[Kappe]

I am using a UDF to oscillate my Geometry. When i compile the UDF in Fluent i get the the following message:

1 file(s) copied.
1 file(s) copied.
1 file(s) copied.
(system "copy C:\Fluent.Inc\fluent6.2.16\src\makefile_nt.udf libudf\ntx86\2ddp\makefile") 1 file(s) copied.
0
(chdir "libudf")()
(chdir "ntx86\2ddp")()

Done.

When i try to load it i get the following error:

Opening library "libudf"...
Error: open_udf_library: The system cannot find the file specified.

Error Object: ()

The log file says:

Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 14.00.50727.42 for 80x86
Copyright (C) Microsoft Corporation. All rights reserved.

'sed' is not recognized as an internal or external command,
operable program or batch file.
NMAKE : U1077: 'C:\WINDOWS\system32\cmd.exe' : return code '0x1'
Stop.

Please recommend how can I eliminate this error.