Downloading and Installing the Trajectory Plot Program

Trajectory plot is distributed as a zip file or as a self extracting zip.

I have recently upgraded to Windows XP for development of this program. I have seen some problems trying to run earlier versions of Trajectory Plot (V2.4 and earlier) on W2000 machines and later. All future upgrades will only be to the XP platform - I do not know if these updates will work on the older platforms. As such, I will keep a copy of Trajectory Plot V2.4 that was built on and for the Windows 95/98 platform and make it available through this website.

Download Now:

• To install the zip file:
  • click on the .zip download link ( 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.
  • Using WinZip, or some similar package, extract all the files into the temporary directory
• To use the self extracting zip:
  • click on the .exe download link ( for W95/98) and save the file on your computer to a temporary directory.
  • Using "Start" - "Run" from the Windows Start menu, browse to the temporary directory and select "Trajectory_xp.exe" ("Trajectory_w95" for W95/98). This will automatically create and expand all the files into the temporary directory "C:\usr\install\temp\Trajectory".
• 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.
• "Trajectory" will now appear in your Start-menu.
• Give it a spin.
• You may now remove your zip file and all the temporary files created in step 2 above.

Version 2.2 and 2.3 fix a few bugs associated with window placement.

Version 2.5 is 2.4 simply rebuilt on the Windows XP Pro platform.

Version 2.6 is a rebuild for Windows 7. In particular, the program creates a file to remember registered user information. In previous versions this file had a ".reg" suffix. Windows 7 now views all such files a registry files and limits access to such. This version changes the file to a ".txt" file to avoid Windows 7 issues.

Known Problems

• Version 2.4 (and earlier) were built and intended for W95/98 machines. These versions were known to not run properly on W2000 boxes. Version 2.5 (and later) are built on Windows XP. It is not known if these will run on older machines as well.
• 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.
• Windows 7 treats all files with the ".reg" suffix as registry files and controls access to these. Versions earlier than 2.6 used ".reg" as a registration file. This had to be changed to a ".txt" file to run under Windows 7.