Fix crash after sending E-Mail in Delphi 12
some bugfixes
Packages for Delphi 10.4
The OnGetCellData has a parameter with the name purpose. If this is cdpForSave then you know that a particular cell needs to be saved.
Take a closer look at TCellComboBoxInfo in OVCTCMMN.PAS. The layout of that record had to be changed a bit. So make sure that you return a record with the correct layout to the table.
A person who managed this project had it in their settings and insisted that it be there. Delete it and you should be fine.
Menu "Project"->Options...->Delphi compiler (top node in the treeview)
Delphi 4 is nearly 20 years old. We don't support it anymore.