[NTG-context] Fonts not in preview of online print shop

[Jan U. Hasecke]

Dear all,

strange problem with my online print shop. I want to print 3 products.

1. Business Cards
2. Flyer
3. Poster

All definitions for fonts, colors, color profiles and pdf version come
from one an the same file (env-cd.tex).

All PDFs passed the data check without problems, but

Business Cards and Poster appear without any fonts in the final preview.

Only the Flyer looks ok.

The service staff is nice but has no idea where to look, never heard of
ConTeXt.

For the business cards the print shop will do paid manual enhancement.
The poster is not as time critical.

Any idea where to look?

juh