As of December 1, 2020, Focal Point is retired and repurposed as a reference repository. We value the wealth of knowledge that's been shared here over the years. You'll continue to have access to this treasure trove of knowledge, for search purposes only. Moving forward, myibi is our community platform to learn, share, and collaborate. We have the same Focal Point forum categories in myibi, so you can continue to have all new conversations there. If you need access to myibi, contact us at firstname.lastname@example.org and provide your corporate email address, company, and name.
The MFD for the external table has to be in a very specific format. I would suggest reviewing the documentation to make sure you have all the necessary columns - for example you need a START_DATE and END_DATE.
Also, it looks like you're making quarter an A2. Try making this an A1 in both your MFD and the external file.
If you're still stuck, open up a case with Customer Support and we'll get to the bottom of this.