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.

//****************************************************************
quartusii-13.1.4-4.47-readme.txt
Readme file for Quartus II 13.1.4 Patch 4.47
Copyright (C) Altera Corporation 2014 All right reserved.
Patch created on September 09 2014
Patch Case#: 229745
//****************************************************************


Description: This patch fixes the following Internal Error:

Internal Error: Sub-system: OPT, 
File: /quartus/synth/opt/opt_dsp_wys.cpp, Line: 1688
result_sign != ALGS_ARITH_MGR::UNKNOWN
Stack Trace:
0xfff43: opt_get_mls_helpers + 0xa51c3
0x100254: opt_get_mls_helpers + 0xa54d4

...
End-trace


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.