Message type: E = Error
Message class:  CNV_10020 - Message class for package 10020 
Message number: 135
Message text: For package &1, a sample target determination object must be specified
DTFLD records you maintain for package 10020 are package-independent
and must consequently contain a sample target determination object.
DTFLD records you maintain for a package that may inherit any target
determination objects must also contain a sample target determination
object.
One of the cases described above applies to the current package &V1&.
Enter a sample target determination object.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_10020135 indicates that for a specific package (denoted as &1), a sample target determination object must be specified. This error typically arises in the context of data migration or conversion processes, particularly when using SAP's tools for data migration, such as the SAP S/4HANA Migration Cockpit or other conversion tools.
Cause: The error occurs when the system expects a target determination object to be defined for a package, but it is either missing or not properly configured. This can happen due to: Incomplete Configuration: The target determination object has not been set up in the migration project. Missing Data: The necessary data or parameters required for the target determination are not provided. Incorrect Package Setup: The package itself may not be correctly defined or may lack the necessary attributes.
Solution: To resolve this error, you can follow these steps: Check Package Configuration: Go to the relevant transaction or tool where the package is defined. Ensure that
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_10020134 Internal error: Var. &1 does not exist; value &2 should be set
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_10020133 Select exactly one row
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_10020136 For package &1, specifying a sample target determ. object is not allowed
What causes this issue?  DTFLD records you maintain for package 10020 are package-independent and must consequently contain a sample target determinat...
CNV_10020137 There are no DTLFLD records for the specified parameters
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.