[vtk-developers] RE: unable to load packages

[Volpe, Christopher R (Research)]

Hi folks-
  Problem solved. It was a windows limitation on the environment variable size. In Windows NT/2K, you
have a system variable called "Path" and a user variable called "path" (note differing
capitalization). Normally, the system concatenates "path" to the end of "Path", and the result
becomes the value of %PATH% seen by applications, such as cmd.exe (MS DOS prompt). Unfortunately, if
you exceed a memory limitation on the environment size, Windows silently chooses not to perform this
concatenation. This is what happened to me, resulting in wish.exe not being able to locate the vtk
libraries, whose location was specified by the user "path" variable. 
  The fix for this is to follow the instructions given in Mocrosoft Knowledge Base article Q158141,
which I reproduce below:

In Windows 2000: 
	In Control Panel , double-click System . 
	
	Click the Advanced tab, click Environment Variables . In the System variables , click ComSpec
. 
	
	To increase the amount of environment space, use the following syntax: 
	
	ComSpec = <drive:\windir>\system32\cmd.exe /e:2048 
	
	where <drive:\windir> is the drive and folder where the Windows 2000 system files are
located. 
	
The maximum size for the /E: switch is 32768 bytes. 

-Chris

>  -----Original Message-----
> From: 	Volpe, Christopher R (Research)  
> Sent:	Friday, July 05, 2002 1:40 PM
> To:	Vtkdevelop (E-mail)
> Subject:	unable to load packages
> 
> Recently, with no apparent changes other than a cvs update 
> and subsequent build, I get the following when I try to load 
> vtk into a wish console:
> 
> % package require vtk
> ::vtk::load_component: vtkCommonTCL could not be found.
> can't find package vtkcommon
> 
> Env vars still look fine. Has there been some kind of 
> wrapping script change lately that's possibly interfering 
> with the package load process?
>  
> thanks very much in advance,
> 
> Chris
> GE Global Research Center 
> ______________________________________________________________
> ______________________________________________________________
> ______________________
> 
> Dr. Christopher R. Volpe, Ph.D.
> Computer Scientist
> Visualization and Computer Vision Lab 
> Imaging Technologies
> Bldg KW, Room C215
> P.O. Box 8, Schenectady, NY 12301
> 
> (518) 387-7766, Dial Comm: 8*833-7766, Fax: (518) 387-6981
> e-mail: volpecr at research.ge.com    web: http://www.crd.ge.com/~volpecr
> 
> 
> 
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