dear Jochen

I do NOT need to specify date, date is optional -- please take a look at xcopy help:
Copies files and directory trees.

XCOPY source [destination] ... [/D[:date]] ...
/D:m-d-y ... If no date is given, copies only those files whose
source time is newer than the destination time.

After all it works from command prompt and in batch file.
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sy, orest