To be honest, the CSV importer was a simple prototype, and as you noticed, it’s violating the ReqIF spec by not setting the last change attribute. Sorry!
Also, you can’t edit the attribute, as it is updated automatically when you modify an item.
There are a few workarounds:
- If it’s a small number if items, then the attribute will be set when you edit them.
- You could also do a global search&replace on the raw XML
- You could simply ignore the messages. These warning won’t interfere with the operation of ReqIF Studio, and chances are low that this is a problem for any other ReqIF importer.
In the meantime, we logged this in our issue tracker.