How To Fix IST_TC018 - CL_IST_TC_MEMORY class has not been instantiated

IST_TC018 - Overview

• Message type: E = Error

• Message class: IST_TC - Telecom Classes

• Message number: 018

• Message text: CL_IST_TC_MEMORY class has not been instantiated

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 IST_TC018 - CL_IST_TC_MEMORY class has not been instantiated ?

  The SAP error message "IST_TC018 CL_IST_TC_MEMORY class has not been instantiated" typically indicates that there is an issue with the instantiation of a class in the SAP system, specifically the CL_IST_TC_MEMORY class. This error can occur in various scenarios, often related to custom developments or specific transactions that rely on this class.
  
  Cause:
  
  Class Not Instantiated: The error suggests that the class CL_IST_TC_MEMORY has not been instantiated properly before it is being used. This could be due to a missing or incorrect instantiation code in the ABAP program.
  Missing Implementation: The class might not be implemented in the system, or there could be a version mismatch if the class is part of a custom development or an add-on.
  Authorization Issues: Sometimes, the user might not have the necessary authorizations to access or instantiate the class.
  
  Configuration Issues: There may be configuration settings that are not correctly set up, leading to the class not being available