Message type: E = Error
Message class:  CNVMBTDEL620 - Texte related to client deletion 
Message number: 006
Message text: Connection Error: &1.
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 CNVMBTDEL620006, which indicates a "Connection Error: &1," typically arises during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error suggests that there is an issue with the connection to the database or the system that is being accessed. Possible Causes: Network Issues: There may be network connectivity problems between the SAP system and the database or source system. Database Unavailability: The target database might be down or not accessible at the moment. Configuration Errors: Incorrect configuration settings in the connection parameters (e.g., hostname, port, user credentials). Firewall Restrictions: Firewalls or security settings may be blocking the connection. Resource Limitations: The system may be experiencing resource constraints (e.g., memory, CPU) that prevent it from establishing a connection. Version Compatibility: There may be compatibility issues between the SAP system and the database version. Solutions: Check Network Connectivity: Ensure that the network connection between the SAP system and the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNVMBTDEL620005 Could not update the parameter &1 for package &2 in the receiver system.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNVMBTDEL620004 Creation of parameter &1 failed in the receiver system.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNVMBTDEL620007 Insert or update parameter failed.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNVMBTDEL620008 Receiver deletion stopped. Parameter for stopping is set. See long text.
What causes this issue?  You have restarted the activity 'Start deletion of data in Receiver System' and nothing happens in the receiver sys...
Click on this link to search all SAP messages.