Message type: E = Error
Message class:  CNVA_00555_MSG - Maintaining Messages for Run Time Analysis Tool 
Message number: 045
Message text: Simulation Started at &1 on &2 :Background with Job Number &3
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 CNVA_00555_MSG045 indicates that a simulation process has started in the background, and it provides details such as the start time and job number. This message is typically informational rather than an error, meaning it is not necessarily indicative of a problem but rather a notification that a background job has been initiated.
Cause: Background Job Initiation: The message is generated when a simulation job is started in the background. This could be part of a larger process, such as data migration or system conversion. System Configuration: The system may be configured to run certain processes in the background to optimize performance or manage large data sets.
Solution: Monitor the Job: You can check the status of the background job using transaction code SM37. This will allow you to see if the job completed successfully or if there were any issues during its execution. Review Job Logs: If the job has completed, review
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNVA_00555_MSG044 Initialization has not been completed
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNVA_00555_MSG043 PCL Package Id not found
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNVA_00555_MSG046 Simulation has not been completed
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNVA_00555_MSG047 System Error
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.