Message type: E = Error
Message class:  TBLP - Process Transfer Posting/Loan Retransfer 
Message number: 016
Message text: Release WBS element &
You want to use a WBS element for a transfer posting/loan that has not
been released.
Transfer posting/loan cannot be executed.
Release the appropriate WBS element.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message TBLP016, which states "Release WBS element &," typically occurs when there is an attempt to perform an action on a Work Breakdown Structure (WBS) element that has not been released. This can happen in various contexts, such as during project planning, budgeting, or when trying to post costs against the WBS element.
Cause: WBS Element Not Released: The primary cause of this error is that the WBS element is in a "not released" status. In SAP, WBS elements must be released before they can be used for transactions such as posting costs, creating purchase orders, or other project-related activities. Project Status: The overall project status may also affect the WBS element. If the project is not released, the WBS elements within it will also be restricted. Authorization Issues: Sometimes, the user may not have the necessary authorizations to release the WBS element.
Solution: Release the WBS Element: Navigate to the project management transaction
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
TBLP015 Create WBS element & as account assignment element
What causes this issue?  The WBS-Element has not been set up as an account assignment element, and therefore can not collect costsSystem Response  The...
TBLP014 Transfer posting no. & has been created
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
TBLP017 Error during goods movement - see error log
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
TBLP018 Error when creating/deleting reservation - see error log
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.