[pstricks] Bug in pstricks update?

[Herbert Voss]

Am 04.01.2018 um 14:20 schrieb Paul Walker:
> I have just updated MiKTeX and have found that pstricks (31-Dec-2017 
> build date) now appears to cause a problem. The error message I'm getting is
> 
> ("C:\Program Files\MiKTeX 2.9\tex\generic\pstricks\pstricks.tex"
> 
> ! Undefined control sequence.
> 
> l.31 \if at check@engine
> 
> Not sure what's happening here. If I stop pstricks from being loaded 
> things work ok - apart from the obvious that pstricks doesn't work.
> 
> Is there a known problem with the latest pstricks?

Update it again and it should work

Herbert