Excel application not invoked using client_ole2.create_obj('Excel.Application'); after migrating to

Hi,

We have two type of excel usage in our Oracle forms. ( We have Webutil in place).

In first type, we use web.show_document to open the excel file from the local drive --> it is opening successfully after migration to 12C.

In 2nd type : we take a existing template (present at C drive) , fill the data there and try to launch the excel application using the below command, however it is failing,

client_ole2.create_object ('Excel.Application');

It is failing now. After execution of this line, whole application freezes and button etc.. stop working. we have to kill the application.