Message type: E = Error
Message class:  CNV_CDMC_CC - CDMC - Messages for the Control Center 
Message number: 068
Message text: Start date is greater than the current date
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message CNV_CDMC_CC068 indicates that there is an issue with a date being set in the system. Specifically, the error states that the "Start date is greater than the current date." This typically occurs in the context of data migration or conversion processes, particularly when using the SAP Conversion Tools.
Cause: The error arises when a date that is intended to be used as a start date for a process (such as a migration or conversion) is set to a future date, which is not allowed. The system expects the start date to be either the current date or a past date.
Solution: To resolve this error, you should take the following steps: Check the Date Input: Review the date that has been entered in the relevant field. Ensure that it is not set to a future date. The date should be today or any date in the past. Adjust the Date: If the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_CDMC_CC067 Start date is greater than the End date
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CDMC_CC066 Server list is not available for the system &
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CDMC_CC069 Obtaining TBOM details are skipped due to long runtime for result id &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CDMC_CC070 Aborted as the job of the triggering activity is aborted or cancelled
What causes this issue?  This activity is aborted as the job of that activity which has triggered 'Determine Customer Objects' internally is...
Click on this link to search all SAP messages.