Dear Kevin
Although QCWIN is not certified compatible with the Windows ME Operating System, I doubt that this error message is related to this.
The error is a warning only type message. Although it is annoying, it is letting you know that 1 of the checks you printed contained detail type(s) that were not defined in the check specification, so it can't print them on the check.
I would go into the Check Designer and check to ensure that:
1. If you are using QCW for TBR checks, that you have an Advice Detail section for Time and Billing.
2. If you are using QCW for JC checks, that you have an Advice Detail section for Job Cost.
3. If you have 2 Advice sections on your check, then you must have 2 Advice Detail sections on your Designer specification as per above.
Hope this helps.