returned by Amazon API when some Item Specifics are missing.
You need to define...
#category
#item specifics
The error may appear if you trying to use one category for both Primary and Secondary category op...
#category
The errors may arise after eBay makes category changes. To comply with eBay catalog, please timel...
#category
Two reasons may cause this error:
1. eBay Category does not support the specified item condition....
#category
#condition
#description
#list
#synchronization