Cutting Parameters Explorer or Edit cutting parameters is greyed out

Open cutting parameters explorer or Edit cutting parameters is greyed out in an operation's panel, or the explorer opens with a message instead of values. Hover over the greyed-out button to see the reason, then find it below.

Is Open cutting parameters explorer greyed out?

Tooltip	Fix
Waiting for full program	Wait for the run, or a regeneration, to finish.
The selected machine is missing … Please populate all required fields or select another machine before running CAM Assist.	Add the listed limits to the machine (spindle speed min and max, spindle power, spindle torque, table feed) in My Shop > Machines, or choose another machine in Assessment > Shop setup. See Add or edit a machine in CAM Assist. Then run CAM Assist again.
Cutting Parameters Explorer is not supported for custom or session materials.	Choose a CloudNC material in Assessment > Shop setup > Material, then run CAM Assist again.
The selected material does not have an ISO category assigned. Please assign one or select another material before running CAM Assist.	See Material invalid or missing an ISO category.
Cutting Parameters Explorer is unsupported for this operation.	The tool and usage combination isn't supported (see the next section), or the operation's tool or setup data is missing.

Which tools and usages does it support?

Tool	Supported usages
End mill	Adaptive roughing, Pocketing, Flat finishing, Wall finishing, Freeform, Helical boring, Face finishing, Face roughing
Ball mill	Flat finishing, Wall finishing, Freeform
Chamfer mill	Chamfering, Deburring
Face mill	Face finishing, Face roughing
Twist drill	Drilling
Spot drill	Spot drilling
Tap	Tapping
Thread mill	Thread milling
T-slot cutter	Undercutting

Reamers aren't supported. Every usage in the operation must be supported.

Is Edit cutting parameters greyed out?

Cutting parameter editing requires an available tool and selected stock material.

The editor needs both of these:

The operation's tool is in a tool library chosen for the part in the Tools stage.
A stock material is selected in Assessment > Shop setup > Material.

If the operation has more than one usage, for example cutting and ramping, Edit cutting parameters opens a menu: choose the usage to edit. If the editor says This editor currently supports single-usage operations only., close it and choose a single usage from that menu, or use the Cutting Parameters Explorer instead.

Is it greyed out on a cutting parameter preset?

In My Shop > Tool libraries, a preset's ⋮ menu has Cutting Parameters Explorer. If it's greyed out:

Tooltip	Fix
Assign a single stock material to the preset to enable Cutting Parameters Explorer	Set the preset to one stock material instead of all.
Cutting Parameters Explorer is not available for custom materials	Use a CloudNC material for the preset.
Cutting Parameters Explorer is not supported for this tool/usage	See the support table above.
Cutting Parameters Explorer is unsupported for this operation	CAM Assist couldn't work out the preset's cutting usage for this tool. Check the preset's usage and the tool's geometry.

The menu item isn't shown for presets you can't edit, such as those in a built-in CloudNC library. See Add or edit cutting parameter presets.

Does the explorer show a red message?

Message	What to do
Unable to convert tool	The tool's geometry is incomplete or invalid. Check it in the tool library. See Edit a tool's geometry.
Analyzing this tool type for this usage is currently unsupported	See the support table above.
Unable to fetch recommended constraints, Unable to fetch cutting parameters, Error generating constraints: …, Error generating cutting parameters: …	Close the explorer and open it again. If it keeps happening, contact support (below) and include the full message.

Opened it from your CAM package?

In Autodesk Fusion and Mastercam you can open the explorer from an operation in your CAM package. That window can show:

Message	What to do
The selected stock material is not supported by cutting parameter generation	Choose a CloudNC material with an ISO category and run CAM Assist again.
Cutting Parameters Explorer unavailable	Close the window and open it again from the operation.
Operation save failed.	The values weren't written to the operation. Try again.

Still not working?

If you've checked all of the above, contact CloudNC support. Include the part file, the operation name, the message you see, and the log files: see Find your CAM Assist log files.