Message type: E = Error
Message class:  CNV - Conversion: Messages for Conversion Services (CNCC) 
Message number: 602
Message text: Job name and/or job count for entry invalid => funct. cannot be executed
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.
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The SAP error message CNV602 typically indicates an issue related to the job name or job count in a conversion or migration process, often associated with the SAP Landscape Transformation (SLT) or other data migration tools. This error suggests that the system is unable to execute a function due to invalid job parameters.
Cause: Invalid Job Name: The job name specified in the conversion or migration process may not exist or may be incorrectly formatted. Job Count Issues: The job count specified may be outside the acceptable range or may not correspond to any existing jobs.
Configuration Issues: There may be configuration issues in the migration tool or the system that prevent the job from being recognized. Authorization Issues: The user executing the job may not have the necessary authorizations to access or execute the specified job.
Solution: Verify Job Name: Check the job name specified in the configuration. Ensure that it is correctly spelled and exists
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