This is most likely a mismatch between the CDCT and the directory containing the condense files. This can happen if you manually delete condense files outside of the control of the condense process. Verify that the file specified in the error message actually exists. If the file exists, see the prior message that describes the file open error and fix the problem. If the file does not exist, try restarting the Condense process. If, after the Condense process is fully restarted, the problem still exists, consider attempting to restore the file, the CDCT, and/or the CCT. If the problem still exists, contact Informatica Global Customer Support.