calendar program

[99700000]

I've got a couple of users complaining that occasionally they get mail
from the calendar program, and all they get is an empty mail message,
not the line(s) from their calendar file.  This is on a 4.3BSD (pre-tahoe)
system - anybody else know about this one?
haynes at ucscc.ucsc.edu
haynes at ucscc.bitnet
..ucbvax!ucscc!haynes

"Any clod can have the facts, but having opinions is an Art."
        Charles McCabe, San Francisco Chronicle