Hrv4traning file error

Recently joined and was delighted to a data share with Hrv4training. I attempted my first data upload which failed and presented me with the following.

  • 30 minutes ago ~ Invalid hrv

I have looked at the csv file which Hrv4training uploaded and it seems in tact.

As a new user I may be making an error but can’t see what it would be.

Any advice on linking hrv4 and intervals appreciated