This symptom very rarely occurs on Windows systems which are set to a Mediteran or Eastern European language like FR, CZ, PL. The error is caused by the fact that some Plug-In files could not be found. This error can appear when the name of the current User Account in which the Plug-In is installed, contains special text signs such as `´ ˆŠ and others. Mediteran or Eastern European languages contain a couple of those special signs.
To solve this issue, create a new user account, use a name without special signs. Then set up the whole directory:
Then start Lightroom and reload the ColorChecker Passport Plug-In from the new user account.
To find instructions on how to load the ColorChecker Passport Plug-In manually in Lightroom (3), please visit this link:http://www.xrite.com/product_overview.aspx?ID=1257&Action=support&SupportID=5294