This error has been corrected in the upcoming release to NV2 (2.09.7) which should be released this week.
The problem is that one or more payroll transactions are being entered in the Canada Payroll journal which were not associated with a Paycheck created from PAYRUN or TCPROCES.
Version 2.08 allowed this to import whilst the current version 2.09.6 will not.
Wait till 2.09.7 is released and import again. Fixing the problem in NV1 could be tedious so wait till 2.09.7.
Sorry for any inconvenience.