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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 jknicely[/i] [br]Origin 2015. Windows 8.1. Microsoft Excel 2010. I have to transfer large amounts of data from Excel files to Origin and then create plots of the data. I do this by copy/pasting from Excel into an Origin workbook. I need to do this several times a day for my work. I have found that for some of the large data sets, this causes Origin (and sometimes Excel) to freeze for long periods of time (as long as 2 hours, though usually around 30 min). The block of data is typically 30000 rows and 20 to 40 columns. While copying, I've found Origin uses over a gigabit of RAM and maxes out my Disk. I've noticed it's less of a problem immediately after restarting my computer. This would lead me to believe RAM is an issue, but my computer has 4 gigs of it. Why does this happen? Are there any ways to speed up this process? Would importing the Excel file be better? [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.