Loading nrnmech.dll crashes with "Signal 11" error

[maddy]

Hi all,i currently installed neuron5.9 on my windowsXp machine.But when i try to start it by clicking nrngui in start menu i saw following message on a white window with heading SH

NEURON -- Release 5.9.10 (1601) 2006-11-01
by John W. Moore, Michael Hines, and Ted Carnevale
Duke and Yale University -- Copyright 1984-2006

loading membrane mechanisms from nrnmech.dll
Signal 11

NEURON exited abnormally. Press the return key to close this window




This window closes as i press enter.Please help me where am i wrong?I have tried reinstalling it.How can i reach oc>....
Regards,
MADHUR

[ted]

How did you install it (i.e. just started its installer and accepted all defaults, or did you do
something else?), and where did you install it to (did you let it install into its default location,
or did you put it somewhere else?).
Before installing NEURON, did you already have cygwin installed on your PC?

[maddy]

I tried rereinstalling Neuron5.9 with all defaults(uninstall previous instance ) but it didn't owrk.Then i uninstall it,installed cygwin2.510.2.2, then again installed neuron, but got same bore message-

NEURON -- Release 5.9.10 (1601) 2006-11-01
by John W. Moore, Michael Hines, and Ted Carnevale
Duke and Yale University -- Copyright 1984-2006

loading membrane mechanisms from nrnmech.dll
Signal 11

NEURON exited abnormally. Press the return key to close this window




In documentations it is writtern that neuron do not accept space in paths for eg.C:/documents and settings,therefore i previously put the desktop folder in c:/neuron 5.9.....

When i click nrngui,following happens
1.There is a black window with heading nrngui
2.There is another black window with heading rxvt00000cec
3.Then comes the SH white window with above message,first two steps takes place in a flash....

How did you install it (i.e. just started its installer and accepted all defaults, or did you do
something else?), and where did you install it to (did you let it install into its default location,
or did you put it somewhere else?).
Before installing NEURON, did you already have cygwin installed on your PC?

[maddy]

Hi all,i am relaxed now.Sorry if i was wrong in describing it but i found this way(which was not working ofcourse) to start at http://www.anc.ed.ac.uk/school/neuron/t ... /tutA.html
which says mswin users click nrnui from start menu...

A different tutorial at http://www.kem.org/neuron/prog1.html tells that windows user should start with writing nrniv somewhere,where it doesn't tell
anyway i figured it out to be rxvt sh shortcut, where i can enter nrniv to start up which brings me to oc>.

Thanks a lot for al who worried with me,but i still cant figure out that whose fault was this!!!Anyway beginners like me try both methods if u are unlucky as me to stuck on very first step.....

[hines]

Since you got this by clicking on the nrngui icon

loading membrane mechanisms from nrnmech.dll
Signal 11

NEURON exited abnormally.

and the icon makes NEURON start in c:\ then I suspect you have incompatible (left over from an earlier version) c:\nrnmech.dll file. Try removing the nrnmech.dll file (its a bad place to have simulation files--- better places are in simulation project specific subdirectories) and see if the icon launches properly.

[maddy]

Thank you,you were exact in spotting the problem,now i can see the GUI.

[mflynn]

I'm trying to get my model running on a colleague's machine. We downloaded the most recent version of NEURON, compiled the mod files and it crashes and dumps the stack. We can't even run files from an autolaunch model in the ModelDB, we get a 'signal 11' error. We tried uninstalling and reinstalling NEURON, tried installing cygwin, but nothing worked. Any ideas as to what could be the problem?

Mark

[hines]

If neurondemo is not working then try installing
http://www.neuron.yale.edu/ftp/neuron/v ... -setup.exe
My old way of dynamically loading dll files has worked since dos and windows3.1 but in the past 3 months you are the third person to experience this problem which I have not been able to reproduce on my machine. This new version uses an entirely different method to create and load the nrnmech.dll file and makes a nrnmech.dll which is incompatible with the old ones. So, if neurondemo works on your machine, be sure to remove all the .o files in a directory before starting the mknrndll process so that you do a clean build of the nrnmech.dll file(s).