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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Hi,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>One thing to add to what has already been said: are we talking about error: overflow, or error: buffer overflow? <o:p></o:p></span></p><div style='mso-element:para-border-div;border:none;border-bottom:solid windowtext 1.0pt;padding:0cm 0cm 1.0pt 0cm'><p class=MsoNormal style='border:none;padding:0cm'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>The former is generally really simply helped, it tends to be caused by a variable defined as integer but then getting a long number assigned to it, for instance:<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Dim a As Variant<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Dim i As Integer<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>i = -32768<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>a = Abs(i) 'Result is a Long.<o:p></o:p></span></p><div style='mso-element:para-border-div;border:none;border-bottom:solid windowtext 1.0pt;padding:0cm 0cm 1.0pt 0cm'><p class=MsoNormal style='border:none;padding:0cm'><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>i = Abs(i) 'Overflow!<o:p></o:p></span></p></div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>(from ebasic help)<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>That is, an integer can only have values assigned to it between -32768 and (+)32767, thus assigning Abs(-32768) [results in +32768) causes an overflow. This would explain your scenario as follows: you have, for instance, a cumulative reaction time (or the sum of RTs), which sooner (if participants are really slow) or later (if they aren’t) causes the overflow by reaching higher than 32767. Personally, I often get this because I define a variable as integer and do constant clock.read (which gets the time in ms from the onset of the experiment). This causes an overflow after less than a minute. Anyway, the error can usually be solved by defining the variable as long (or variant, but a curse rests on such ill-defined types) instead of integer.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>The latter (buffer overflow) is presumably associated with your neuroscan setup, which, I would expect, uses serial port communication. I would have predicted that something like ‘flushoutputbuffer’ might have helped you, but, according to the help file:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>“This function is reserved for future use. Serial output communications are synchronous. Data is always flushed from the output buffer after write operations are called.”<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Did the future come with E-Prime 2? Are you using E-Prime 2?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Best,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>Mich<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#16355A'>Michiel Spapé<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#16355A'>Research Fellow<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#16355A'>Perception & Action group<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#16355A'>University of Nottingham<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#16355A'>School of Psychology<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#16355A'>www.cognitology.eu</span></i><i><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#16355A'><o:p></o:p></span></i></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p> </o:p></span></p><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> e-prime@googlegroups.com [mailto:e-prime@googlegroups.com] <b>On Behalf Of </b>ben robinson<br><b>Sent:</b> 30 November 2010 20:20<br><b>To:</b> e-prime@googlegroups.com<br><b>Subject:</b> Re: Neuroscan/E-Prime Buffer<o:p></o:p></span></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>which program is giving you the "Buffer Overflow" error, eprime or neuroscan? if eprime, does eprime crash when the error occurs? can you see where you were in the script when i crashes, and does it always crash at the same place in the script?<o:p></o:p></p><div><p class=MsoNormal>On Tue, Nov 30, 2010 at 11:50 AM, Jessica Miller <<a href="mailto:jess.cogneuro@gmail.com">jess.cogneuro@gmail.com</a>> wrote:<o:p></o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Hello!<br><br>We have Neuroscan 4.5 collecting ERP data while E-Prime presents the<br>experiment to participants. Recently we have been getting a "Buffer<br>Overflow" error message as soon as 15 minutes into an experiment and<br>as late as 1 hour 20 minutes. I am wondering if anyone else has had<br>this problem and if it is a problem with the data being sent from E-<br>Prime to Neuroscan, or if it is another problem. Both computers that<br>we use meet all requirements for both software packages, and were<br>fully upgraded (RAM, video memory, etc) in the last month.<br><br>Any suggestions would be much appreciated.<br><span style='color:#888888'><br>--<br>You received this message because you are subscribed to the Google Groups "E-Prime" group.<br>To post to this group, send email to <a href="mailto:e-prime@googlegroups.com">e-prime@googlegroups.com</a>.<br>To unsubscribe from this group, send email to <a href="mailto:e-prime%2Bunsubscribe@googlegroups.com">e-prime+unsubscribe@googlegroups.com</a>.<br>For more options, visit this group at <a href="http://groups.google.com/group/e-prime?hl=en" target="_blank">http://groups.google.com/group/e-prime?hl=en</a>.</span><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>-- <br>You received this message because you are subscribed to the Google Groups "E-Prime" group.<br>To post to this group, send email to e-prime@googlegroups.com.<br>To unsubscribe from this group, send email to e-prime+unsubscribe@googlegroups.com.<br>For more options, visit this group at http://groups.google.com/group/e-prime?hl=en.<o:p></o:p></p></div><br/>
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