Referenced font weight does not exist

Framemaker 12:- I have set up an EDD with Context paragraph formatting. When importing into my document, the Log file displays two messages:-

Referenced font weight (12pt) does not exist. Property was not imported.

Referenced font weight (14pt) does not exist. Property was not imported.

I have looked in my font directories and the font families are there (I tried Arial and Calibri). In the Framemaker size drop-down, 12pt and 14pt are displayed. In another context rule, 18pt Calibri was specified and that worked OK.

Can anyone advise me how to resolve this?

Cheers,

Graham