find /opt/projectname/bin -type f /opt/projectname/bin -prune -o -print
find: missing conjunction

/opt/projectname/bin/file_1_is_printed
/opt/projectname/bin/file_2_is_printed
/opt/projectname/bin/directory_within_bin/some_file_should_not_be_printed
/opt/projectname/bin/directory_2_within_bin/some_file_2_should_not_be_printed

/usr/bin/find:
         find.c $Date: 2011/08/12 15:04:36 $Revision: r11.31/4 PATCH_11.31 (PHCO_42158)
         libcpio.c $Date: 2008/05/27 16:08:10 $Revision: r11.31/2 PATCH_11.31 (PHCO_36666)
         $Revision: @(#) find R11.31_BL2011_0923_2 PATCH_11.31 PHCO_42158

find /opt/projectname/bin/. -name . -o -type d -prune -o -print

find /opt/projectname/bin -path '/opt/projectname/bin/*/*' -prune -o -type f -print

find /opt/projectname/bin/* -type f -print -o -prune