Home / Platform Considerations
64-bit Notes Client
When migrating to or from HCL Notes/Domino or NSF files, we recommend installing a 32-bit Notes client on the migration machine.
If the migration machine has a 64-bit Notes client installed and you are using Transend Migration Console (TMC) v2.x or earlier, follow the steps below to configure TMC for use with the 64-bit Notes client.
Note: The following steps apply only to Transend Migration Console v2.x and earlier. TMC v3.x and later automatically detects the installed Notes client bitness and applies the appropriate configuration; no manual adjustment is required.
Enable migration support with a 64-bit Notes client:
On the Configuration Settings > Optional screen, select the Advanced Options tab at the top.
Check the “I know what I’m doing! Edit Advanced Options” checkbox.

Scroll down to the bottom right of the screen to Custom Options.
Enter /NOTES64 into the Custom Options field.

Click Continue at the top right of the screen.
You have now enabled support with a 64-bit Notes Client.
64-bit Notes client detection notices
If a 64-bit Notes client is detected but /NOTES64 has not been enabled as described above, the following Error message will display in the migration log file:
- TM Error: Transend requires that the 32 bit Notes client be installed, unless /NOTES64 is enabled in Custom Options
If /NOTES64 is enabled as described above, and a 64-bit Notes client is detected during migration, the following Warning message will display in the migration log file:
- TM Warning: for optimal performance, Transend recommends using the Notes 32 bit client for this application
If /NOTES64 is enabled as described above, but a 64-bit Notes client is not detected, the following Warning message will display in the migration log file:
- TM Warning: no 64 bit Notes client is detected, using 32 bit instead

