Error(vcom-19): Failed to access library 'altgxb_lib' at "altgxb_lib" - Error(vcom-19): Failed to access library 'altgxb_lib' at "altgxb_lib" Description This error message may occur in the ModelSim ® -Altera ® simulator when you simulate a VHDL post-fit netlist for certain intellectual property (IP) functions that use the Stratix ® GX altgxb megafunction. The name altgxb_lib is referenced in the VHDL Output File ( .vho ). The precompiled library in the ModelSim-Altera simulator is named altgxb instead of altgxb_lib . To resolve this naming inconsistency, map the library name altgxb_lib to altgxb using the following command: vmap altgxb_lib altgxb Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['novalue'] novalue novalue ['Programmable Logic Devices', 'Stratix® GX FPGA'] ['novalue'] ['novalue'] ['novalue']