[Texmacs-dev] virtual font question

[skhilji]

Going thru long.vfn, I find an entry for <longrightarrow>.

In TeXmacs, I can go to math mode and then type

\longrightarrow followed by return and I do see a longrightarrow on the screen.

However the same is not true for a couple of other symbols. e.g <longmapsfrom>.

Why? I don't see any syntax error in the vfn file to hint me to believe that 
some definitions got skipped.

Using 1.0.3.6 on Linux

Salman