topic Re: Error: Class does not implement if_oo_adt_classrun~main method! in Application Development and Automation Discussions

Error: Class does not implement if_oo_adt_classrun~main method!

Former Member — Mon, 15 Feb 2021 16:57:04 GMT

Tutorials: https://developers.sap.com/tutorials/abap-environment-persistence.html
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I followed the instructions to create an ABAP class after a database table was created and activated. The class was also activated before I run it. Eclipse then shows the error:

Error: Class does not implement if_oo_adt_classrun~main method!

The only change I made to the source code is to replace xxx with an arbitrary number of 901. The table is not updated when I verify with F8.

It must be something simple but I can't find anything.

Thanks/Morris.

Re: Error: Class does not implement if_oo_adt_classrun~main method!

Sandra_Rossi — Mon, 15 Feb 2021 17:12:06 GMT

Yes, check again.

Re: Error: Class does not implement if_oo_adt_classrun~main method!

Former Member — Mon, 15 Feb 2021 17:25:23 GMT

Hi Sandra,

Yes, it works now. Thank you for the quick help. What happened if I may ask? I did restart Eclipse before trying.

Morris.

Re: Error: Class does not implement if_oo_adt_classrun~main method!

Sandra_Rossi — Mon, 15 Feb 2021 18:45:01 GMT

I don't know 🙂

Re: Error: Class does not implement if_oo_adt_classrun~main method!

hankatrading — Mon, 05 Jul 2021 17:59:40 GMT

Just activate the changes before trying to test it.

Re: Error: Class does not implement if_oo_adt_classrun~main method!

Rob_McNally — Wed, 13 Oct 2021 10:12:38 GMT

Just in case it is useful for someone searching for reasons for this error.
Here are the reasons i have seen:

.1. the cloud platform account / BTP has logged out due to inactivity while working in ADT/Eclipse. Log back into the cloud platform / BTP account, save & activate the class to fix this.

.2. when working on a single development object, the activation (Shift+F3) has left some part of the development inactive. When activating, choose Activate All (Ctl+Shift+F3) to ensure all objects are active.

Re: Error: Class does not implement if_oo_adt_classrun~main method!

ttt567890 — Thu, 06 Jan 2022 09:10:52 GMT

You should active the class first.

Re: Error: Class does not implement if_oo_adt_classrun~main method!

jose_roberto_milan — Thu, 18 Aug 2022 22:31:57 GMT

Excellent, Thanks for "Remember Activate All Objects". Like a newes classic abapers

Regards,

Robert

Re: Error: Class does not implement if_oo_adt_classrun~main method!

damodara5590 — Thu, 09 Nov 2023 13:44:40 GMT

Hi morris_wang9,

If you have Used that Interface code, Could you Please Share the Sample Code,

am Trying to scheduling Back ground Job using this Interface, it will be helpful for me.

Re: Error: Class does not implement if_oo_adt_classrun~main method!

AnnePetteroe — Fri, 10 Nov 2023 10:19:34 GMT

Hello, While we're happy that you've come to SAP Community to get an answer to your question, you posted your question as an answer in an old thread.I've converted your answer to a comment, but even so -- posting in older threads is not the best way to get guidance.

If you're looking for help, you should ask a new question: https://answers.sap.com/questions/ask.html.

Best regards,
Anne

Re: Error: Class does not implement if_oo_adt_classrun~main method!

FKHAN123 — Tue, 28 May 2024 06:37:50 GMT

Hi I am doing the following tutorial and when I preview my service the data is blank. When try to activate the class I get the error message below Error: Class does not implement if_oo_adt_classrun~main method!

https://developers.sap.com/tutorials/abap-environment-rap100-generate-ui-service.html

Re: Error: Class does not implement if_oo_adt_classrun~main method!

JTK — Tue, 19 Aug 2025 11:23:26 GMT

Hello,
Workaround I've used so far and it worked:
I have created an additional method namely "sub_methods_with_output" as private and moved group_id variable to public section.
Below is the code snippet :

PUBLIC SECTION. INTERFACES if_oo_adt_classrun. DATA: group_id TYPE string VALUE 'xxx'. PRIVATE SECTION. METHODS: sub_methods_with_output IMPORTING io_out TYPE REF TO if_oo_adt_classrun_out.n_out. METHOD if_oo_adt_classrun~main. sub_methods_with_output( out ). ENDMETHOD. METHOD sub_methods_with_output. io_out->write( |[RAP100] Demo data generated for table ZRAP100_ATRAV{ group_id }. | ). ENDMETHOD.