Answers Database M1.4 MAP:ERROR:x4kma:371 - IBUF symbol "symbol_name" is unable to combine with ... Record #3407 Product Family: Software Product Line: FPGA Implementation Product Part: map Product Version: 1.4. Problem Title: M1.4 MAP:ERROR:x4kma:371 - IBUF symbol "symbol_name" is unable to combine with ... Problem Description: CLB range constraints can be applied to hierarchies and map is supposed to apply these constraints only to logic that will be mapped into CLBs. Instead map is incorrectly applying the constaints to all logic. This can results in errors if I/O symbols are inside the hierarchy. ERROR:x4kma:371 - IBUF symbol "HOSTBUS/HSTIO/$1I2709" (output signal=HOSTBUS/HSTIO/$1N2710) is unable to combine with I/O HOSTBUS/HSTIO/EXT_HSTDAT7. The symbo ls have incompatible LOC attributes. ERROR:x4kma:175 - IBUF symbol "HOSTBUS/HSTIO/$1I2709" (output signal=HOSTBUS/HSTIO/$1N2710) cannot be placed into IOB "HOSTBUS/HSTIO/EXT_HSTDAT7". You may be attempting to put more resources into this IOB than it can support. Please see the Xilinx Programmable Logic Data Book for information on the IOB structure of   the target device. FATAL_ERROR:baste:basteconst.c:438:1.26 - Shouldn't be combining LOCs with different types. Process   will terminate. Please call Xilinx support. Solution 1: This problem is scheduled to be fixed in the M1.5 release. Meanwhile, the problem can be worked around by moving all I/O symbols outside of hierarchies that have CLB range constraints applied to them. End of Record #3407 - Last Modified: 02/06/98 15:27

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