Hi m8"!
When you get a SetIFS Failed It means it doesnt know the size of the dataspace
SetIFS is the blocksize maximum packet size that the card sends responses back to Nagra Edit, etc
The Default is fairly low, so nagraedit issues a command to increase the IFS. That way it can read or write all the data in the card ((64 bytes)) . The problem you are experiencing is due to the card not responding correctly to the command to increase the IFS. It could be due to communication errors on your serial port, power supply, or something in the card (Data Corrupted).. Try increasing the retry count in Nagra Edit ((Preferences)) and see if it can get through it..
If increasing the retry doesn't work.. lower the FIFO buffers of the COM Port as low as you can (windows setting)(last resort). If that doesn't work... try the same card on a different reader/writer or computer.
I used to get quite a few SetIFS fails but since i changed programmer i have had no problems at all
BTW: It’s my opinion that rom cards including software like Nagraedit don’t Like USB connections
But then again it's only a opinion"!!!!