Hi,
I was testing using Linphone SIP library and this is what their logs say:
``` 2018-07-03 16:40:59 [INFO] LinphoneCallStack.void linphone_log_handler():91 - [org.antlr.runtime.MismatchedTokenException] reason [1876:1: hexpart : ( hexseq | hexseq COLON COLON ( hexseq )? | COLON COLON ( hexseq )? );] 2018-07-03 16:40:59 [INFO] LinphoneCallStack.void linphone_log_handler():91 - [org.antlr.runtime.MismatchedTokenException] reason [1876:1: hexpart : ( hexseq | hexseq COLON COLON ( hexseq )? | COLON COLON ( hexseq )? );] 2018-07-03 16:40:59 [INFO] LinphoneCallStack.void linphone_log_handler():91 - header_record_route parser error for [Record-Route:sip:[sbc01.domain.com]:443;transport=tls;r2=on;lr=on;ftag=dBhXLGB0R;did=e36.6871] ```
Hope it helps.