flexfax: facsimile job 15 to 14164460482 failed (fwd)

[Evan Leibovitch <evan@telly.org>]

>Your facsimile job to 14164460482 was not sent because document conversion
>to facsimile failed.  The output from the converter program was:
>
>Could not reopen converted document to verify format
>
>Check any PostScript documents for non-standard fonts and invalid constructs.

This appeared in return email from a Hylafax system that has otherwise run
well for months, using input that's the same ASCII stuff as ever. 

Any ideas?

- Evan