I remember this problem has been discussed before. Try SET CONSOLE OFF.

I found this message #01659150 which may help.

>All of a sudden am seeing Messages displaying when I execute SET REPORTBEHAVIOR 90 in Code and attempt to run a Report - Never have seen this before.
>This happens even though SET TALK is set to OFF.
>Only happens in my Windows 10 computer when compiled to an exe - no issue when running in the development environment.
>
>Here's what I see:
>.T.
>.NULL.
>GFXNORENDER
>LISTENER.VCX
>LISTENER. VCX
>LISTENER. VCX
>End of Locate scope
>.F.
>.T.
>.T.
>T.
>.NULL.