A number of our students selected the wrong tool when creating their CAM program. When they now select the new tools in each operation the tool changes will not update. This means that we have been unable to create the G-code for machining their parts. The program looks like this in the Activities Process View

Here is the error we get when trying to simulate

Scenario: (steps to reproduce) : 1) Generate a simple CAM program. This should include several machining operations. 2) When generating a CAM program, select an incorrect tool and save the operation 3) Redefine the tool to the correct on in the operation 4) Try to simulate the program (select Tool Changes and Operations holding Shift) 

Actual Result : The software creates an error (PFA the screenshot of the error) and does not allow to generate the G-code. 

Expected Result : No errors, the G-code generated