Message type: E = Error
Message class:  CNV_20100 - Messageclass for chart of account conversion 
Message number: 318
Message text: No G/L accounts or cost elements in CoA &1 are modified
The program found that no G/L accounts / cost elements are contained in
the mapping &V1& --> &V2&
This means the conversion scenario will be a pure Chart of accounts
rename or -copy.
Check your mapping for correctness.
In case you indeed want to change the Chart of accounts name only, then
you can ignore this message
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_20100318 indicates that there are no General Ledger (G/L) accounts or cost elements that have been modified in the specified Chart of Accounts (CoA). This error typically arises during data migration or conversion processes, particularly when using SAP's Migration Cockpit or other data transfer tools.
Cause: No Modifications: The primary cause of this error is that the system did not find any G/L accounts or cost elements that have been changed or modified in the specified Chart of Accounts. Incorrect Configuration: There may be an issue with the configuration of the Chart of Accounts or the mapping of accounts during the migration process. Data Selection Criteria: The selection criteria used to identify modified accounts may not be correctly set, leading to no results being returned. Data Migration Process: If the data migration process is not correctly set up or if the source data does not contain any modified accounts, this error
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_20100317 Copy of chart of accounts
What causes this issue?  <ZK>Copy Rows</> indicator is set for chart-of-accounts &V1&.System Response  The system issues an error ...
CNV_20100316 __Assignment of G/L accts and cost elements in CoA &1 is CoCd-dependent
What causes this issue?  The assignment of G/L accounts and cost elements in chart of accounts &V1& is company code-dependent. This means that...
CNV_20100319 Cyclic changes and/or temporary duplicates
What causes this issue?  <DS:TX.CNV_MBT_CYCLIC_CHANGE>Cyclic changes</> and/or <DS:TX.CNV_MBT_TEMP_DUPLICATES>temporary duplicates&l...
CNV_20100320 KEYCHVIEWS indicator is initialized due to blending with other packages
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.