Message type: E = Error
Message class:  FDMO_PR_MSG - OData Process Receivables - Messages 
Message number: 020
Message text: The attachment for the promise to pay cannot be displayed
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 FDMO_PR_MSG020 indicates that there is an issue with displaying the attachment related to a "promise to pay" in the Financial Data Management (FDM) module. This error can arise due to several reasons, and here are some potential causes, solutions, and related information: Causes: Missing Attachment: The attachment may not have been uploaded correctly or may be missing from the system. Authorization Issues: The user may not have the necessary permissions to view the attachment. File Format Issues: The file format of the attachment may not be supported or may be corrupted. System Configuration: There may be issues with the configuration of the document management system or the integration with the FDM module. Technical Issues: There could be underlying technical issues, such as database problems or connectivity issues. Solutions: Check Attachment: Verify if the attachment exists in the system. If it is missing, re-upload the attachment. Review Authorizations: Ensure that the user has the appropriate authorizations
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FDMO_PR_MSG019 File type is not allowed for the upload
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FDMO_PR_MSG018 Choose a suitable extension for the file name
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FDMO_PR_MSG021 Collection segment is not available
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FDMO_PR_MSG022 The attachment for the resubmission cannot be displayed
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.