problem loading drawdf



Hi, knowledgeable Maxima people,
My system is Xubuntu12.10, amd64.  I searched all list posts from this year
and last, only one mention of drawdf in the bunch.

In Maxima 5.27 the command
load(drawdf);
is executed in both wxMaxima and XMaxima.  In 5.29 it results in the error,

loadfile: failed to load drawdf

In both 5.27 and 5.29 drawdf.mac is present in the same location:
/usr/share/maxima/5.2x/share/diffequations

I used Meld to compare the two files:  they are character per character
identical.

Am I missing something, or is this a bug?