I have the extension in default.xml; <extension name="fax_receive2"> <condition field="destination_number" expression="^(9979)$"> <action application="answer" /> <action application="playback" data="silence_stream://2000"/> <action application="rxfax" data="/tmp/fax-${uuid}.rxfax.tiff"/> <action application="hangup"/> </condition> </extension> then in fs_cli : originate loopback/9979 &txfax(/tmp/a.tif) in fact, the file /tmp/a.tif does exist. /tmp$ ls -l /tmp/a.tif -rwxrwxrwx 1 root root 179378 2011-02-02 05:30 /tmp/a.tif 2011-02-25 11:17:39.444902 [DEBUG] mod_spandsp_fax.c:1108 Raw write codec activation Success L16 2011-02-25 11:17:46.805168 [DEBUG] mod_spandsp_fax.c:323 ============================================================================== 2011-02-25 11:17:46.805168 [DEBUG] mod_spandsp_fax.c:335 Fax processing not successful - result (17) Received a DCN while waiting for a DIS. 2011-02-25 11:17:46.805168 [DEBUG] mod_spandsp_fax.c:340 Remote station id: 2011-02-25 11:17:46.805168 [DEBUG] mod_spandsp_fax.c:341 Local station id: SpanDSP Fax Ident 2011-02-25 11:17:46.805168 [DEBUG] mod_spandsp_fax.c:342 Pages transferred: 0 2011-02-25 11:17:46.805168 [DEBUG] mod_spandsp_fax.c:344 Total fax pages: 0 2011-02-25 11:17:46.805168 [DEBUG] mod_spandsp_fax.c:345 Image resolution: 0x0 2011-02-25 11:17:46.805168 [DEBUG] mod_spandsp_fax.c:346 Transfer Rate: 14400 2011-02-25 11:17:46.805168 [DEBUG] mod_spandsp_fax.c:348 ECM status off 2011-02-25 11:17:46.805168 [DEBUG] mod_spandsp_fax.c:349 remote country: 2011-02-25 11:17:46.805168 [DEBUG] mod_spandsp_fax.c:350 remote vendor: 2011-02-25 11:17:46.805168 [DEBUG] mod_spandsp_fax.c:351 remote model: 2011-02-25 11:17:46.805168 [DEBUG] mod_spandsp_fax.c:353 ============================================================================== 2011-02-25 11:17:46.825158 [DEBUG] mod_spandsp_fax.c:323 ============================================================================== 2011-02-25 11:17:46.825158 [DEBUG] mod_spandsp_fax.c:335 Fax processing not successful - result (41) TIFF/F file cannot be opened. 2011-02-25 11:17:46.825158 [DEBUG] mod_spandsp_fax.c:340 Remote station id: SpanDSP Fax Ident 2011-02-25 11:17:46.825158 [DEBUG] mod_spandsp_fax.c:341 Local station id: SpanDSP Fax Ident what is going wrong?? thanks