Problem

This article addresses the CAMWorks error “The selected post processor is invalid or license has expired” when attempting to assign a post to a machine. The user receives the error when assigning the post processor to a machine using Edit/Define Machine > Post Processor and browsing for the .CTL file.
 

This error can be caused by the incorrect post processor being selected, or the folder that the .CTL file resides in does not have the complete post processor file set. Using a custom post processor file that is restricted to another organization will trigger the error as well. 

Solution 1: Define Correct Machine

1. Go to Edit/Define Machine > Machine
2. Make sure the correct machine is active by highlighting the machine and clicking "Select". For example, if a post processor for a Turn machine was selected while a Mill machine is active, we will see this error.
3. Click "OK" to apply the change and then try to assign the Post Processor again

Solution 2: Check Post Processor Folder

If the first solution does not resolve the issue, check the folder in which your post processor is located. Aside from the .CTL file, we will need the .LNG and .PINF files that are usually provided and downloaded in the same folder. Acceptable post files are also .LIB and .KIN. Simply find or re-download the folder again and move all the files to your post processor folder. 

Custom-made post processors are linked to the license information used on the computer, as they are designed for a specific organization. If the organizations differ between the license file and the post processor, then the error will be triggered. Replace the selected post processor file with the one intended for your company. 

For additional support, existing customers can submit a ticket or new customers can contact Hawk Ridge Systems.