Frequently asked questions

Does the software price include tax?

Yes, the price includes all appropriate taxes.

How is the software delivered?

The software is only available for download and must be activated on an internet connected computer on first use.

Why can't I run the software in a Virtual Machine?

We are unable to support running the software in a virtual machine as this could in theory be used to bypass the licencing.

How to restore the ability to view help files after upgrading Windows to a more recent version.

Please note, this is now fixed in the most recent version of the software. This note applies to older version (pre version 10.0). After upgrading or installing a new version of Windows you may find the ability to view local Help Files has been removed by Microsoft as part of the upgrade process. This affects a lot of software that uses the standard HLP format (including CPO). However, this functionality can be restored quite easily by following the numbered steps below.

Steps to re-enable viewing of help files

  1. Download the zip file containing help file and installation script here.
  2. Locate the file you have downloaded (named help.zip) and unzip it.
  3. Where you have unzipped the files, find the Install.cmd file and right click it. From the popup menu, select 'Run as administrator'.
  4. You should now see the results of the installation with a prompt to press a key to finish. You can now view help files normally again.
These scripts were originally created by Komeil Bahmanpour and modified to handle Windows 10 using advice gleaned from Alan Copp.

I appear to have an old version of salflibc.dll, the run-time library file?

Search for all versions of salflibc.dll on your disk drives and delete them, then copy the latest version to your working cpo directory.

The latest version can be downloaded as a zip file here.

How is software licencing handled?

Previous versions of the software used hardware based dongles to ensure compliance with licencing. New versions now use internet based software licencing and require an active connection to the internet for installation.

How do I upgrade to a newer version from the hardware based copy protection?

If you wish to benefit from the lower cost upgrade licencing then you will need to return your original hardware dongle. If you do not wish to do so, then a new licence will have to be purchased at full value.

Problems with CPO3D graphics or with crashing at startup

The software has been tested on the most recent version of Windows so if possible, please try the newest version of Windows and ensure Windows Update has installed all pending updates.

It may be that the OpenGL version on your computer is out of date. As this is shipped with Windows it is not easy to update separately.

In this situation, please try setting the Compatibility Mode. If this fails to work contact CPO.

Problems with calling data files

If a CPO program crashes when you try to open a data file 2 possible causes are:

  1. You are running cpo2d and want to call test2d1.dat, say, but are attempting to call it from the folder c:\cpo\3d_data instead of c:\cpo\2d_data, or vice-versa.
  2. The file name has a space in it somewhere, such as c:\cpo\my file.dat, or c:\program files\name.dat.

Unfortunately we cannot create clean exits for these because they are outside our control.

Help for new users

The easiest form of help is in the online /Help/index/step by step help/. Here is a copy of part of it.

Start by reducing the size of that Help page and putting it where it can be seen while you run the program.

Click on File and then on Open for running only.

Double click on 2d_data (assuming you are using cpo2d) and then on test2d01.dat.

After the messages click on Run, watch the program run, then click on OK.

Click on Zoom or Contours or View, and in each case experiment with all the options.

Click on Close.

Now experiment with changing some of the parameters of the model:

Click on File and then on Open data builder file.

Double click on /2d_data/test2d01.dat.

Click on File and then on SaveAs (data builder file).

Enter a name of your choice and then save.

Click on Databuilder and experiment with the options, running the program to see the effect of the changes.

Finally click on Close data builder, then Exit.