SU and root FAILED

[kfcviptel]

When trying to backup an Xperia Z2 (D6503) I got this error
Waiting for USB Debugging...OK
Pushing Backup TA Tools...OK
Checking for SU binary...FAILED
Requesting root permissions...FAILED

I executed with administrator rights.

[tomchiverton]

Do you have an SU binary package installed ? Which one ?

[vwioiwv]

my sony z1(c6902) got this problem too.
i use TA v9.11 (2014-06-15)

android 5.1.1

anyone can help?

problem solved.