Sawtooth Software: The Survey Software of Choice

Common Mistakes

Make Sure Perl is Working

The best way to verify that Perl is working properly on your server is to use a test script named "". You can get "" by downloading the file.


Simply unzip the contents of the file and upload "" to the cgi-bin folder on your web server. Give "" proper execute permissions (755) and test it by browsing to it on your web site (i.e. The test is successful if you see "Debug Test #1 Successful" on your screen. If you get an error message, or if the code of the script is displayed on the screen, the test failed. Please contact your system administrator for help in running this simple Perl script.

The Perl files (*.pl) need to be uploaded to your web server in "Binary Mode". The two main Perl files are and Both of these files need "execute" permissions. Our Perl scripts need to know where the Perl.exe is installed on the web server. Sometimes this is called the "Path to the Perl Interpreter". This path could vary across web servers. You will need to find out from your hosting provider what their Perl path is.

The SSI Web license agreement specifies that our users are not allowed to modify our Perl scripts. However, you are allowed to modify the Path to the Perl.exe. This path can be found at the top of the Perl files and

Sawtooth Software

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Monday through Friday

Phone: +1 801 477 4700
Fax: +1 801 337 7410

We are open!

SKIM Software

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(GMT+2; GMT+1 Autumn/Winter)
Monday through Friday

Phone: +31 10 282 3500
Fax: +31 10 282 3560

We're open!

Lighthouse Studio

Lighthouse Studio is our flagship software for producing and analyzing online and offline surveys. It contains modules for general interviewing, choice-based conjoint, adaptive choice-based conjoint, adaptive choice analysis, choice-value analysis, and maxdiff exercises.

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Demonstrate CBC Using Only Basic Math

This survey will illustrate how Choice-Based Conjoint surveys work. It involves choosing food for dinner at a baseball game. You will take a quick 9-question CBC questionnaire, and then, using simple addition arithmetic, we will analyze your results and place the results into a "what-if" market simulator to see how your results stack up against others who have completed this survey.

Begin Demonstration