The bank servers use Quicken to download transactions sometimes, then there occurs a quicken error code cc 502. It can be caused due to many reasons such as, by maintenance on the bank servers, problems in the internet connection or the server issues. You can visit the guide Fixradar to resolve all the errors of Quickbooks.
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How to Resolve Quicken Error Cc-502?
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How to Resolve Quicken Error Cc-502?

Quicken Error cc-502 is due to bank server maintenance used for transaction download. Troubleshoot by refreshing banking details.