# Bug in screentest for Win **URL:** \ **Category:** Uncategorized\ **Created:** [March 8, 2004, 5:26pm UTC](https://psychtoolbox.discourse.group/t/bug-in-screentest-for-win/845 "2004-03-08T17:26:52Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Allen\_Ingling](https://avatars.discourse-cdn.com/v4/letter/a/a183cd/32.png) [@Allen\_Ingling](https://psychtoolbox.discourse.group/u/Allen_Ingling)\ **Post date:** [March 8, 2004, 5:26pm UTC](https://psychtoolbox.discourse.group/t/bug-in-screentest-for-win/845/1 "2004-03-08T17:26:52Z")
Bug report: I am running the PsychToolbox version 2.54 in Windows XP, under Matlab 6.5, using two video cards. When I try to run screentest I get a window announcing a debug error in Screen.dll ("Run-Time Check Failure #3 - The varaible 'accIndex' is being used without being defined"). The options Abort/Retry/Ignore all lead to failure. Cheers -Matteo Matteo Carandini, PhD www.ski.org/carandini Smith-Kettlewell Eye Research Institute 2318 Fillmore St, San Francisco, CA 94115 +1 415 345 2129 / 8455 (FAX) ---
**Author:** ![ingling7](https://avatars.discourse-cdn.com/v4/letter/i/e79b87/32.png) [@ingling7](https://psychtoolbox.discourse.group/u/ingling7)\ **Post date:** [March 15, 2004, 9:06am UTC](https://psychtoolbox.discourse.group/t/bug-in-screentest-for-win/845/2 "2004-03-15T09:06:18Z")
Dear Matteo, Both you and someone who's name I do not recognize from the email address, [merriamep@...](mailto:merriamep@...), reported bugs in the Win 2.54 Psychtoolbox. I'd planned to fix three of those this weekend, Saturday. I am sure I have fixed the WaitSecs bug. I am also pretty sure that I fixed the bug causing the error message about "accIndex" . I could not reproduce the bug here, but I have repaired what looked to be the problem in the source. That bug had to do with how Screen 'PixeSizes' probed the available pixel sizes. Because the values returned depend on the video board, it looked like that the bug would register with some cards (yours) and not others (mine). The last bug, the problem with reporting the directX version as 0.0, remains and I am bumping that back to next weekend. You can get the new versions of Screen and WaitSecs from here: [http://cns.nyu.edu/%7Eingling/Win\_toolbox/](http://cns.nyu.edu/%7Eingling/Win_toolbox/) There is also a new test included, WaitSecsTest, which checks for that WaitSecs bug. best, Allen > On Mar 8, 2004, at 12:26 PM, Matteo Carandini wrote: > > \> > \> Bug report: > \> > \> I am running the PsychToolbox version 2.54 in Windows XP, under Matlab > \> 6.5, > \> using two video cards. When I try to run screentest I get a window > \> announcing a debug error in Screen.dll ("Run-Time Check Failure #3 - > \> The > \> varaible 'accIndex' is being used without being defined"). The options > \> Abort/Retry/Ignore all lead to failure. > \> > \> Cheers > \> > \> -Matteo > \> > \> Matteo Carandini, PhD > \> www.ski.org/carandini > \> Smith-Kettlewell Eye Research Institute > \> 2318 Fillmore St, San Francisco, CA 94115 > \> +1 415 345 2129 / 8455 (FAX) > \> > \> > > From: [merriamep@...](mailto:merriamep@...) > Subject: [psychtoolbox] Win ver 2.54: WaitSecs and non-integers > Date: March 8, 2004 2:39:37 PM EST > To: [psychtoolbox@yahoogroups.com](mailto:psychtoolbox@yahoogroups.com) > Reply-To: [psychtoolbox@yahoogroups.com](mailto:psychtoolbox@yahoogroups.com) > > \> Hi Allen et al., > \> > \> I've just downloaded the new Win PT (ver 2.54) and there seems to be a > \> bug in WaitSecs. It doesn't seem to work for non-integer values: > \> > \> %% testing integer value > \> a = getsecs; > \> waitsecs(1.0); > \> b = getsecs; > \> time = b-a > \> time = 1.0032 > \> > \> %% testing non-integer value > \> a = getsecs; > \> waitsecs(1.9); > \> b = getsecs; > \> time = b-a > \> time = 0.0032 > \> > \> Note that this works fine using PT ver 2.50 on my computer (Win XP, > \> Matlab 6.5.1): > \> > \> %% testing integer value > \> a = getsecs; > \> waitsecs(1.0); > \> b = getsecs; > \> time = b-a > \> time = 1.0112 > \> > \> > \> %% testing non-integer value > \> a = getsecs; > \> waitsecs(1.9); > \> b = getsecs; > \> time = b-a > \> time = 1.9040 > \> > \>