This article was previously published under Q183656
When you run the XCOPY command with certain dates using the /d:00-00-00switch, you may receive one of the following error messages:
Invalid number of parameters
For example, the dates, Oct 31, Dec 31, and Feb 29 (in leap year) arecorrect dates; however, XCOPY treats these dates as invalid.
Ulib.dll used by XCOPY interprets certain dates as invalid.
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in theMicrosoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.