Message type: E = Error
Message class:  FMCA_INV - PSCD Billing 
Message number: 011
Message text: Lock error in interval &1 &2 - &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 FMCA_INV011, which indicates a "Lock error in interval &1 &2 - &3," typically occurs in the context of financial management and can be related to issues with locking mechanisms in the system. This error usually arises when there is an attempt to access or modify a financial document or transaction that is currently locked by another user or process.
Cause: Concurrent Access: The most common cause of this error is that another user or process is currently accessing the same financial document or transaction, leading to a lock. Long-running Transactions: If a transaction takes too long to complete, it may hold a lock on the data, preventing others from accessing it. System Configuration: Incorrect configuration of locking mechanisms or intervals in the system can also lead to this error. Batch Jobs: Background jobs that are processing financial data may hold locks longer than expected.
Solution: Wait and Retry: If the error is due
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FMCA_INV010 No text parameter found for document &1 and additional line &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FMCA_INV009 Enter a sequence number of the additional item
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FMCA_INV012 Parallel processing object &4 for run &1 &2 &3 is not allowed
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FMCA_INV013 Contract object &1 cannot be locked for processing
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.