[R] Function storing error messages in 32 bit R-2.15.2 version

[Uwe Ligges]

I think we need the data in order to see if this is a bug or "just" some 
numerical issue.

Uwe Ligges



On 21.11.2012 07:14, Maulik Shah wrote:
> I am using 32 bit R - 2.15.2 version and working on package ltm. The
> program does not give me any warning message when I run tpm command for a
> dataset. If run tpm command for the same dataset in 64-bit R 2.15.1
> version, I get the warning message shown below.
>
> Can someone suggest why is no warning message being generated by 32-bit R?
> Or is it being generated but not getting printed? Which function will have
> this warning message stored?
>
> *Consider the following code that I ran on 64-bit R - *
>
> This is package 'ltm' version '0.9-7'
>
>> resp<-read.table("D:\\DriveE\\IRT\\Outfiles\\testFile.txt")
>> params<-tpm(resp)
> Warning message:
> *In tpm(resp) :*
> *  Hessian matrix at convergence contains infinite or missing values;
> unstable solution.*
>
> *Consider the following code that I ran on 32-bit R - *
>
>> resp<-read.table("D:\\DriveE\\IRT\\Outfiles\\testFile.txt")
>> params<-tpm(resp)
>> warnings()
> NULL
>
> Thanks and regards,
> Maulik Shah
>
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