64-bit client cannot connect to 32-bit server|Classic OPC: DA|Classic OPC: DA, A&E, HDA, XML-DA, etc.|Forum|OPC Foundation

Hello everyone,

I am opening a topic which is the exact contrary of an already existing topic.
I am having trouble accessible a 32-bit server with OPC DA and I have been doing some digging into the registry to better understand why.

The 32-bit server has only these two registry:

• HKEY_CLASSES_ROOT\CLSID\{CLSID of the Server}
  • Implemented Categories
    • {63D5F430-CFE4-11D1-B2C8-0060083BA1FB}
    • {63D5F432-CFE4-11D1-B2C8-0060083BA1FB}
  • InprocServer32
    • • (Default) String REG_SZ: C:\Program Files\…\OPCServer\OPC.dll
      • ThreadingModel String REG_SZ: both
  • ProgID
    • (Default) String REG_SZ: ServerOPC.1
  • VersionIndependentProgID
    • (Default) String REG_SZ: ServerOPC
• HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{CLSID of the Server}

Whereas I understand that a 64-bit client look at these addresses

• HKEY_CLASSES_ROOT\WOW6432Node\CLSID\{CLSID of the Server}
• HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AppID\{CLSID of the Server}
• HKEY_CLASSES_ROOT\WOW6432Node\AppID\{CLSID of the Server}

I have thought of different solutions

1. Have a 64-bit client but manually add the 3 registry entries on the 32-bit machine
2. Have a 32-bit client (must be installed on 32-bit machine?) that DO look the way it needs to look a 32-bit registry
3. Build a client that will fetch the 32-bit registry
4. Install OPC Core component 64-bit on the 32-bit machine but i don’t know if it would break something in the already running system
5. Install OPC Core component 32-bit on the 64-bit remote machine 
6. Use a 32-bit virtual machine on the 64-bit remote machine

My end-goal is to remotely access the OPC DA server and convert it to the OPC UA server. I do prefer make the conversion on a remote system rather than on the machine. If it ends up not being possible, I am open to suggestion on how to build a OPC DA > OPC UA gateway to avoid paying licenses of thousands dollars per machines. 

Thank you for your help, 
Have a great end of week.

EDIT: On the 32-bit machine, running the 32-bit OPC DA server there is a client that I suppose to be 32-bit as well. This client can browse localy and finds itself in a second, however it cannot find itself if I do a remote connection putting the exact OPC Server name and the Hostname (found with cmd>hostname). I do believe that once I troubleshoot this issue, it will unlock a lot of answers.