You send a feed and, on Seller Central in your product sheet, Amazon indicates this error;
This diagnosis is incorrect, it is not a weight error. There is an error in the feed that is not diagnosed in the Amazon back-office, the only way to know the nature of the error is to compare the Report and the XML.
Refer to these pages:
1) How to Generate XML :
2) View Report :
Send us these elements. Only these elements will allow us to understand the origin of the problem in the feed.
Do not challenge this analysis, if you do it, we would then ask you in writing for an official Amazon document stating that it is really a weight error, which you will never get, if any, neither this sentence nor this page would exist!