What does a black triangle with an exclamation point in it mean within Message+ ?

A

AC Question

To answer a question that I saw in similar posts, no error messages, or the triangle w/ exclamation point, show up in the log of 40-50 individual texts to & from the contact. It only shows up on the screen showing the last text to each contact.

To answer a question I saw in similar posts, I didn't block or hide my number.

I want to know whether there was an technical error in the text being delivered, or maybe whether the text was blocked.

I know of no reason why it should be blocked. But if it were, I would just like to know that and will not call or text if that is what the contact wants.