ORA-28365: wallet is not open

Hi,

I created tablespaces with encryption and the wallet status shows open but when I am running impdp using network link data copy for every table is failing with below message.

-------------------------------------------------------------------------

ORA-28365: wallet is not open

-------------------------------------------------------------------------

Wallet is already opened but still getting the error. I am doing this on 12c database. Source is not encrypted , target database  tablespaces are encrypted.

I tried using encryption_password parameter in impdp parfile, seems this is not allowed with network link parameter in the parfile.

Any help/suggestions are appreciated.

Thank you.