Ok Its the first time I have a nefmoto issue..

I connect ,slow init as usual ,try to read full read flash (with both cheap blue and rosstech cable).

About 7% read , I got an error.I tried again and again, the same.I read e2 just in case (if there was a revo demo or something) ,but its ok.

Here are the logs .I searched about reading/receiving InvalidChecksum but .still cant find anything.

Ignoring received message that is not a response. Message service ID was EcuReset
23/Ιουλ/2013 03:25:50.321: LOG: Could not construct valid message from received data: InvalidChecksum
23/Ιουλ/2013 03:25:50.322: LOG: Removing first byte from the receive buffer to try to create a valid message. Removed: 0x38
23/Ιουλ/2013 03:25:50.322: LOG: Could not construct valid message from received data: InvalidChecksum
23/Ιουλ/2013 03:25:50.323: LOG: Removing first byte from the receive buffer to try to create a valid message. Removed: 0x12
23/Ιουλ/2013 03:25:50.323: LOG: Could not construct valid message from received data: InvalidChecksum
23/Ιουλ/2013 03:25:50.324: LOG: Removing first byte from the receive buffer to try to create a valid message. Removed: 0x02
23/Ιουλ/2013 03:25:50.324: LOG: Could not construct valid message from received data: InvalidChecksum
23/Ιουλ/2013 03:25:50.325: LOG: Removing first byte from the receive buffer to try to create a valid message. Removed: 0x12
23/Ιουλ/2013 03:25:50.325: LOG: Could not construct valid message from received data: InvalidChecksum
23/Ιουλ/2013 03:25:50.326: LOG: Removing first byte from the receive buffer to try to create a valid message. Removed: 0x03
23/Ιουλ/2013 03:25:50.326: LOG: Could not construct valid message from received data: MessageContainsNoData
23/Ιουλ/2013 03:25:50.326: LOG: Removing first byte from the receive buffer to try to create a valid message. Removed: 0x00
23/Ιουλ/2013 03:25:50.327: LOG: Could not construct valid message from received data: MessageContainsNoData
23/Ιουλ/2013 03:25:50.327: LOG: Removing first byte from the receive buffer to try to create a valid message. Removed: 0x00
23/Ιουλ/2013 03:25:53.334: LOG: Double checking receive buffer for embedded messages before flushing receive buffer due to P1 ECU response inter byte time out.
23/Ιουλ/2013 03:25:53.335: LOG: Flushing 192 bytes from receive buffer due to P1 ECU response inter byte time out.
23/Ιουλ/2013 03:25:53.336: LOG: Message received no replies.
23/Ιουλ/2013 03:25:53.337: LOG: Failed to send message 3 times, message send failed.
23/Ιουλ/2013 03:25:53.338: LOG: Did not receive any replies to message.
23/Ιουλ/2013 03:25:53.339: USER: Reading ECU flash memory failed. Trying to force ECU to recognize read operation is complete.
23/Ιουλ/2013 03:25:53.341: LOG: Sent message with service ID TesterPresent
23/Ιουλ/2013 03:25:53.350: LOG: Validating flashed data checksum for address range 0x00900000 to 0x00900001.
23/Ιουλ/2013 03:25:53.376: LOG: Received message with service ID: TransferDataPositiveResponse
23/Ιουλ/2013 03:25:53.377: LOG: Ignoring message with service ID TransferDataPositiveResponse because it was unsolicited
23/Ιουλ/2013 03:25:55.345: LOG: Message received no replies.
23/Ιουλ/2013 03:25:55.346: LOG: Resending message. Send attempts: 2
23/Ιουλ/2013 03:25:55.347: LOG: Sent message with service ID TesterPresent
23/Ιουλ/2013 03:25:55.369: LOG: Received message with service ID: TesterPresentPositiveReponse
23/Ιουλ/2013 03:25:55.370: LOG: Sent message with service ID StartRoutineByLocalIdentifier
23/Ιουλ/2013 03:25:55.391: LOG: Received message with service ID: StartRoutineByLocalIdentifierPositiveResponse
23/Ιουλ/2013 03:25:55.398: LOG: Sent message with service ID RequestRoutineResultsByLocalIdentifier
23/Ιουλ/2013 03:25:55.419: LOG: Received message with service ID: NegativeResponse
23/Ιουλ/2013 03:25:55.420: LOG: Received negative response for service ID: RequestRoutineResultsByLocalIdentifier, with response code: BlockTransferDataChecksumError
23/Ιουλ/2013 03:25:55.421: LOG: Checksum is incorrect.
23/Ιουλ/2013 03:25:55.422: USER: Finished forcing ECU to recognize that failed read operation is complete.
23/Ιουλ/2013 03:25:55.453: USER: Reading ECU flash memory failed.

Well I never had issues until now..The weird thing is this car`s VIN number in e2p is all XXXXX .This is supposed to be a completely stock car.

Maybe it was a demo tune that goes back to "stock" after a period of time. I saw your other thread asking for an original. That's probably your best bet. Just boot mode flash it with an original. Maybe even replace the e2p just to make sure.

Ya you might be ok.  I assume that's the 1.8T, not the 2.0 right?  I'd just be careful because the 1.8t beetle had a smaller turbo and some other changes as compared to the GTI.  Maybe it was just a smaller downpipe (iI can't remember) but i know they had some hardware differences.