Client.ole2 is not working

Question

Hi i'm migrating to from fomrs 4.5 to 10g as DDE package are not supported in the
10g. i'm using client.ole2
I have written following code to open a stored excel sheet(which is a template for entering the data). this is not working not giving any error.
please tell me where is the error
declare
application client_ole2.obj_type;
workbooks client_OLE2.OBJ_TYPE;
workbook client_OLE2.OBJ_TYPE;
worksheets client_OLE2.OBJ_TYPE;
worksheet client_OLE2.OBJ_TYPE;
worksheet2 client_OLE2.OBJ_TYPE;
worksheet3 client_OLE2.OBJ_TYPE;
args1 client_ole2.list_type;
L_PATH VARCHAR2(100);
COMMAND1 VARCHAR2(5000);
BEGIN
     l_PATH := SFN_GET_DIRECTORY_PATH('DIR0003');
COMMAND1 := L_PATH||'\Formats\EMP_NEW_UPLOAD.xls';
application := Client_OLE2.create_obj('Excel.Application');
workbooks := Client_OLE2.Get_Obj_Property(application, 'Workbooks');
args1 := Client_Ole2.create_arglist;
Client_Ole2.add_arg(args1, 'c:\emp.xls');
workbook := Client_Ole2.invoke_obj(workbooks, 'Open', args1);
worksheets := Client_Ole2.get_obj_property(workbook, 'worksheets');
CLIENT_OLE2.destroy_arglist(args1);
CLIENT_OLE2.SET_PROPERTY(application,'Visible',1);
CLIENT_OLE2.SET_PROPERTY(application,'DisplayAlerts',0);
end;

Answer 1

As Gerald Krieger suggests, it sounds as if you have not installed the Jacob library correctly. Most WebUtil functions, like CLIENT_GET_FILE_NAME, are included in the base 10g install -- OLE functionality, however, is not. This is because the Jacob library, which is required for OLE support, is not an Oracle product and, as such, could not legally be distributed by Oracle.
Jacob can be downloaded from http://sourceforge.net/projects/jacob-project
Configuring the OC4J for developing/testing OLE-enabled forms involves these steps:
1. Download the Jacob library and extract two files -- jacob.jar & jacob.dll
2. Place a signed copy of jacob.jar in ...\forms\java
3. Place a copy of jacob.dll in ...\forms\webutil
4. If you are not using Jacob 1.8, but are instead using a different version, you must edit ...\forms\server\webutil.cfg by locating the line which contains install.syslib.0.7.1=jacob.dll|94208|1.0|true and replacing 94208 with the size (in bytes) of your particular version of jacob.dll
If these instructions are unclear, please accept my apologies and refer to the WebUtil documentation for details.
Finally, be aware that your forms will not deploy correctly unless ...\forms\webutil.pll has been compiled. You must be connected to a WebUtil-ready database in order for webutil.pll to compile successfully.
Hope this helps,
Eric Adamson
Lansing, Michigan