If you've received a 500 Server Error after pressing Link x Suggested Contracts on the Import page in the Middleware, this is because one of the links has failed.
To find the one that has failed, scroll down the Import page (click through to the next page of results if needed) until you find the first row that has a green box stating AutoLink to x Enabled under the View/Unlink field.
The linking failure is normally caused by there not being a suitable Adhoc Direct Debit contract in DDCMS for that Customer. Log into DDCMS to review the details and either create an ad-hoc contract and retry the linking, or to exclude it from being linked press the green button on the Import page where it says AutoLink to x Enabled. This should then become orange and sate Autolink to x Disabled. You can then reattempt the bulk linking.
Xero Integration: 500 server error when bulk linking suggested contracts
Error when bulk linking suggested contracts.
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Written by Ollie Denning