Message type: E = Error
Message class:  CNV_MBT_46 - PCL message class 
Message number: 155
Message text: Enter program name
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_MBT_46155 with the description "Enter program name" typically occurs in the context of data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that a required program name has not been provided in the relevant field.
Cause: The error is usually caused by one of the following: Missing Input: The user did not enter a program name in the required field. Incorrect Configuration: The migration or conversion process may not be properly configured, leading to missing parameters. User Interface Issue: There may be a glitch or oversight in the user interface that prevents the program name from being recognized.
Solution: To resolve the error, you can take the following steps: Enter Program Name: Ensure that you have entered a valid program name in the required field. Check for any typos or formatting issues. Check Configuration: Review the configuration settings for the migration or conversion process to
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_MBT_46154 Enter transaction code
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_MBT_46153 Error maintaining the documentation for group &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_MBT_46156 Transaction code does not exist or transaction not attached to a program
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_MBT_46157 Program name does not exist
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.