Odd error message

[Dale R. Worley]

I've been having some intermittent problems with Grub.  But before I can
debug that, I need to know this:

The symptom is that Grub cannot load Linux; it produces this error
message and halts:

    error: can't find command 'initrd'

Searching for this online yields a considerable number of hits, but no
explanation of what the message means, much less what might be causing
it.

As I read the message, it makes no sense at all.  'initrd' is central
feature of Grub, so you can't say that it "can't be found".

Any help would be appreciated!

Dale