I've recently been getting reports from a small number of my customers of a problem on what seems to be Win7 and Win10 that showed up recently.
I'm building on 2017r3.
My app writes formatted text to a canvas, which is displayed to the user. Before the text is displayed, the user gets an error alert:
Failure Condition: SUCCEEDED(hr)
CreateTextFormat failed: 80070057
My app subsequently closes.
Any ideas where to look and what might be happening?