How To Fix /SAPAPO/FOT402 - Action type &1 is not defined; use S, M or P

/SAPAPO/FOT402 - Overview

• Message type: E = Error

• Message class: /SAPAPO/FOT -

• Message number: 402

• Message text: Action type &1 is not defined; use S, M or P

Self-Explanatory Message

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.

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/SAPAPO/FOT402 - Details

• The SAP error message /SAPAPO/FOT402 Action type &1 is not defined; use S, M or P typically occurs in the context of SAP Advanced Planning and Optimization (APO) when a user attempts to execute a function that requires a specific action type, but the provided action type is not recognized by the system.
  
  Cause:
  The error is caused by the use of an invalid action type in a function or transaction within SAP APO. The valid action types are:
  
  S: for "Simulation"
  M: for "Mass Processing"
  P: for "Planning"
  
  If an action type other than these is specified, or if the action type is not defined in the system, this error will be triggered.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the Action Type: Ensure that you are using one of the valid action types (S, M, or P). If you are using a different action type, change it to one of the valid