How To Fix /SAPAPO/CTM1321 - Input components are always consumed at the start of an activity

/SAPAPO/CTM1321 - Overview

• Message type: E = Error

• Message class: /SAPAPO/CTM1 -

• Message number: 321

• Message text: Input components are always consumed at the start of an activity

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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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/CTM1321 - Input components are always consumed at the start of an activity ?

  The SAP error message /SAPAPO/CTM1321 indicates that input components are always consumed at the start of an activity in the context of SAP Advanced Planning and Optimization (APO), specifically within the Capacity Planning and Production Planning modules. This message typically arises when there is a configuration or planning issue related to how components are consumed during production activities.
  
  Cause:
  
  Consumption Strategy: The error often occurs when the consumption strategy for the production activity is set to consume all input components at the start of the activity, which may not align with the actual production process.
  Activity Definition: The activity definition in the planning book or the production process may not be set up correctly, leading to the system interpreting that all components should be consumed at the beginning.
  Master Data Configuration: Issues with the master data, such as the bill of materials (BOM) or production resources/tools (PRT), can also lead to this error if