Answers Database 2.1i, M1.5, M1.4 MAP, LOGIBLOX: Map:ERROR:x4kma:179 - <symbolname> symbol "instance" cannot be packed into an IOB Record #4406 Product Family: Software Product Line: FPGA Implementation Product Part: map Product Version: 2.1i Problem Title: 2.1i, M1.5, M1.4 MAP, LOGIBLOX: Map:ERROR:x4kma:179 - <symbolname> symbol "instance" cannot be packed into an IOB Problem Description: Urgency: Standard Map returns the following error for a design containing Logiblox components: "ERROR:x4kma:179 - BI_BUF_8 symbol "L24" cannot be packed into an IOB. You may be attempting to put more resources into an IOB than it can support. Please see the Xilinx Programmable Logic Data Book for information on the IOB structure of the target device." This error message may actually be flagging the existence of an unused net on a bus connected to the external end of a Logiblox Inputs/Outputs module. Solution 1: Connect the dangling net to an IOPAD. End of Record #4406 - Last Modified: 06/18/99 16:53

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