How To Fix GM012 - The activity type & is blocked

GM012 - Overview

• Message type: E = Error

• Message class: GM - Combination manager

• Message number: 012

• Message text: The activity type & is blocked

What causes this issue?

Activity type &V1& that you want to plan is blocked for planning. This
block was set in the master record of this activity type within the
period addressed.

How to fix this error?

Do not plan activity type &V1& at all, or
shorten the planning period such that activity type &V1& is open in the
new period, or
cancel the block.

Error message extract from SAP system. Copyright SAP SE.

GM012 - Details

• The SAP error message GM012, which states "The activity type & is blocked," typically occurs in the context of SAP's Controlling (CO) module, particularly when dealing with Activity-Based Costing (ABC) or when trying to post costs to a specific activity type that has been blocked for some reason.
  
  Cause:
  
  
  Blocked Activity Type: The most common cause of this error is that the activity type in question has been marked as blocked in the system. This can happen due to various reasons, such as:
  
  The activity type is not intended for use in the current period.
  The activity type has been deactivated or blocked by a user or during a configuration change.
  The activity type is not assigned to the relevant cost center or internal order.
  
  
  
  
  Configuration Issues: There may be configuration settings in the controlling area or the activity type that prevent its use.
  
  
  Authorization Issues: The user may not have the necessary authorizations to use the