Property Replacer plus ("+") sign

[claudiu-edi]

Hello!

I am trying to use the following template:

template(name="extract" type="string" string="%msg:F,9+:3%")

I want to use this to extract the 3rd field from a message with fields delimited by an unknown number of tab characters. However I always get this when testing the config:

rsyslogd: version 8.1908.0, config validation run (level 1), master config /etc/rsyslog.conf
rsyslogd: error during parsing file /etc/rsyslog.d/fieldtesting.conf, on or before line 9: error: invalid character '+' in frompos after "F,", property: 'msg:F,9+:3%' be sure to use DECIMAL character codes! [v8.1908.0 try https://www.rsyslog.com/e/2207 ]
rsyslogd: error during parsing file /etc/rsyslog.d/fieldtesting.conf, on or before line 9: error processing template object [v8.1908.0 try https://www.rsyslog.com/e/2207 ]
rsyslogd: error during parsing file /etc/rsyslog.d/fieldtesting.conf, on or before line 11: exec_template(): template 'extract' could not be found [v8.1908.0 try https://www.rsyslog.com/e/2207 ]

What am I doing wrong? Thanks!