Downloading and Installing Group Size Calculator

Note: I have migrated to Windows XP Pro, hence can no longer guarantee updates will work on older Windows platforms. There is nothing I know of that indicates that upgrades developed on W-XP won't work on W95/98, but I can no longer test upgrades on these older platforms. As such, I will keep a "legacy" copy of V1.11 that was built and tested on W95 available for download.

Download Now:

Windows 95, 98, NT, 2000	Windows XP, XP Pro, Vista, Windows 7
V1.11 Zip File (1.751 Mbytes) V1.11 Self extracting Zip (1.788 Mbytes) Auxiliary Files for W98 version	V2.4 Zip File (1.594 Mbytes) Self extracting Zip (1.656 Mbytes)

GSC is distributed as a zip file or as a self extracting zip. To download simply click on the zip download link (for W95/98) or on the self extracting zip (for W95/98) and save the file on your computer. Since the next steps will extract a number of files from the zip package, and after installation you will be able to remove these temporary files, it is recommended that you create a temporary directory to store the zip file in.

Unzip the file

If you download the self extracting zip, use either "Start...Run" or Windows explorer (double click on the file) to execute "gsc_xp.exe" (or "gsc_w98" for W95/98). This will unzip all the files into "C:\usr\install\temp\gsc".
Using WinZip, or some similar package, open "gsc.zip" and extract all the files into the temporary directory.

Using "Start" - "Run" from the Windows menu bar, browse to the temporary directory and select "setup.exe" (or using Windows Explorer, double click on the "setup.exe" filename).

The setup wizard will guide you through your installation. It is recommended that you accept the default locations suggested by the wizard, only because all combinations of other settings have not been verified.

"GSCalculator" will now appear in your Start-menu.

If you are downloading the W98 version some additional files need to be added. Download the auxiliary file, open it with WinZip (or other) and place all the cursor files into the program folder where "gscalculator.exe" is located (C:/Program Files/GSC/ if you used the default installation).

Give it a spin.

You may now remove your zip file and all the temporary files created in step 2 above.

A user's manual, an associated example file, and a target scanning backer are additional recommended files. It is suggested that you create a "C:\Targets" folder where you can download and save these files, along with future target images you will create as you actually use the program. The files are:

User's Manual (pdf format, html format)
Greyback.jpg (a gray background to place behind your targets when you scan them)
44_788.bmp (a sample scanned target used in the manual as an example)

Known Problems

Windows 7 (and perhaps Vista) security had issues with the registration file that GSC created / used. Unfortunately, the extension chosen "in the beginning" was ".reg", which is now defined exclusively as a registry file. To get around this problem, upgrade to V2.4 of GSC, which now uses a ".txt" extension to avoid running into security issues with Windows.
Occasionally during installation Windows reports an error that reads:
"C:\WINDOWS\System\msvcrt40.dll
An access violation occurred while copying the file"

This means that you already have the file on your system and it is currently in use by another application (perhaps the installation program itself). If you get this, simply click "Ignore" and the installation should continue and complete successfully.
Some users of Windows98 were getting a "Divide by zero" error when entering bullet hole locations. A previous attempt at fixing the problem was not effective. I've chased down the real culprit using a Windows98 system and it's now been fixed with versions V1.3.5 and later. If you have this problem, you will need to re-download the new version.

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