DB client tool -- To get the error message when open toad oracle client I have a serious problem with toad oracle client. I got the error message as following when I open toad client (installed and then opened it):


  Error: No valid Oracle clients found. You need at least one 64-bit
  client properly configured


Please do me a favor to give me how to deal with this issue or give me any slim clue.

Download from toad official website with 64-bit like as following picture
Depending on YouTube video from @Philᵀᴹ, I have done this problem and I will try to list all I know and every step as following content, Hopefully I can help someone who has the same issues.


Download and Install Toad for Oracle v12.10


Open it you should can not use like as below error message


Download Instant Client 12.2


Unzip it and move it to anywhere you like (for example C:\app\instantclient_12_2)


Go to Control Panel\All Control Panel Items\System-->Environment Variable to "Add" TNS_ADMIN as like below picture


The same path to "Edit" Path like as following picture



OK done with toad client


To move your old tnsnames.ora to C:\app\instantclient_12_2 (for example)






Done all