TO be honest I am not sure what a thread is or how it could be causing a problem. Dispite my ignorance I went to the documentation and found this:

Win32::OLE->Initialize(COINIT)
The Initialize() class method can be used to specify an alternative apartment model for the Perl thread. It must be called before the first OLE object is created. If the Win32::OLE::Const module is used then the call to the Initialize() method must be made from a BEGIN block before the first use statement for the Win32::OLE::Const module.

Valid values for COINIT are:

Win32::OLE::COINIT_APARTMENTTHREADED - single threaded
Win32::OLE::COINIT_MULTITHREADED - the default
Win32::OLE::COINIT_OLEINITIALIZE - single threaded, additional OLE stuff

COINIT_OLEINITIALIZE is sometimes needed when an OLE object uses additional OLE compound document technologies not available from the normal COM subsystem (for example MAPI.Session seems to require it). Both COINIT_OLEINITIALIZE and COINIT_APARTMENTTHREADED create a hidden top level window and a message queue for the Perl process. This may create problems with other application, because Perl normally doesn't process its message queue. This means programs using synchronous communication between applications (such as DDE initiation), may hang until Perl makes another OLE method call/property access or terminates. This applies to InstallShield setups and many things started to shell associations. Please try to utilize the Win32::OLE->SpinMessageLoop and Win32::OLE->Uninitialize methods if you can not use the default COINIT_MULTITHREADED model.

So I tried to clear the problem up with the following code:

#!/usr/ym/util/perl
use Win32::OLE; 

#Perl "C:/documents and settings/aaron.verellen/desktop/trial2.pl"

Win32::OLE->Initialize(COINIT_OLEINITIALIZE);
Win32::OLE->Option(Warn => 2);

#use existing instance if mathcad is already running
eval {$MC = Win32::OLE->GetActiveObject('Mathcad.Application')};
die "Mathcad not installed" if $@;
unless (defined $MC)
{
    $MC = Win32::OLE->new('Mathcad.Application', sub{$_[0]->Quit;})
    or die "Unable to start Mathcad";
}

#Open specific worksheet
my $filePath = 'C:\Documents and Settings\aaron.verellen\Desktop\testM
+12.xmcd';
my $WS = $MC->Worksheets;
my $S = $WS->Open($filePath);


#Set values on the worksheet
$S->setValue('x',50);
$S->setValue('y',60);
$S->setValue('z',70);
    
$S->Recalculate;

my $test = $S->getValue('x');
print "test = $test\n";

my $answer1 = $S->getValue('output1');
my $answer2 = $S->getValue('output2');

print "($answer1,$answer2)\n";
[download]

Thanks,
Aaron

Ok, so what your telling me is that the getvalue method does not work because of something to do with threads.
Thats my guess. You need to examine $^E or Win32::OLE->LastError() for a better error message.

My ignorance seems to be hindering me. I looked over the Win32::OLE->LastError and implimented the following:

#!/usr/ym/util/perl
use Win32::OLE; 

#Perl "C:/documents and settings/aaron.verellen/desktop/trial2.pl"

#Win32::OLE->Initialize(COINIT_OLEINITIALIZE);
Win32::OLE->Option(Warn => 2);

#use existing instance if mathcad is already running
eval {$MC = Win32::OLE->GetActiveObject('Mathcad.Application')};
die "Mathcad not installed" if $@;
unless (defined $MC)
{
    $MC = Win32::OLE->new('Mathcad.Application', sub{$_[0]->Quit;})
    or die "Unable to start Mathcad";
}

#Open specific worksheet
my $filePath = 'C:\Documents and Settings\aaron.verellen\Desktop\testM
+12.xmcd';
my $WS = $MC->Worksheets;
my $S = $WS->Open($filePath);


#Set values on the worksheet
$S->setValue('x',50);
$S->setValue('y',60);
$S->setValue('z',70);
    
$S->Recalculate;

my $test = $S->getValue('x');
my $err = Win32::OLE::LastError();
print "*$err\n";
print "test = $test\n";

my $answer1 = $S->getValue('output1');
my $answer2 = $S->getValue('output2');

print "($answer1,$answer2)\n";
[download]

When I run the above script I get:

C:\>Perl "C:/documents and settings/aaron.verellen/desktop/trial2.pl"
Win32::OLE(0.1709) error 0xc00000fd
in METHOD/PROPERTYGET "getValue" at C:/documents and settings/aaron.verellen /desktop/trial2.pl line 31
*Win32::OLE(0.1709) error 0xc00000fd
in METHOD/PROPERTYGET "getValue"
test =

The information gleamed off the lasterror technique appears to be the same as the error message recieved before. My first though is I didn't impliment it correctly. Would you please take the time and correct my ignorance Anonymous Monk so that whatever clues you seek I can give you?

Thank you so much for everything you have done thus far,
Aaron