Importing XLS Causing Resource Assignment Duplication

not ture David I import and export without cost account ALL the time. Just throw the switch off and you will never get duplicates.

just because you have a cost code does NOT mean you cant duplicate the resource and the cost code.  

You can have the cost code in there twice. But not if you throw the switch 

You should alwasy export and import the cost account along with the rest of the resource assignment information, even if you do not use it, as it is part of the index for the assigment.  If you don't you are likley to duplicate

The software is onyl doing what you are telling it to do you are telling it to import the resource and is did it wil do it over and over and over agin if you tell it to. You can also tell it to NEVER assign the resouce to the same activity more than once.

here is how

go to the projects directory and make sure that your project is highlighted

then select show on bottom then project details 

now go to the Resources tab in the lower right under Resource Assignments

make sure that Resources can be assigned to the same activity more than once is NOT checked.