Error message about a table

I have a table that has been working fine, I have been adding some rows to it but the query I am using is bringing in less than 200 records. But I am getting an error message as below.

The selected data source could not be converted into an array.

I including a screen shot

Any thoughts?

Mike

Hello Mike,
I think this can help you.

Hey @mdsmith1 - I think you're likely seeing this error because the query you've written isn't actually returning any records.

Darren:
You are right. My appointment table involved doctors and some of the doctors have been removed causing the error message.
I will mark your answer as the solution.
Thank you very much.
Mike