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help with Data Export/Import

This is the first time I am trying to import/export data. My org has around 5000 records Acount and contact  

which I want to copy to configuration sandbox  (we donot have full copy ) . 


I know I can do it through dataloader and Import wizard too. 


I tried dataloader : it exports fine(around 3000 account record)  but only import s 1500 records . Rest are in error file . we do have recordtypes  . Is there any way to check why import is failing ?


If I want to use Import wizard : Do I need to make one CSV file for Account and Contact ? This is what I understood from Help .how would I map fields then ?


Any kind of help or advice is appreciated .










The last column of the error file should have the reasons for the failures.



Nazeer AhamedNazeer Ahamed

For Developers Apex Data Loader might be very handy and useful, For me it is all the time than import wizard!