How To Fix DT110 - Enter a valid table type (Type & not known)

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 110

• Message text: Enter a valid table type (Type & not known)

What causes this issue?

An incorrect entry was made for the table type of table DD02V.

System Response

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

How to fix this error?

Try to change the table type to the correct type using the table
maintenance Transaction SE11.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT110 - Enter a valid table type (Type & not known) ?

  The SAP error message DT110, which states "Enter a valid table type (Type & not known)," typically occurs when you are trying to define or use a table type in ABAP (Advanced Business Application Programming) that is not recognized by the system. This can happen in various contexts, such as when defining data structures, creating function modules, or working with data dictionary objects.
  Cause:
  
  Invalid Table Type: The specified table type does not exist in the system. This could be due to a typo or because the table type has not been created yet.
  Namespace Issues: If you are using a custom table type, it may not be in the correct namespace or may not be activated.
  Transport Issues: If the table type was recently transported from another system, it may not have been properly imported or activated in the target system.
  Authorization Issues: Lack of proper authorizations to access certain table types can also lead to this error.
  
  Solution:
  
  Check Table Type: Verify that the table type you are trying to use is correctly defined in the Data Dictionary (SE11). Ensure that there are no typos in the name.
  Create Table Type: If the table type does not exist, you may need to create it. Go to transaction SE11, select "Data Type," and create a new table type with the required structure.
  Activate Objects: If you have recently created or modified the table type, ensure that it is activated. You can do this in SE11 by selecting the table type and clicking the "Activate" button.
  Check Transport Requests: If the table type was supposed to be transported from another system, check the transport request to ensure it was successfully imported and activated.
  Namespace Check: Ensure that you are using the correct namespace for custom objects. Custom table types should typically be prefixed with a Z or Y.
  Authorization Check: Ensure that you have the necessary authorizations to access the table type. You may need to consult with your SAP security team if you suspect authorization issues.
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE80 (Object Navigator), SE37 (Function Module), SE24 (Class Builder).
  Documentation: Refer to SAP Help documentation for more details on data types and table types in ABAP.
  Community Forums: SAP Community and other forums can be helpful for finding similar issues and solutions shared by other users.
  
  If the problem persists after trying the above solutions, consider reaching out to your SAP Basis or ABAP development team for further assistance.