Hi Thorsten,

I had the same problem a couple of months ago.
Use sized instead of scaled now.
The same goes for xscaled and yscaled.

Greetings Lutz

Am 4. April 2019 01:31:29 MESZ schrieb "Thorsten S." <thorsten1975@protonmail.com>:
>Hello!
>
>The simple Metapost code that follows worked fine until upgrading to
>recent beta. I don't have a clue exactly when this behaviour was
>introduced since I switched just recently from the standard Texlive
>version available in Arch Linux.
>
>\starttext
>\startMPcode
>draw externalfigure "test.pdf" scaled 10mm;
>\stopMPcode
>\stoptext
>
>Now it produces a graphic with size of approximately 110 mm at least in
>my system with various test files which previously scaled just fine..
>Any help is greatly appreciated.
>
>-Thorsten S.