Message type: E = Error
Message class:  /ATL/CASHIR -  
Message number: 266
Message text: Document & has a blocked customer &
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 /ATL/CASHIR266 Document & has a blocked customer & typically indicates that a financial document (such as an invoice or payment) is associated with a customer account that has been blocked for transactions. This can occur in various scenarios, such as when a customer has exceeded their credit limit, has overdue payments, or has been manually blocked by a user.
Cause: Customer Blocked Status: The customer account is marked as blocked in the system, preventing any further transactions. Credit Limit Exceeded: The customer has exceeded their credit limit, which can trigger a block on new transactions. Payment Overdue: The customer may have overdue payments that have led to a block on their account. Manual Block: A user may have manually blocked the customer for various reasons, such as compliance issues or internal policies.
Solution: Check Customer Status: Go to the customer master data (transaction code XD03 for general data or FD03 for company code data). Check
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
/ATL/CASHIR265 Enter a valid invoice number
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/ATL/CASHIR264 G/L account & of the company & does not allow open items
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/ATL/CASHIR267 The amount is too larger
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/ATL/CASHIR285 The cashier balance is less than declared amount
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.