https://community.appian.com/discussions/f/general/18602/the-cdt-mapping-suddently-can-not-pass-verfication-can-someone-help-meoneday, we accentely delete all CDTs in our project, so we decide recrate CDT from Oracle DB view. Then we receive the errors: The data source schema does not match the type mappings: Wrong column type in APPIAN.IC_V_EXPIRYDATEBLANK for column MSTIDen-USTelligent Community 12https://community.appian.com/thread/73226?ContentTypeID=1Fri, 10 Apr 2020 16:01:26 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:f9dc858d-2cdd-47d4-af17-8790b8a89e03davel001150<p>I think you will have to touch the XSD files and update them yourself.&nbsp; Expiry date, for instance, according to your schema is looking for a TIMESTAMP.&nbsp; It looks as though Appian is trying to pass a NUMBER to it.&nbsp; I think a hiccup in the XSD generation process occurred, and you&#39;ll need to update XSD manually to correctly pass TIMESTAMP to that, which would map with Appian&#39;s DateTime datatype.</p> <p>DateTimes in Appian are actually stored as miliseconds since epoch, which is standard for most operating systems.&nbsp; Appian&#39;s epoch is Jan 1, 2035, so it&#39;s a negative integer.&nbsp; It can also be represented as decimal days since epoch.&nbsp; Either way, if there was a problem in the type conversion, it makes sense how it could expect NUMBER instead of TIMESTAMP.</p><div style="clear:both;"></div>