Why does my synthesis fail on the floating-point library blocks? - Why does my synthesis fail on the floating-point library blocks? Description Synthesis may fail with designs that include floating point library blocks. This issue affects all designs that use floating-point library blocks. The design fails. Resolution To work around the issue, perform the following steps: In the import directory that DSP Builder creates ( DSPBuilder_ <modelname> _import ), when you compile (which fails), create a file called aaa_add.tcl (alphabetically first so it runs before other files). Add the following lines to that file: set quartus_dir $::env(QUARTUS_ROOTDIR) if [info exists ::env(DSPBA_HDL_DIR)] { set dspba_hdl_dir $::env(DSPBA_HDL_DIR) } else { set dspba_hdl_dir /dspba/Libraries } set_global_assignment -name VHDL_FILE /vhdl/fpc/hcc_package.vhd set_global_assignment -name VHDL_FILE /vhdl/fpc/math_package.vhd set_global_assignment -name VHDL_FILE /vhdl/fpc/hcc_implementation.vhd set_global_assignment -name VHDL_FILE /vhdl/fpc/math_implementation.vhd set_global_assignment -name VHDL_FILE /vhdl/fpc/fpc_library_package.vhd set_global_assignment -name VHDL_FILE /vhdl/fpc/fpc_library.vhd Create another file called aaa_add_msim.tcl . Add the following lines: set base_dir "<path to your DSPBA rtl directory>" set quartus_dir $::env(QUARTUS_ROOTDIR) if [info exists ::env(DSPBA_HDL_DIR)] { set dspba_hdl_dir $::env(DSPBA_HDL_DIR) } else { set dspba_hdl_dir /dspba/Libraries } file delete -force /fpc vlib fpc vmap fpc /fpc vcom -quiet -93 -work /fpc "/vhdl/fpc/hcc_package.vhd" vcom -quiet -93 -work /fpc "/vhdl/fpc/math_package.vhd" vcom -quiet -93 -work /fpc "/vhdl/fpc/hcc_implementation.vhd" vcom -quiet -93 -work /fpc "/vhdl/fpc/math_implementation.vhd" vcom -quiet -93 -work /fpc "/vhdl/fpc/fpc_library_package.vhd" vcom -quiet -93 -work /fpc "/vhdl/fpc/fpc_library.vhd" Rerun the complation. This problem is fixed in DSP Builder v13.1. Custom Fields values: Troubleshooting novalue ['FPGA Dev Tools Quartus II Software'] 13.1 10.1