
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.

//****************************************************************
quartus-24.2-0.64-readme.txt
Readme file for Altera(R) Quartus(R) Prime 24.2 Patch 0.64
Copyright (C) Altera Corporation 2026 All right reserved.
Patch created on Jan. 14, 2026, 3:09 p.m.
Patch Case#: 14026809289
Patches included: 
Patches conflicted: 
Patch prerequisites: 

//****************************************************************

Description:

Patch# 0.64: 
 Beginning January 10, 2026, executing commands in the terminal or GUI of Quartus® Prime Pro Edition software, Quartus Embedded Edition software or select standalone tools may cause the software or tool to crash with an error similar to the crash signature shown below.  This error affects:  

Quartus Prime Pro Software versions v23.3 through v25.3.1 

Standalone Quartus Prime Pro Programmer v23.3 through v25.3.1 

Standalone Quartus Prime Pro Embedded Edition v25.3 and v25.3.1 

Standalone Quartus Prime Pro Power Thermal Analyzer v25.3 through v25.3.1 

This issue is not observed in Quartus Prime Pro Edition versions 23.2 or prior or Quartus Prime Standard Edition.

Crash Signature:  

Error (22912): Unhandled exception:  

Fatal Error: Assertion failed tools/cpp/ddm/ddm_assessor.cpp:53: DDM_T::verify_token(token) : Cannot identify the client 

 from function assertion_error in tools/cpp/ddm_report/ddm_report_msg.cpp@465 

  

*** Fatal Error: Program termination requested 

*** 

*** Below is the stack trace at the time the error occurred. 

*** The lines beginning "Err Handler" represent frames relating 

*** to generating this report. 

*** The point at which the error occurred is somewhere after these lines. 

*** There may be a few frames representing standard/library code 

*** before the Quartus frames begin. 

*** The search for the error should begin with the Quartus frames. 

  

*** Unwinder: libunwind 

*** Stack depth: 15 

  

  Quartus          0x24e67: err_terminator() + 0x1bc (ccl_err) 

  Quartus          0xb036a: __cxxabiv1::__terminate(void (*)()) + 0xa (stdc++) 

  Quartus          0xb03d5: (stdc++) 

  Quartus          0xb0628: (stdc++) 

  Quartus          0x1680d: void ddm_throw<DDM_RUNTIME_ERROR>(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) + 0x26d (ddm_report) 

  Quartus          0x13fae: DDM_REPORT::DDM_ASSERTION_HANDLER::assertion_error(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) const + 0xde (ddm_report) 

  Quartus          0x12a52: DDM_REPORT::ASSERTION_HANDLER::error(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) + 0x72 (ddm_report) 

  Quartus          0x13e64: DDM_REPORT::detail::assert_at_line(char const*, char const*, int, char const*, ...) + 0x1b4 (ddm_report) 

  Quartus         0x205fb0: ddm_set_lassessor(DDM_T_ASSESSOR*, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) + 0x60 (ddm) 

  Quartus          0xf4445: DMS_MANAGER::DMS_MANAGER() + 0x5c5 (dni_dms) 

  Quartus          0xf45b2: DMS_MANAGER::get() + 0x7a (dni_dms) 

  Quartus          0xf6db4: _GLOBAL__sub_I_dms_manager.cpp + 0x58 (dni_dms) 

  Quartus           0x647e: (ld-linux-x86-64) 

  Quartus           0x6568: (ld-linux-x86-64) 

  Quartus          0x202ca: (ld-linux-x86-64) 




Caution - You must either have previously installed the
          Altera(R) Quartus(R) Prime 24.2 software or must
          install the Altera(R) Quartus(R) Prime 24.2 software
          before installing this patch. Otherwise, the patch will
          not be installed correctly and the Altera(R) Quartus(R) Prime
          software will not run properly.

Note:
<Patches included> - means this patch includes those patches. If you
    already installed those patches, you can safely install this new
    patch on top.
<Patches conflicted> - means this patch conflicts with those patches.
    If you have any of those patches installed, don't install this patch.
    Contact Altera for further support.
