Hi René,
Our document is always applicable to the latest version of Origin.
In Origin 2016, the syntax is:
int ocmath_reducexy_fixing_increbin(const double *px, const double *pData, const UINT nSize, const double nStart, const double nEnd, const int iOption, double *pMerged, double dInc)
You can check this in:
<Origin EXE Folder>\OriginLab\Origin2016\Origin C\system\ocmath.h
Regards,
Yuki
OriginLab