Hi,
there should always be 2 lines for each entry:
introscope.agent.urlgroup.keys=images,servlets,index,other,default
introscope.agent.urlgroup.group.images.pathprefix=/PlantsByWebSphere/images
introscope.agent.urlgroup.group.images.format=images
introscope.agent.urlgroup.group.servlets.pathprefix=/PlantsByWebSphere/servlet
introscope.agent.urlgroup.group.servlets.format={path_delimited:/:5:6}
introscope.agent.urlgroup.group.index.pathprefix=/PlantsByWebSphere/index.html
introscope.agent.urlgroup.group.index.format=index.html
introscope.agent.urlgroup.group.other.pathprefix=/PlantsByWebSphere/*
introscope.agent.urlgroup.group.other.format=other
introscope.agent.urlgroup.group.default.pathprefix=*
introscope.agent.urlgroup.group.default.format=Default
pathprefix defines the pattern to match against the URL, format how the metric name is formatted. It probably defaults to the full URL (including the JSESSION query parameter) if not specified.
See https://wiki.ca.com/display/APMDEVOPS97/Configure+URL+Groups
Ciao,
Guenter