[Q] [cm12][5.0.2]Probleme in updating the new nightly. topic

Hello,
Device: verizon samsung Galaxy Note 2. OS: cm12 Andoid 5.0.2
When i want to update my nighty version (OTA), my phone reboot into recovery mode.
And while it's prepraring for upadate, a message appair :
"Finding update package
E: unknow volum for path [@/cache/recovery/block.map]
E: can't mount @/cache/recovery/block.map
Installation aborted.
Rebooting..."
Any solutions ?
Thnx for help.