My Nuvi1350 does not have the functionality "Tools, My Data, Route Planner".
Windows Explorer a 'current.gpx' (4KB file) and a 'temp.gpx' (87KB) file with 1,555 rows of data. Row 315 and 316 identify the Route. Below is a copy of the code:
<rte>
<name>Route Home to Work Pay Road</name>...