quartus_cpf generated jic file differs from GUI generated jic file (from sof).

Tool: Quartus II 32-bit Version 12.1 Build 177 11/07/2012 SJ Full Version

I've been successfully using the "Convert Programming File" GUI dialog to convert our sof files to jic, for use with an EPCQ256 device. I then saved the Conversion Setup to a cof file, intending to drive the conversion from the Linux command line. However, the command-line generated jic file differs from that generated with the GUI just moments before:

[rrauscher-uut tmp]# ls -lrt armlite_target_AS4_*.jic

-rw-r--r--. 1 root root 33554659 Apr 11 12:37 armlite_target_AS4_GUI.jic

-rw-r--r--. 1 root root 33554659 Apr 11 12:39 armlite_target_AS4_manual.jic

[rrauscher-uut tmp]# md5sum armlite_target_AS4_*.jic

e380eed4cf2e486a4a2589c496cb7c37 armlite_target_AS4_GUI.jic

c4e5a695286f475effea02012ebc242a armlite_target_AS4_manual.jic

[rrauscher-uut tmp]#

The command-line I used is: quartus_cpf --convert ./convert_gui.cof

where convert_gui.cof is the saved Configuration Setup from the GUI. Its contents are here:

<?xml version="1.0" encoding="US-ASCII" standalone="yes"?>

<cof>

<eprom_name>EPCQ256</eprom_name>

<flash_loader_device>5SGXMA7H3</flash_loader_device>

<output_filename>/tmp/armlite_target_AS4_gui.jic</output_filename>

<n_pages>1</n_pages>

<width>1</width>

<mode>13</mode>

<sof_data>

<user_name>Page_0</user_name>

<page_flags>1</page_flags>

<bit0>

<sof_filename>/tmp/armlite_target.sof<compress_bitstream>1</compress_bitstream></sof_filename>

</bit0>

</sof_data>

<version>5</version>

<create_cvp_file>0</create_cvp_file>

<options>

<map_file>1</map_file>

</options>

</cof>

Can anyone tell me why it would be different? The miscompares start a few hundred bytes into the generated jic files.

Thanks,

--rich