Upgrades from GC4-X4 and older will fail. To update a "jig" must be used. 

To upgrade to G00-Y8 or later:
1. Install the GXX-A2 jig. Use "GXX-A2-<model number>.tar" for the file name. Example: "GXX-A2-c308.tar".
2. Install the latest release. Use "latest-<model number>.tar" for the file name. Example: "latest-c308.tar". 

Notes from Konica bulletin 14161:
- It is recommended to leave at least one hour between the start times of the GXX-A2 Jig and G00-Y8 or later.
- The machine can be used with the JIG FW, but it is not recommended for long-term use.