Can't Burn to EEPROM

[Skyline8075]

Any ideas on why I can't burn eeprom to ecu? If I download ecu map change one thing save and try to burn it says

"nistune has detected a potential data sync mismatch resync your nistune board or emulator. burn to board terminated"

I can connect to computer with car on or off & see live data.
I can download maps from ecu.
Yes correct vehicle is selected upon initial open of program.

Vehicle selected is S14A Silvia SR20det 80FXX 82FXX
When map is downloaded from car it says 23710-80F00

Why am I getting this error when trying to burn, but everything else seems ok???

[Skyline8075]

I apologize figured it out.

I had the wrong version number of the vehicle selected.

First I had one of the feature packs selected and then I had s14a sr20det not s14a2 sr20det.

This was all from opening a file I downloaded which was a different version than mine and the program auto changed it on me.

[Matt]

Make sure you also have all the ROM packs installed, in case it is missing files

From default Nistune will use 80F00 (factory S14) but if feature pack its detected (80F0F/80F0G) then it will ask if you want to load the feature pack version of the address file

This is in Documents/Nistune/Address/FeaturePack1 folder