Message type: E = Error
Message class:  CNV_CMIS_M_10 - Message class for Migration 
Message number: 018
Message text: Mapping values and parameters of participating systems are different
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_CMIS_M_10018 indicates that there is a mismatch in the mapping values and parameters between participating systems during a data migration or conversion process. This error typically arises in the context of SAP's Conversion and Migration tools, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
Cause: Inconsistent Data Mapping: The source and target systems may have different definitions for the same data fields. For example, if a field in the source system is defined as a string and in the target system as an integer, this can lead to mapping issues. Different Value Ranges: The value ranges for certain fields may differ between the systems. For instance, if one system allows a certain set of values for a field and the other system does not, this can cause a conflict. Missing or Incorrect Configuration: The mapping configuration may not be set up correctly, leading to discrepancies in how
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_CMIS_M_10017 Choose a hierachical object
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CMIS_M_10016 The following migration objects have been deactivated:
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_CMIS_M_10019 Source clients are different; see long text
What causes this issue?  The source client that is contained in the mapping table is &V1&. The RFC source client is &V2&.System Respon...
CNV_CMIS_M_10020 Target clients are different; see long text
What causes this issue?  The target client that is contained in the mapping table is &V1&. The RFC target client is &V2&.System Respon...
Click on this link to search all SAP messages.