Custom module relate to Products module issue

[kennyzong]

Dear, when I created a custom module, and related it to Purchase Order module, it works fine, I can add or select records of the custom module under Purchase Order module, but when I try to creat a custom module and relate it to Products module, something is wrong, I can add/delete records in the custom module, but there is no any record when I select or add records of the custom module under Products module, any idea?

[kennyzong]

More details, When I creat a custom module and related it to Products module under VT version 6.0, it works fine, but when I update VT to 6.1 version, no record will be shown when I select or add records of the custom module under Products module