Older Release Notes DevTools (starting at 4.3.0)

Bug fixes

The VertLoc module failed to merge vertices if the merge tolerance were a perfect zero. (4.3.6: February 8, 2016)

The zlib source shipped in base/ext/zlib has been updated to version 1.2.11, January 15th, 2017. (4.4.7: April 29, 2019)
The StrUtil module has been added to provide system independent string utilities for UTF-8 and wide character string conversion and query. (4.4.7: April 10, 2019)
The Timer module now computes elapsed time to the resolution of a nano second. (4.4.5: July 3, 2018)
The Pred module now encapsulates system calls and/or compiler directives to ensure proper exact arithmetic for LINUX GNU compilers, Windows Visual C++ compilers and Intel compilers for both LINUX and Windows. (4.4.2: February 6, 2017)
The DataTable module function vsy_DataTableEvalGrad has been added to compute the function value and gradient. (4.4.2: August 16, 2016)
The Pred module function, vsy_PredExact has been added to query whether exact arithmetic is able to be performed. Pred is now able to control compiler/platform combinations interally to gaurantee exact arithmetic with Windows Visual Studio, LINUX gcc and Intel compilers. (4.3.1: July 23, 2014)
The VHashTable module has been added to store objects with a multiple integer key. (4.3.3: January 19, 2015)

The PTask module functions vsy_PTaskDef and vsy_PTaskInq have been added to replace function vsy_PTaskSetNumThreads. The argument list of vsy_PTaskExec has been changed (4.5.0: February 13, 2020)
The Concat module functions vsy_ConcatDef and vsy_ConcatInq now require a Vlong argument. (4.4.7: April 29, 2019)
The VFile module has been removed. (4.4.3: March 29, 2017)
The RegExp module for regular expression matching now uses POSIX functions on LINUX and regex functions on Windows. This functionality is only supported on Windows VS version 1800 or higher (4.4.2: January 16, 2017)
The PTask module has been redesigned. (4.4.0: March 30, 2016)