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[hylafax-users] Sendfax handling of multiple files



Hello all,

I've inherited a HylaFAX install and I'm hoping for a little info while I
continue to read documentation.  Please forgive me if I'm asking a FAQ or
I've overlooked what should be an easy to find answer.

We use HylaFAX for sending info to our customers about orders they place.
All data is in a TIFF file using CCIT Group 3 1D compression.  We generate
our own cover pages, rather than using that function of HylaFAX.  The covers
are PostScript.  We call sendfax from our application and give both
filenames along with phone number and various options.

My question is what happens next?  Are the files processed and sent
separately by HylaFAX or are they concatenated in some way before sending?
I read that the PostScript has to be converted to binary and that makes
sense but what about the TIFF?  My problem is that occasionally the TIFF
wasn't making it to our customers but the cover page would get there just
fine and we weren't getting an error reported back.  So I would like to
figure out whether there is any concatenation of the files which may be
failing or if I can ignore that possibility and assume the problem is with
actually sending the fax.

Hylafax 4.0pl1 binary 1.0 on Solaris 2.6(Sparc)

If anyone is curious I have stopped the problem from happening.  We were
using an old print driver from DocuJet to produce the TIFF files and when I
looked at them using tiffinfo, I would get a read error.  We switched to a
driver from PeerNet and the problems went away.  The part I couldn't get a
handle on was that we were producing about 50 of these files per day with
the read error and sending those to a few thousand recipients, but only ten
or so recipients a day would fail to get the TIFF.  Now I'm under pressure
though to figure out why the problem wasn't detected so I need to be able to
reproduce.  

Thanks in advance for any help and sorry this got so long


-Chris



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