PCMTec Editions Required: Professional, One-Car Workshop, or Workshop Editions. 

To convert an existing customer to PCMTEC and avoid accidentally licensing the vehicle twice follow these steps. 

• Perform a read of the customer's vehicle and save the file (do not license it) as tuned.tec
• Return the customer's vehicle to stock using the hand controller. 
• Perform a read of the customer's vehicle and save the file (do not license it) as stock.tec
• Make note of the door tear tag, the tuned (if you didn't tune the vehicle originally, you may not be able to determine this), and stock tear tags. 

If they are all the same there is no problem. If they are different OSIDs you need to decide which one to license. 

If you decide to use the "stock.tec" you can license and flash this straight in without issue. 

If you decide to use the "tuned.tec" you need to first license the file. Then manually correct the OSID to that of its tear tag (Note. Ensure you use the correct OSID, it must match, this may be different to the "stock.tec" file and door tear tag so double check). 

You will then need to correct the strategy as well. This ensures you can datalog and you will get the "return to stock" right-click options. 

If you decide to use the door tear tag instead, follow the return to stock HOWTO guide instead. 

As the licensing system uses VIN/Serial number and OSID and you have a different OSID in the "stock.tec" and tuned.tec files it will prompt you to license both separately. In this case, ensure you decide ahead of time which OSID you wish to license. 

For the customer with Professional and Workshop Editon, the "Fix Corrupted OSID" feature will be available for them to correct the strategy. This will ask you for the correct catch code and automatically correct the OSID/Strategy for you, which will allow all compare/return-to-stock features to work correctly. This feature will require the file has been fully licensed.