> >Hallo!
> >
> > > Problem: 'ecrm2074 at 600', which exists, should be used!
> > >               'ecrm1200 at1036.8' is used  instead!
> > >
> > > How can this be corrected?
> >
> >Is this my question too silly or too difficult to answer?
> 
> depends on your settings:
> 
> (1) either you should configure tex (in texmf.cnf) to generate the
missing 
> bitmaps, or

The problem is not, that the bitmaps are not produced, but that tex doesn't
ask for the RIGHT bitmaps!

> (2) if this is a well known size, make sure that it's mentioned in a map 
> file for pdftex

How should this be done?

> also 1200*1036.8 is not 2074 so ...

1036.8 is not the magnificationfactor, it is an magnificated resolution.
So calc: 12pt * 1036.8/600 --> 20.74pt

Gruß, Wolfgang