you're right the iconvd.lib and iconvd.dll were actually created, i just didn't see them. many thanks

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Edit lib/Makefile.msvc and change -Feiconv.dll to -Feiconvd.dll, and compile using

nmake -f Makefile.msvc NO_NLS=1 DLL=1 MFLAGS=-MDd DEBUG=1 PREFIX=C:\iconv-1.11.win64

This will fail to compile the programs, but should create the library.

Did you read this last statement? Once you have the files iconvd.dll and iconvd.lib, you don't need to go any further compiling the iconv stuff. You only need these two files. Copy them to where you have your iconv.dll and iconv.lib files and go back to compiling MonetDB.

-- Sjoerd Mullender