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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 billyrainbow[/i] [br]Origin Version (Select Help-->About Origin): 7.0303 Operating System: Windows 2000 Hello, I wrote a little programm in Origin C to import data from a textfile (no CSV!). I would like to add as first column a row for dates in string format, but when i execute the loop if (i==6) { string y = row.GetToken(0,' '); string m = row.GetToken(1,' '); string d = row.GetToken(2,' '); string date; date.Format("%s.%s%s",d,m,y); for (u=0; u<120; u++) { dsDate[u] = date; // ERROR (-->Dataset dsDate !!) } } the error message "Run-Time Error in Origin C funktion, unknown error" occurs. Is it possible, that Datasets don't accept strings? If this is the Problem, does anyone know an alterative method to add values to columns without Datasets? I know that it works manually, but i really would like to have it made in a loop... Thank you in advance, Marion. Edited by - billyrainbow on 09/19/2007 04:09:39 AM [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.