we've got a batch-job problem with all novell client versions greater

In our software we're using several Batch jobs processing DOS COPY
With novell client greater 4.91SP2 the copy command fails without any
failure message,
... the files that should be copied are just missing.

When we replace copy with ncopy the problem disappears.
This is no solution because our customers don't have ncopy, mostly ;-)

Some example how the copy fails in a batch-job:

f: ( go to network drive )
cd somewhere ( go to to some directory )
copy c:\test\example.db f:\example2.db


f:\example.db2 does not exist.

Has anyone any idea what difference between Client 4.91SP2 and 4.91SP3(4)
could cause that ?