Message type: E = Error
Message class:  IUEEDPPLOTA - Deregulation: Distribution of Aggregated Payments 
Message number: 105
Message text: Select a valid line
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 IUEEDPPLOTA105: Select a valid line typically occurs in the context of the SAP system when a user attempts to perform an action that requires a specific line item to be selected, but no valid line item is selected or the selected line item is not appropriate for the action being taken. Causes: No Line Selected: The user may not have selected any line item in a list or table where a selection is required. Invalid Line Item: The selected line item may not be valid for the operation being performed (e.g., it may be in a status that does not allow further processing). User Permissions: The user may not have the necessary permissions to select or process the line item. Data Integrity Issues: There may be issues with the data integrity in the system, such as missing or incorrect entries. Solutions: Select a Valid Line: Ensure that you have selected a valid line
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
IUEEDPPLOTA104 Select the end of the block
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
IUEEDPPLOTA103 Select the start of the block
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
IUEEDPPLOTA106 Original allocation of lot &1 to payment document &2 retained
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
IUEEDPPLOTA107 Status of distribution lot &1 does not permit closing
What causes this issue?  Distribution lot &SYST-MSGV1& has the status &SYST-MSGV2&. Distribution lots can only be closed if they have ...
Click on this link to search all SAP messages.