FAXes are being received, but failing conversion to PDF

General Help
1

I had a call from a customer this morning - they were expecting 14 FAXes for payrolls for a chain here and only got 2 of them - looked on the box, and the missing 12 were still there as .tif files - I tried converting one on the cli and get the following:

[root@asterisk fax]# tiff2pdf -o *.pdf *.tif
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 327 (0x147) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 34910 (0x885e) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 34911 (0x885f) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 59932 (0xea1c) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 327 (0x147) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 34910 (0x885e) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 34911 (0x885f) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 59932 (0xea1c) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 327 (0x147) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 34910 (0x885e) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 34911 (0x885f) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 59932 (0xea1c) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 327 (0x147) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 34910 (0x885e) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 34911 (0x885f) encountered.
TIFFReadDirectory: Warning, 1458662441.18074.tif: unknown field with tag 59932 (0xea1c) encountered.

So am I right that Asterisk is writing a bad .tif file? Anyone else seen this? What’s even weirder, is that I could copy them to a machine and open them - they are fine - and convert them to .pdf on a PC no problem.