Users might find Run-time error 06 even just after installing the software.
This might happen because of improper regional settings, especially the language, and presence of few special characters in the username.
We would recommend you to review your regional inputs and set your language to American English, in case it is set to some other format.
If it still shows the error, then you might require to check whether full permission is provided to your folder location. If not, please provide full permission (read and write) to the project folder.
For that, go to the Folder where Hevacomp projects are kept.
Right click on the folder, open properties of it.
Go to security section, allow all permission to the folder; and click apply