JB seems to mount sdcard as /storage/sdcard0. So whenever I'm trying to flash through goomanager, goomanager uses that location, but TWRP is still using /storage/sdcard, which causes TWRP unable to find the zip. But sdcard is still able to mount in TWRP and I'm still able to flash from TWRP.
Below is the log:
-- Install /storage/sdcard0/goomanager/rom.zip
Finding update package...
E: unknown volume for path [/storage/sdcard0/goomanager/rom.zip]
E: Can't mount /storage/sdcard0/goomanager/rom.zip
* Verifying filesystem...
* Verifying partition sizes...
E: Error instaling zip file '/storage/sdcard0/goomanager/rom.zip'
Done processing script file