AR# 13087

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4.1i Project Navigator - "ERROR: NgdBuild:25 - cannot both read and write file 'design.ngd'!"

Description


General Description:

When I use the ABEL XST Verilog flow with a top-level schematic, NGDBuild fails and reports the following error:



"ERROR: NgdBuild:25 - cannot both read and write file "design.ngd"!"

Solution


When the ABEL XST Verilog flow is used, the "ngdbuild.rsp" file is missing a line that points to the input design; therefore, NGDBuild perceives that the .ngd file is both the input and output file.



To work around this problem, switch to the ABEL XST VHDL flow, which writes out an accurate .rsp file.



This issue was resolved in the 4.2i version of the ISE software.
AR# 13087
Date 05/14/2012
Status Archive
Type General Article
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