When a team uses the check registration option on New England swimming it fails or it says wrong file type.

If it says wrong file type:

You have to rename it with CL2 at the end instead of the sd3. So delete the sd3 and rename to CL2. It will ask if you are sure you want to change file extension; say yes.
**if you can’t see your file extensions to rename you will need to go to My Computer < tools < folder options < view < uncheck hide known file extension types and try again.

If it fails:

The reason is that our SD3 file doesn’t do relays to fit this check system. Option is to use the SDIF file instead to check or to open up the SD3 file and delete the relay and retry.

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See Also
How do I edit USA Registration Fields for one or many athletes?
USA Registration is incomplete or incorrect
USA Registration Tutorial