Hello,
LabVIEW 6i is not formally supported by ICP 2.2. There may, however, be a way to get the class support files and specific drivers to work in the upgraded environment (it would not likely be an arduous process). In order to assess this possibility, can you give a list of HW and SW (especially IVI specific drivers) which you are using in your system?
If you decide that you would like revert, there is a formal document with instructions if you want to go back to a previous version of ICP; here is the document that explains how:
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/f0f3879512239b8886256cf3007bee4f?OpenDocument
Also, the following uninstall instructions are directly from the ICP 2.2 readme file:
Uninstall Considerations
Complete the following steps to uninstall IVI Compliance Package 2.2:
1. Select Start»Settings»Control Panel»Add/Remove Programs.
2. Select National Instruments Software and click Remove.
3. Select NI IVI Compliance Package 2.2 and click Uninstall.
Note: After you uninstall IVI Compliance Package 2.2, the IVI Shared Components remain on the system. Complete the following steps to uninstall the IVI Shared Components:
1. Select Start»Settings»Control Panel»Add/Remove Programs.
2. Select IVI Shared Components and click Change/Remove.
Note: If you installed IVI Compliance Package 2.2 as part of another distribution that depends on IVI Compliance Package 2.2, you cannot uninstall IVI Compliance Package 2.2 without uninstalling the dependent product.
I look forward to your repost, in the event you'd like to complete the upgrade.
Thank you,
JLS