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Trades Math Calculator has been discontinued.

Try Machinist's Calculator as an alternative.

To get support for Trades Math Calculator you MUST include your order number with the query.


Error Messages and Frequently Asked Questions
x Although our goal is to make the Trades Math Calculator on-line help as clear and comprehensive as possible, we realize that there will always be questions. This page contains explanations some commonly asked questions. We have a form that makes it easy to ask.

When I try to download I get this message: "TradesMathCalc-demo.exe is not commonly downloaded and could harm your computer".
I get a "run-time error, file missing or invalid" message when using Trades Math Calculator.
I get a "Run-time error 75: path/file access error" message when using the Materials List.
I get an "Error reading setup initilzation file"" message when trying to install the Trades Math Calculator.
Can I run the software on more than one computer?
What happens if I format the HD in the future, or if I install the software on a new PC? Do I need another code?
Does any of your software run on a PDA (Palm handheld)?
I get "Error 112" when I try to install a demo.
I get "missing file: INSTMSIA.EXE" when I try to install a demo.
Can I install your demo on a computer that is not connected to the internet?
What, and where are the MID and Site codes we need to send to get an activation code?

When I try to download I get this message: "TradesMathCalc-demo.exe is not commonly downloaded and could harm your computer". What is the explanation for this, and how do I download the program?
You have downloaded an older version of Trades Math Calculator. Download the latest version from our website (click "Demo" in the navigation menu above). All of our software is now signed by Symantec-VeriSign for your protection.

I am getting a Run-time error'339' mscomet2.ocx a file is missing or invalid., Can you help or should I just unload the program? Maybe it did not take for some reason.
The Windows operating system has a large library of .dll, .ocx, etc. files that must be present to run most software, including ours.
Sometimes one of these files is missing (just like socks in the dryer). We include some in our install sets, but can't include them all.
Click here for fixing instructions.

I get an "Error reading setup initilzation file"" message when trying to install the Trades Math Calculator.
This error is usually the result of an unsuccessful download. Sometimes an installer package will have appeared to have downloaded successfully, because no error message was given about the download; however, you will not always receive an error message when the entire file was not downloaded successfully. When you run the exe file, it has enough information available to start running, but it will only get far enough to provide the error message shown above. Since it does not have the complete file content, it will not be able to read the setup inititializaton file.
You need to download the file again.

Can I use the software on more than one computer? I am the only user, one at home and one for work
Each seat of our software is licenced to one computer only. We have put a low price on the software so that it would be reasonable to pay per computer.

What happens if I format the HD in the future, or if I install the software on a new PC? Do I need another code?
According to the End User Licence Agreement you must uninstall a licenced copy before installing and registering a licenced copy onto another computer.

Does any of your software run on a PDA (Palm handheld)?
We do not currently have a version of Trades Math Calculculator for PDAs.

I have downloaded the demo but when I try to install it, I ancounter an error. The error is:
"Setup is unable to decompress and copy all of the program filesneeded to proceed with the installation. Contact your software vendor ERROR 112". What is the problem?

The most probable cause to this problem can be found on the Microsoft web site at
http://support.microsoft.com/default.aspx?scid=kb;en-us;326678

I have been trying to install a demo for the free trial. I get a box INSTALLSHIELD saying "...instmsia.exe not found"
The version of Microsoft's Installer on your PC is out of date. Please use one of the Resources below to download and install the MSI version that is appropriate for your PC.
Instmsia.exe for Windows 98 or Windows Millennium Edition: http://download.microsoft.com/download/WindowsInstaller/Install/2.0/W9XMe/EN-US/InstMsiA.exe
-or-
Instmsiw.exe for Windows NT, Windows 2000 or Windows XP: http://download.microsoft.com/download/WindowsInstaller/Install/2.0/NT45/EN-US/InstMsiW.exe

Can I install your demos on a computer that is not connected to the internet?
You'll need access to an online computer that has a CD-rom writer or ubs port. Go to the download page;
http://www.tradesmathcalculator.com/download.html
When you click the "Download" link you'll be given a choice to Run or Save. Choose "Save", and save it to your desktop or the folder where you usually save your downloads.
Locate the file you've just saved and copy it to a writable CD-rom or flash drive.
Place the CD or flash drive into your offline computer, open Windows Explorer to the CD drive and double-click on the demo exe filename. Follow the directions that appear to install the demo.

I get a Runtime 75 error
Sometimes Windows will restrict access to certain files that are needed to run programs.
Click this link for fixing instructions

What, and where are the MID and Site codes we need to send to get an activation code?
We have discontinued the necessity for MID and Site code activation of demos. Now when you purchase a licence you will be immediately given a link to your permament version of Trades Math Calculator along with the serial number to activate it.