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AR# 35872 12.1 NGDBUILD - Crash during DRC check if IDDR has unconnected D input

My design fails during NGDBUILD.It crashes inthe phase "Checking expanded design ..." Are there any known problems that can explain this failure?
A problem has been seen where NGDBUILD will crash during this phase when an IDDR with an undriven D pin is encountered. This problem has been fixed for ISE software 12.2, currently scheduled for late July 2010. Meanwhile, there is no workaround other than to modify the circuit involved. A patch for ISE 12.1 can be requested by opening a webcase and referring to this Answer by number.
AR# 35872
Date Created 05/28/2010
Last Updated 12/15/2012
Status Active
Type General Article
Devices
  • Spartan-3
  • Spartan-3 XA
  • Spartan-3A
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  • Spartan-3A DSP
  • Spartan-3AN
  • Spartan-3E
  • Spartan-6 LX
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  • Virtex-5 FXT
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  • Virtex-5 LXT
  • Virtex-5 SXT
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  • Virtex-6 CXT
  • Virtex-6 HXT
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  • Virtex-6 LXT
  • Virtex-6 SXT
  • Less
Tools
  • ISE Design Suite - 12.1