If you are not running the latest version, we strongly suggest you download and install it to see 

if the problem goes away. 


Important! All versions earlier than 2.0.0.5 has expired and will no longer start. 


Important note to Windows 7 users
There is an issue with older Windows versions together with the .NET Framework 4 causing the simulator to show an error message at start and then closing. This issue can be solved by simply downloading and installing the .NET Framwork 4.5 on the PC. If you are having this issue, please follow the link below to update your .NET Framework version to 4.5.


Make sure you have the right requirements to run the program.


The problem could also be caused by a corrupt setting, try this: 

Double-click the CNCSimulator Pro icon and then quickly hold down the left ALT key on the keyboard. 


Keep holding the ALT key down, after a few seconds, a small window will show. 

Click the topmost button that says: "Reset program settings (incl. tools, workpieces etc)" 


Be aware that this will completely reset all settings in the program and you will loose custom tools, 

workpieces and other things. Now, try to restart the program again. 


If the simulator does not start at all and there are no error messages, try this:

On some computers with AVG Antivirus installed, the simulator gets blocked at start due to a bug

in AVG. This will hopefully soon be fixed but in the meantime, you can get around it by temporarily 

disable AVG. Right click on the AVG icon in the task bar notification area and select "Temporarily

disable AVG protection". Now, try to start the simulator again.



You can read about this problem at AVG support.

https://support.avg.com/answers?id=906b00000008nOAAAY


Adding an exception as the AVG user did also solve this problem.

We expect AVG to solve this problem quickly.


If this did not solve the problem, also see this article.


If the problem persists, go to the installation folder of the CNCSimulator Pro and see if there are any 

*.txt files there. For example "startupexception.txt" or "scripterrors.txt". If so, email these files to support 

and we will try to solve the problem. 


Remember to add as much information as you can. We need to know your Windows version, computer 

configuration, CNCSimulator Pro version, when the problem started etc. Add screenshots if needed.