OpenCDISC genenrating incorrect error

I recently ran OpenCDISC validator on XPT datasets from one of the study I am working on.

The validator ran fine. When I tried to open the report, I got this message 'Excel found un-readable

content in the OpenCDISC report. Do you want to recoved the contents?...,click Yes '. When I clicked

Yes, Excel was able to recover the file. When I looked into this report, there were error messages

which we not true and not applicable to the data. For ex - One of the error message says 'NULL value

in DOMAIN variable marked as required'. This was DS domain. Error code- OpenCDISC ID - 'SD002'.

The actual DS looks fine however. There are no NULL values. There are many other errors like that.