ALTERA DOES NOT WARRANT THAT THE FUNCTIONS CONTAINED IN THIS PATCH
WILL MEET YOUR REQUIREMENTS, OR THAT THE OPERATION OF THIS PATCH
WILL BE UNINTERRUPTED OR ERROR-FREE.

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quartusii-13.1.4-4.55-readme.txt
Readme file for Quartus II 13.1.4 Patch 4.55
Copyright (C) Altera Corporation 2014 All right reserved.
Patch created on December 04 2014
Patch Case#: 243431
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Description

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The design (test_6_2_5) preserving strictly preserved partitions, going through an export and re-import is failing in ASM with bit setting mismatches due to missing routing constraints.

- The missing routing constraints are routes going from unsafe clkbuf from outside the safe partition driving registers in the strictly preserved partition. When splitting and export the routing constraints for the safe partition, those routes were discarded by mistake because the RCF processing code filtered those routes away as it identifies the unsafe clkbuf by atom name, but RCF uses the clkbuf oterm name which turns out to be different from the atom name.

- The fix is to teach the RCF processing code (in split and export) to recognize clkbuf by oterm names as well.

- All changes are guarded for strict preservation flows only and should have no impact to other QIC flows.



Caution - You must either have previously installed the
          Quartus II 13.1.4 software or must
          install the Quartus II 13.1.4 software
          before installing this patch. Otherwise, the patch will
          not be installed correctly and the Quartus II
          software will not run properly.