When you edit, split, delete or reshape an operation in the Program stage, CAM Assist checks the change can be machined. If it can't, the button is disabled with a tooltip, a short message appears at the bottom of the window, or an An error occurred dialog explains why after Apply or Confirm.
Did an error appear after Apply?
| Message | What to do |
|---|---|
| This edit would leave the operation unchanged | Your change matches the current operation. Change something else, or click Cancel. |
| No finishing strategy can machine all of the selected faces | Select fewer faces, or split the faces across operations. See Change which faces a finishing operation machines. |
| The chosen finishing strategy cannot machine the selected faces | Choose a different Operation type, or change the faces. |
| No deburring strategy can machine all of the selected edges | Select fewer edges. |
| The chosen deburring strategy cannot machine the selected edges / No deburring operation can machine all of the selected edges with the chosen strategy | Choose a different tool or strategy. |
| Request failed precondition | CAM Assist couldn't apply the edit to this program. Run CAM Assist again, then edit. |
Is the button disabled?
Hover over it to see why.
| Tooltip | What to do |
|---|---|
| Waiting for full program | Wait for the run or program update to finish. |
| You must make an edit to Apply | Change at least one setting. |
| Another edit changed this operation. Cancel, then edit it again. | Click Cancel, then click Edit strategy again. |
| Loading options... / Face selection in progress | Wait, or finish selecting faces and click Confirm. |
| Not possible to edit for this operation type | This setting is fixed for this kind of operation. |
| It is not possible to split an operation with only one face | You can only split operations with two or more faces. |
| Apply or discard your changes before splitting an operation. / Apply or discard your changes before deleting an operation. | A strategy edit is open or set aside. Click Apply or Cancel in the strategy editor, or Discard all strategy changes below the operations. |
| Not possible for operations with only one material removal volume. | You can only change boundaries of roughing operations with two or more volumes. |
| Not possible to disable this option with current operation settings | The locked tool assembly is only available with Select from all appropriate twist drills. Unlock or change the Tool assembly first. |
If Split operation or Change volume boundaries is greyed out with no tooltip, another action is open in the strategy editor. Finish or cancel it first.
Did a message appear while selecting?
| Message | What to do |
|---|---|
| Only allowed faces can be selected | Pick a face highlighted as available. |
| At least one face must remain selected / At least one face must remain unselected | Keep at least one face in, and when splitting, at least one face out. |
| Only removal volumes can be selected / At least one removal volume must remain selected | Pick only highlighted roughing volumes, and keep at least one. |
| No tool assemblies suit this operation. | No tool in the part's tool libraries can do this operation. Add a suitable tool in the Tools stage. |
See also Edit an operation, Split a finishing operation and Change roughing boundaries.
Still not working?
If you've checked all of the above, contact CloudNC support. Include the part file, the Error event id if a dialog appeared, and your CAM Assist log files: see Find your CAM Assist log files.