Message type: E = Error
Message class:  8I - Localization India 
Message number: 788
Message text: Invalid cost object type
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 8I788 - Invalid cost object type typically occurs when there is an issue with the cost object type being used in a transaction. This error is often related to the configuration of cost objects in the SAP system, particularly in the context of controlling (CO) and financial accounting (FI). Causes: Incorrect Cost Object Type: The cost object type specified in the transaction does not exist or is not valid in the system.
Configuration Issues: The cost object type may not be properly configured in the system, or it may not be assigned to the relevant controlling area. Master Data Issues: The master data for the cost object may be incomplete or incorrect. Transaction Type Mismatch: The transaction being executed may not support the specified cost object type. Solutions: Check Cost Object Type: Verify that the cost object type you are using is valid. You can do this by checking the configuration in the
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
8I787 Base value or Duty not entered
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
8I786 Vendor not related to material document
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
8I790 Number Group not maintained for Section &  and Recipient type &
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
8I791 Number Range not assigned for the Number Group &
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.