Hello! Did you try Parameters List Transformations? https://www.kamailio.org/wiki/cookbooks/devel/transformations#parameters_li… <https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kamailio.org%2Fwiki%2Fcookbooks%2Fdevel%2Ftransformations%23parameters_list_transformations&data=02%7C01%7C%7Ca702e4ab30164604fec508d7f37f9be0%7Cab4a33c2b5614f798601bc921698ad08%7C0%7C0%7C637245601731466978&sdata=ub57diRdKH%2Bv7AmwCXz82DqhyiCriw1bu5U%2FEn9OZyQ%3D&reserved=0> пт, 8 мая 2020 г. в 19:32, Luis Rojas G. &lt;luis.rojas(a)sixbell.com <mailto:luis.rojas@sixbell.com>>: Hello, I am sure that this is very easy to do, but I have been googling and I can't find a way. Having a Reason header, for instance : Reason: SIP;cause=Some_Cause;text="Some_text" How can I get the value of "Some_Cause"? I need to compare it to some specific numeric values... Thanks in advance, Luis -- Luis Rojas Software Architect Sixbell Los Leones 1200 Providencia Santiago, Chile Phone: (+56-2) 22001288 mailto:luis.rojas@sixbell.com <mailto:luis.rojas@sixbell.com> http://www.sixbell.com <https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.sixbell.com%2F&data=02%7C01%7C%7Ca702e4ab30164604fec508d7f37f9be0%7Cab4a33c2b5614f798601bc921698ad08%7C0%7C0%7C637245601731466978&sdata=6PUKqMIEB%2FK%2BkcgxsYJ7pMxifhVh5y96ymcHjYF%2F5rM%3D&reserved=0> _______________________________________________ Kamailio (SER) - Users Mailing List sr-users(a)lists.kamailio.org <mailto:sr-users@lists.kamailio.org> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users <https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Flists.kamailio.org%2Fcgi-bin%2Fmailman%2Flistinfo%2Fsr-users&data=02%7C01%7C%7Ca702e4ab30164604fec508d7f37f9be0%7Cab4a33c2b5614f798601bc921698ad08%7C0%7C0%7C637245601731476971&sdata=1c6ILaqdc1paDW6Bon83APNAwq1eJ7TatMfPPyMbDQk%3D&reserved=0> -- BR, Denys Pozniak

Try this one: $(hdr(Reason){param.value,cause})

пт, 8 мая 2020 г. в 21:57, Luis Rojas G. &lt;luis.rojas(a)sixbell.com <mailto:luis.rojas@sixbell.com>>: Hello, That is one of the parts I read, but to transform something first I would need something to transform. I don't know how to get the cause from the header. I was reading this : https://kamailio.org/docs/modules/5.3.x/modules/textopsx.html#textopsx.sel.… <https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fkamailio.org%2Fdocs%2Fmodules%2F5.3.x%2Fmodules%2Ftextopsx.html%23textopsx.sel.hf_value&data=02%7C01%7C%7C41a6de06d98740013e8b08d7f38d66cf%7Cab4a33c2b5614f798601bc921698ad08%7C0%7C0%7C637245660962672571&sdata=75sVlNzFQPs888UkJmMFevIpKsiadfLlM7ciOHq9Rp0%3D&reserved=0> It gives some nice examples, like : $b = @hf_value.p_associated_uri; $rr = @hf_value.route.uri; $prt = @hf_value2.authorization.integrity_protected; What about @hf_value.reason.cause or @hf_value2.reason.cause ? They don't even compile.  0(3848) ERROR: <core> [core/select.c:299]: resolve_select(): Unable to resolve select 'cause' at level 2  0(3848) ERROR: <core> [core/rvalue.c:2893]: fix_rval(): Unable to resolve select in cfg at line: 209 col: 42  0(3848) ERROR: <core> [core/select.c:434]: log_select(): select( 0(3848) ERROR: <core> [core/select.c:439]: log_select(): hf_value2, 0(3848) ERROR: <core> [core/select.c:439]: log_select():                       , 0(3848) ERROR: <core> [core/select.c:439]: log_select(): cause, 0(3848) ERROR: <core> [core/select.c:442]: log_select(): ) Luis On 5/8/20 2:42 PM, Denys Pozniak wrote: -- Luis Rojas Software Architect Sixbell Los Leones 1200 Providencia Santiago, Chile Phone: (+56-2) 22001288 mailto:luis.rojas@sixbell.com http://www.sixbell.com <https://nam02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.sixbell.com%2F&data=02%7C01%7C%7C41a6de06d98740013e8b08d7f38d66cf%7Cab4a33c2b5614f798601bc921698ad08%7C0%7C0%7C637245660962702553&sdata=O6eOmYSw5RnpQmGKUfnjEHJsSk7u3DPRnuogok1VH7I%3D&reserved=0> -- BR, Denys Pozniak