retrieve data from multiple tables using datetimepicker

Question

Hello sir, im doing a project in c# and i'm using rdlc report to retrieve the data from multiple table using date time picker .  to filter data i'm using 2 date time picker as from and to date sir and i get an error like this sir,.   

An attempt to attach an auto-named database for file E:\pwd\pwd\pwd\bin\Debug\db\pwddb.mdf failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.

 

now i don't know how to proceed further so please help me in this sir .

thanks in advance