This article is about a 'zero-write' which can occur when trying to write to an ECU for the first time with the Woolich Racing Tuned software (WRT) but it does not complete successfully.  The WRT software is associated with a user account, this is the account of the user who signed in previously.  If tell the WRT software to write a bin file to an ECU it will first check and see if the account has any keys (ie. license) available to perform the write action.  

The 'Model Selector' window of the WRT software shows a summary of the Bin File Definition Keys for the user account currently logged in as shown below:

Example of 'zero-write' record

This summary typically shows the total number of keys available for the model selected as well as details about when a Bin File Key was allocated and the number of times that it has been written.  Every time that a bin file is written to the ECU, the number of Writes normally increases by one.

If the very first write attempt with an ECU fails then the number of writes will show '0' (zero).  In this situation even though the write failed, a Bin File Key was allocated.  If the write was unsuccessful it is possible that the Bin File Key was not written to the ECU, which means that you have effectively lost the Bin File Key due to the 'zero write'. 

If this has happened within the first hour or two of the first 'zero-write' attempt, you should still be able to try another write attempt and WRT should let you write to the ECU. However if you try to write the ECU again and the software says you do not have any keys, please open a support ticket so that we can provide you with further information to get you up and running again.