Developer(s)National Instruments
Initial releaseJanuary 1989; 35 years ago (1989-01)
Stable release
2019 / May 2019; 4 years ago (2019-05)
Operating systemWindows XP
Windows Vista
Windows 7
Windows 8
Windows 10
Linux run-time support and Pharlap real-time run-time support
TypeData acquisition, instrument control, test automation, analysis and signal processing

LabWindows/CVI (CVI is short for C for Virtual Instrumentation) is an ANSI C programming environment for test and measurement developed by National Instruments. The program was originally released as LabWindows for DOS in 1987, but was soon revisioned (and renamed) for the Microsoft Windows platform. The current version of LabWindows/CVI (commonly referred to as CVI) is 2020.

LabWindows/CVI uses the same libraries and data-acquisition modules as the better known National Instrument product LabVIEW and is thus highly compatible with it.

LabVIEW is targeted more at domain experts and scientists, and CVI more towards software engineers that are more comfortable with text-based linear languages such as C.

Release history

Starting with LabWindows/CVI 8.0, major versions are released around the first week of August, to coincide with the annual National Instruments conference NI Week, and followed by a bug-fix release the following February.

In 2009, National Instruments started to name the releases after the year in which they are released. The bugfix is called a Service Pack (for instance, the 2009 Service Pack 1 release was published in February 2010).[1]

Name/version Build number Date Operating system support and notes
The LabWindows/CVI project begins 1987
LabWindows/CVI 1.0 Jan 1989 DOS
LabWindows/CVI 2.0 Apr 1991 DOS. GUI Tools and Memory Extender
LabWindows/CVI 3.0 Mar 1994 DOS, Windows 3.1, and Solaris
LabWindows/CVI 3.1 Jul 1995 generate codes automatically
LabWindows/CVI 3.1.1 1995 first release with "application builder" capability
LabWindows/CVI 4.0 May 1996 External C/C++ compiler compatibility
LabWindows/CVI 4.0.1 Aug 1996
LabWindows/CVI 5.0 Feb 1998 support for VXI and IVI
LabWindows/CVI 5.5 Feb 2000 Multithreaded libraries, debugging
LabWindows/CVI 6.0 Oct 2001 ActiveX support, improved presentation
LabWindows/CVI 7.0 Jul 2003 use Workspace
LabWindows/CVI 7.1 Sep 2004 completion automatically
LabWindows/CVI 8.0 Oct 2005 support for .NET assemblies
LabWindows/CVI 8.0.1
LabWindows/CVI 8.1 2006
LabWindows/CVI 8.1.1
LabWindows/CVI 8.5 2007
LabWindows/CVI 8.5.1
LabWindows/CVI 9.0 2008 ANSI C99 support
LabWindows/CVI 9.0.1
LabWindows/CVI 2009 9.1 2009 create 64-bit applications
LabWindows/CVI 2009 SP1
LabWindows/CVI 2010 10.0 2010 Linux support
LabWindows/CVI 2010 SP1
LabWindows/CVI 2012 12.0 2012
LabWindows/CVI 2012 SP1
LabWindows/CVI 2013 13.0 2013 Changed compiler to Clang 2.9. New debugger running in its own process.
LabWindows/CVI 2013 SP1
LabWindows/CVI 2013 SP2
LabWindows/CVI 2015 15.0 2015 upgrade to Clang 3.3
LabWindows/CVI 2015 SP1 15.1 2016
LabWindows/CVI 2017 17.0 2017 Tracepoints, word/semantic highlighting, thread-specific breakpoints, comment/uncomment
LabWindows/CVI 2019 19.0 May 2019 Updates to Source Code Editor: zooming, code snippets, multi-line edits
LabWindows/CVI 2020 20.0 Sep 2020 UTF-8 support

See also