Greetings.

Downloaded from QRZ.com website *.adi file contains many lines:

<iota:4>none
<iota:5>blank

Those lines prevent import routine to finish successfully.
Manual removing is a very tedious task.

To overcome this I use sed command:
sed -i -e '/<iota:4>none/d' -e '/<iota:5>blank/d' your-file.adi

If backup file is needed use this:
sed -i.bak -e '/<iota:4>none/d' -e '/<iota:5>blank/d' your-file.adi

Please note the following:
after switch -e and before '/ there is one space.

Best regards.
Tom - SP2L