[Q] (bootloader) Variable not supported! target reported max download size topic

Hi, I don't know a ton about putting roms on phones but I have successfully put roms on four phones and rooted my Razr i just by following guides and hoping for the best so I'm not a complete newbie and have tried researching before posting!

Basically I have managed to root my razr i, unlock the bootloader and am trying to put CWM on the phone. I have the correct CWM file (I think) recovery-razri-tryAtouch and I plug my phone in, go to the folder of platform-tools in the android-sdk folder and run as admin a command window from there.

I check my device is there with adb devices and it is. I can do adb reboot bootloader and it goes into recovery but then when I do 'fastboot flash recovery recovery-razri-tryAtouch.img is says

(bootloader) Variable not supported!
target reported max download size of 104857600 bytes
sending 'recovery' (6926 KB)..
OKAY [ 1.002s]
writing 'recovery'...
OKAY [ 1.064s]
finished. total time: 2.068s

so it sounds like it is failing but still doing something.

Nothing seems to change basically...

I googled and found this thread http://forum.xda-developers.com/show...936512&page=30 but the suggestions confuse me and don't seem to help. I went to the thread they mention http://forum.xda-developers.com/show....php?t=2017748 and use SU to go to /system and there is no recover-from-boot file so that can't be the issue?

I also downloaded CFC_9.8.2I-50_SMI-29_S7_USASMIJBRTGB.xml from http://forum.xda-developers.com/show....php?t=2239706 but I actually don't know why or if I've already used it. I'm getting a bit confused. I want CWM to work so I can put Cyanogenmod or whichever rom is best on it.

Thanks for any help.