As you see in the image WebDBEdit (Articolo) is referenced to a XDataWebDataset located in frmDMM_IE.wsDMM_T BUT i've a problem that delphi (often) show me a message 'Cannot link to form ... which is not uses...'. This is a correct way to link a control to another dataset which is located to another form ? or i must create indipendent dataset for every form and copy a record ?
You at least need to add this other form unit to the uses list and normally use a data module with the datamodule unit added to the uses list.