[mpls-linux-general] Error: Either "to" is duplicate or "mpls" is a garbage

[lili l. <lit...@gm...>]

Hi,
I followed the HOW TO for revolving the bug related to MTU=0.
Now when i add a new NHLFE i have a correct MTU, but when i use the command
ip route add 10.0.2.1/32 via 10.0.1.1 mpls 0x2, i have this error message:
Either "to" is duplicate or "mpls" is a garbage

Please, can you help me?
Thanks