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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Anti-Spam Code: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by agniwilk[/i] [br]Origin Version 8 Operating System :win xP hello, i want to calculate sine transform of a function. Here is the code I use: #include <Origin.h> #include <fft_utils.h> void fft_sine_ex1() { Worksheet wks = Project.ActiveLayer(); Dataset dsData(wks, 1); Dataset dsFSine(wks, 2); if( dsData && dsFSine ) { vector vec; vec = dsData; int nSize = vec.GetSize(); int iRet = fft_sine(nSize, vec); if(0 != iRet ) { printf("Forward FFT returned error: %d\n", iRet ); return; } dsFSine = vec; } } Compilation can be done,then while linking the following error message appear: Linking... C:\Program Files\OriginLab\Origin8\OriginC\Originlab\WKBOOKSPLITTER.C(1532) :Error, Function get_and_check_range@JIAAAAAAOGAAAAAALBAAAAAA was called, but its body could not be located during linking. Linking Failed! So i guess i must be doing some very basic error (i am doing that for the first time). Will be grateful for hints, ana [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.