How can I create missing MARC entries for listed Articles?

The answer depends on the number of MARC you are missing.

If you are missing only a few MARC and know when these MARC entries should have been created, use transaction WSPK for this timeframe.

If you are missing very many MARC entries, we propose the following process:

Use the report RWDIFFERENCEMARCWLK1_ENHANCED from  1887806 in a background job, with parallel processing, for all articles and sites that might be affected. Use 500 articles per process and as many processes as you can possibly assign. Let the job run on a weekend and make sure no other processes lock any articles in this time. That should take care of most of the problems.

Then use transaction WSPK and restrict the date to the weekend in question and the option "delete logfiles". You might then receive a list of article/site combinations where mandatory fields are not maintained. A double click on an entry in this list will open MM42 and you can maintain the necessary values. After you have maintained all missing fields, run the transaction again with the same settings. Again, if a list with errors appears, solve the issues and repeat that process until no list of errors appears any more.

Alternatively, you can use transaction WSPK for all dates since the beginning of your listing process. Make sure to restrict the timeframe to only a few days at a time since there are many articles to be reprocessed. Also make sure to flag the "delete logfiles" option.

You can also run WSPK in background for all dates since the beginning of your listing process (that job might run very long) and run it again later to get a list of unresolved issues after all segments have been created which could not be created previously due to locking of article data.