Message type: E = Error
Message class:  FIPOS - Message Class for Creation of Commitment Items 
Message number: 016
Message text: No commitment item has been assigned to G/L account &1
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 FIPOS016 indicates that there is no commitment item assigned to the specified General Ledger (G/L) account. This error typically occurs in the context of public sector accounting or when working with budgetary control in SAP, where commitment items are used to track budget allocations.
Cause: Missing Commitment Item: The G/L account in question has not been assigned a commitment item in the system.
Configuration Issues: The configuration settings for the G/L account may not have been properly set up to include a commitment item. Incorrect Account Usage: The G/L account may not be intended for use in a context that requires commitment items, leading to this error when it is used inappropriately.
Solution: Assign Commitment Item: Go to the configuration settings for the G/L account in transaction code OBD4 (for G/L account master data). Check if a commitment item is assigned to the G/L account. If not, assign the appropriate commitment item that corresponds
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
FIPOS015 G/L account &1 is already blocked by another user
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FIPOS014 Company code &1 does not exist
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FIPOS017 Storage not possible due to a system error
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
FIPOS018 The default values do not agree with the specified values
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.