How To Fix UCS0123 - No resources available for task &1; see long text

SAP Error Message - Details

• Message type: E = Error

• Message class: UCS0 - Messages for Status Management

• Message number: 123

• Message text: No resources available for task &1; see long text

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

INCLUDE UCS0_SPTA_ERROR_CAUSE OBJECT DOKU ID TX
Message <DS:NA.BT837>BT 837</> or previous message &V4&
Error text: &V2&&v3&

System Response

INCLUDE UCS0_SPTA_ERROR_RESPONSE OBJECT DOKU ID TX

How to fix this error?

INCLUDE UCS0_SPTA_ERROR_REACTION OBJECT DOKU ID TX

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message UCS0123 - No resources available for task &1; see long text ?

  The SAP error message UCS0123 indicates that there are no resources available for a specific task, which is identified by the placeholder &1. This error typically occurs in the context of SAP's Capacity Planning or Resource Management modules, where tasks or operations require specific resources (like personnel, machines, or materials) to be executed.
  Cause:
  
  Resource Unavailability: The most common cause is that the required resources (e.g., machines, labor) are either fully booked, not allocated, or not available during the time the task is scheduled.
  Incorrect Resource Allocation: The task may be scheduled for a time when the resources are not available due to maintenance, other commitments, or scheduling conflicts.
  Configuration Issues: There may be issues with the configuration of the resources in the system, such as incorrect capacity settings or missing resource definitions.
  Capacity Constraints: The system may have defined capacity constraints that prevent the allocation of resources to the task.
  
  Solution:
  
  Check Resource Availability: Review the availability of the resources required for the task. You can do this by checking the resource calendar or capacity planning reports.
  Adjust Scheduling: If the resources are not available at the scheduled time, consider rescheduling the task to a time when the resources are free.
  Review Resource Configuration: Ensure that the resources are correctly configured in the system. Check for any missing or incorrect settings that could affect availability.
  Capacity Planning: Analyze the overall capacity planning to ensure that there are enough resources allocated to meet the demand. You may need to increase resource capacity or adjust other tasks to free up resources.
  Consult Long Text: The error message suggests checking the long text for more details. This can provide specific insights or additional instructions related to the error.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CM01 (Capacity Planning) or CM21 (Capacity Leveling) to analyze resource allocation and availability.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Refer to SAP documentation on Capacity Planning and Resource Management for best practices and troubleshooting steps.
  Support: If the issue persists, consider reaching out to your SAP support team or consulting with SAP experts for further assistance.
  
  By following these steps, you should be able to identify the cause of the UCS0123 error and implement a solution to resolve it.