MAF error %s negative?

I have finaly started to figure it all out. Got the maf error % working somewhat but the numbers it if giving me are negative. is this normal? it is on the display table still figuring out how to get it into a histogram. but I think I have that figured out just have not had time to test it.

Attachment 34030

Yea, means you are rich. Copy the % error to your MAF table and multiply by %. Once you have the trims real close, multiply by % half. Withing 2% you should lock into PE mode at 0% and then be able to WB tune it for PE mode.