dynamic flat file destination

my destination flat file is dyanmic,  based on column values,  i populate flat file

connection string will be like this

"C:\Data\LocationData\Loc_123.csv"
"C:\Data\LocationData\Loc_456.csv
"C:\Data\LocationData\Loc_789.csv"

in flat file connection string expression i am setting like this


""C:\Data\LocationData\Loc_"++  @[User::locid] +   ".csv"

@[User::locid] getting data by running sql query from table, it is dynamic

getting error message file not exists, 

is it possible to create file dynamically 


Thanks

V