You value only article may not have been maintained properly when created. you need to check properly on article maintenance like if any required field is missing in your article master data and so on.
Possible causes:
- Reference article was not maintained in full
- Inconsistent maintenance of article
Possible actions:
- Maintain reference data
- Call transaction WSPK to edit the faulty segments
Once you rectify article maintenance error, you should able to list your value only article through WSP7 Tcode.
