Hi..
SAP don’t allow save plan data with cost center or cost element which is different from them you input in selection screen(initial screen).
To avoid the problem, you set default range as below picture and select free type for entry.
What do you mean by saying “Also FI document is not generated as it is generated in CO” ?
You mean that you want to transfer plan data from Overhead Cost Accounting to General Ledger Accounting.
If yes, Refer to SAP Help portal site:http://help.sap.com/erp2005_ehp_07/helpdata/en/87/231ffdb4e9494ea529a99c23aa2a56/content.htm?frameset=/en/2d/830e405c538f5ce10000000a155106/frameset.htm