Message type: E = Error
Message class:  /SAPAPO/FOT -  
Message number: 012
Message text: Block type &1 starts
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 /SAPAPO/FOT012 Block type &1 starts typically occurs in the context of SAP Advanced Planning and Optimization (APO) when there is an issue related to the block type in the planning process. This error can arise during various planning activities, such as during the execution of a planning run or when trying to access certain planning functions.
Cause: The error message indicates that there is a problem with the block type specified in the planning process. Common causes include: Incorrect Block Type Configuration: The block type may not be properly configured in the system. Data Inconsistencies: There may be inconsistencies in the data related to the block type, such as missing or incorrect entries in the master data. Planning Area Issues: The planning area associated with the block type may not be set up correctly or may have missing characteristics. Locking Issues: The block type may be locked by another process or user,
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
/SAPAPO/FOT011 Action type &1 starts
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SAPAPO/FOT010 Execution of Data
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
/SAPAPO/FOT013 Inconsistent product for merge
What causes this issue?  In the merge process, order  &V1&  has product  &V2& which is different from main order product  &V3&...
/SAPAPO/FOT014 Not a defined FOT function (split, merge, ProdCh)
What causes this issue?  Action type  &V1& is not an FOT function. The allowed FOT functions are Split, Merge, and Product ChangeSystem Respon...
Click on this link to search all SAP messages.