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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 Garchinski[/i] [br]Origin Ver. and Service Release (Select Help-->About Origin): 8.5 Operating System: Win 7 Hello, I try to do a nonlinear fit using SineSqr My code looks like this: fname$= "C:\data\Scan.dat"; newbook; impasc; string bkname$=%H; int col_num = wks.ncols; range wksObject = [bkname$]1!; for (ii=3; ii<= col_num; ii++) { wksObject.addcol(); string strData$ = %(wksObject.ncols); range fitx=1, fity=3; plotxy iy:= [bkname$]1!wcol(ii) ogl:=!1 color:=ii plot:=200; nlbegin iy:= [bkname$]1!wcol(ii) func:=SineSqr nltree:=tt; nlfit; fity=fit(fitx); nlend; } During the first run this code returns the following error message: general operation failure Internal error code: -898, -28673 As I am totally new to LabView Scripting, I have no clue what the cause might be. (And what exactly "fity=fit(fitx);" is needed for, I took this part from an example code). Does anybody see what bug(s) could cause the error message? Thanks for your help! Garchinski [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.