Canon has released new firmware version 1.1.1 for the CanonEOS 7D Mark II. It enhanced reliability of communications when transferring images using Wireless File Transmitter WFT-E7 (A/B/C/D/E). The new firmware corrects the phenomenon of Err70 which occurs with certain combinations of settings and phenomenon in which in very rare cases the shutter can no longer be released. The new firmware also enhances reliability of operations for specific custom function settings.
Download: Firmware version 1.1.1