Scales can be funny sometimes. I really tried to find a solution for you. I googled everything I could think of but I didn't come up with any explanation for that particular error. I am not sure of your scale model, but I did come up with some information that may be helpful to you. Apparently, after you replace the batteries, you have to follow some steps to reset the scale. I will paste the details and give you a link to where I found the info. Check the reviews on the site for more info as well. Hopefully it will be helpful to you
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the instructions (or lack thereof). As well as being written out of order (how to change the date is on page one, but how to actually install the batteries and perform an essential synchronization is a secret until page five), the procedure for entering your height, which is essential for measuring your BMI, is entirely missing!!!
I used the free customer service number (fifteen minute wait) to find out what to do. They knew exactly what I wanted, hooray, but couldn't explain why it was missing from the instructions, boo! Anyhow, to save you a phone call, the procedure to set your height is to first press the top left button, then select the user number. Then, press and hold the 'SET' button until the display flashes, when you set your height with the arrow buttons. Finally, press 'SET' again. Repeat the process for other users.
http://www.amazon.com/Oregon-Scienti...ews/B000FEA2UY