hp-sendfax: certain PNG files are not added to »Select Files to Send«

[Paul Menzel]

I am not able to add certain files to the »Select Files to Send« dialog. Adding them by opening them or printing them does not work. I can only reproduce this with certain files. This PNG file is a scan with XSane. But I tried to create a blank test file, i. e. scanning with no document in there, and this files works. So I do not know what is causing this. Converting this to a JPEG with `convert` does also do *not* do the trick.

Other PNG files can be added without any problem.

The other strange thing is that printing these files to the FAX printer does also *not* work. But I guess the file is just passed on.

The following error message is shown, when I try to add the faulty file.

 ERROR:dbus.connection:Unable to set arguments ('hpfax:/net/Photosmart_2600_series?ip=10.10.10.10', 'joe', None) according to signature None: <type 'exceptions.TypeError'>: Don't know how which D-Bus type to use to encode type "NoneType"
 Traceback (most recent call last):
  File "/usr/share/hplip/ui4/sendfaxdialog.py", line 919, in CheckTimer_timeout
    self.service.CheckForWaitingFax(self.device_uri, prop.username, self.last_job_id)
  File "/usr/lib/pymodules/python2.6/dbus/proxies.py", line 140, in __call__
    **keywords)
  File "/usr/lib/pymodules/python2.6/dbus/connection.py", line 620, in call_blocking
    message.append(signature=signature, *args)
 TypeError: Don't know how which D-Bus type to use to encode type "NoneType"

I can reproduce this with `hplip-gui` `3.10.9-1` from Debian experimental and `3.10.6-1.1`.

[Gaurav Sood (gaurav-sood)]

Mr Paul can you attach the png files as an attachment here. We will see what is happening behind the scenes.

[J-K (johannes-out-of-the-forest)]

How does the filename looks like from files you are not able to fax?
Perhaps something similiar to https://bugs.launchpad.net/hplip/+bug/875211 , which is marked as a duplicate of https://bugs.launchpad.net/hplip/+bug/850346 which was fixed in hplip pacakge 3.11.12 .