I have both 32 | 64 bit Oracle Clients.
C:\Oracle\instantclient_12_2\
C:\Oracle\instantclient_12_1_64\
The file oci.dll exists in following paths
C:\Oracle\instantclient_12_2\
C:\Oracle\instantclient_12_2\bin
C:\Oracle\instantclient_12_1_64\
i have tried all but no luck and same error.