[manshu]

When I build the UDF on linux system by using ANSYS FLUENT 18.1, the following error occurs:

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# linking to ../../src/makefile in lnamd64/3d
# linking to ../../src/user.udf in lnamd64/3d

# building library in lnamd64/3d
make[1]: Entering directory 'bftest/libudf/lnamd64/3d'
make[1]: *** No rule to make target 'example.c', needed by 'udf_names.c'.
make[1]: Target 'default' not remade because of errors.
make[1]: Leaving directory 'bftest/libudf/lnamd64/3d'

You can also see the 'log'-file in
the working directory for this compilation history

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Then I copy the file 'example.c' from the folder "libudf/src" to "libudf/lnamd64/3d" and everything is OK.