no route reply from parent of a end device

route Request at p.nbr=164 but no route reply

can anyboby help me

I don't see p.nbr=164 is a route request. Can you point out correct p.nbr that is route request that doesn't get response? By the way, can you specify which Z-Stack version you use?

Z-Stack version is 2.5.1.a

Z-Stack 2..5.1a is obsolete. I would suggest you using Z-Stack Home 1.2.2.

p.nbr 167 to p.nbr 174

As I reply in previous post, Z-Stack 2..5.1a is obsolete. So, please try the new Z-Stack Home 1.2.2.

in zigbee Specification 2012 , it said

If either the device or one of its end device children is the destination of the route request command frame, it shall reply with a route reply command frame. When replying to a route request with a route reply

but i can't finde the reply
no route reply from parent of a end device some time

This is nothing to do with Zigbee spec. TI keeps improving their Z-Stack so I suggest you using latest Z-Stack.