RD8 Changelog
RD8 Software Changelog.

August 15, 2026
Import parameters from CSV
Updated CSV import workflow.
Sync datasets seamlessly with your CAD system.
From your CAD or Quality system: export nominal dimensions, tolerances, and meta data and import them into RD8 by a few clicks.
RD8 let's you preview the impact before importing the updated dataset.
Import is a four-step flow: upload a file, map columns, review the difference, then preview calculation impact before anything is written.
An example template is available to download if you need a starting format.
Columns can be mapped with a live preview of how each CSV header will land on RD8 fields. Elements in the file are matched to parts in the project, so rows line up with the right geometry.
On "Review changes", you see what will be created versus updated. On "Review calculation impact", you can see how the import would affect calculationsheets that use those parameters and confirm before committing.
Parameter History
Enhanced drill down functionality for all parameters; see the full history and details: who edited, when, and what was edited.
Seamlessly roll back and recover.
Easy access from the parameter list and calculation sheets - always just a click away.

Inline parameter editing and drafts
The parameter overview is now a working table, not a set of createand edit dialogs. You edit values in place. Changes are stored as drafts until you publish them, so you can iterate without immediately changing published calculation results.
Drafts can be published from the parameter overview, with an impact preview of the calculation sheets that would change. The publish dialog includes more context, so you can see what you are about to ship.
Improvements
- Added a reset control to path finder
- Added a warning on interface arrows whose parameter has been deleted
- GPS parameters are included in parameter export
- Interface arrows can be renumbered from the canvas
- Interface accordion sections now expand and collapse only from the icon, so accidental toggles are less likely
- Calculation sheets are easier to open from related views, and can be linked from unclarities
- Special unclarities now have an icon on the canvas
- Iteration 3D viewers now show context
- DOF archetype base color in the viewer follows the current theme
- Canvas context menu copy is clearer
- Parameter suggestions no longer steal focus
Fixes
- TED parameters can only have a single tolerance
- Intermediate calculation draft results are no longer left behind when they should be deleted
- Contacts from hidden context are no longer shown
- Displayed cc value and its tooltip stay aligned
- X-ray view for subsystems in architecture works again
- Filtering parameters by description works again
- Tolerance class coloring is consistent (no longer sometimes red and sometimes not)
- Editing the parameter type column with keyboard no longer crashes the app
- Canvas shape icons in toolbar buttons are no longer draggable
- Changing the element of a local parameter reused on a sheet now updates all related rows
JuLY 08, 2026
Intermediate Calculations
You can now slide out a panel "Intermediate Calculations" to break down complex calculations into bite size-pieces. You can define new variables on the fly and use them in other calculations.

Interface archetypes shown in the 3D viewer
An "Ideal Interface Illustration Gizmo" now appears next to the coordinate gizmo. It represents an illustrations of the ideal constraint-set.
Improvements
- Smoother camera motion when viewing normals
- Shorter publish flow for input parameters, with fewer confirmation steps
- Reduced click for drafting parameters
- All parameters enter draft mode when changed
June 04, 2026
Parameter Edits from Parameter Database
Added step to preview impact of changing parameter values (like when publishing a draft from a calculation).

3D Viewer: View to Normal + Roll
Added “View normal” button to the cross section controls that aligns camera to the normal of the cross section plane.

Added possibility to roll model along the screen normal (Alt + right-click + drag)

Calculation formula checks and new math operators
Extended calculation formula error tooltip to show both expression (like unmatched parentheses) and evaluation (like division by zero) errors, highlighting where in the formula the problem is.

Added functions/mah operators nonneg, nonpos, and abs to calculation formula.
Furhter fixes:
- Numpad Enter now triggers save
- No longer possible to insert linebreaks that cause calculation to fail
- Decreased size of help tooltip
- Element now shown again in parameter suggestions
Interface Analysis
Added option to “ignore” a constraint, which removes the constraint from the detailed analysis without adding an unclarity

Renamed “negligible” constraint to “insufficient” to better convey its intent: constraints that are present in the geometry but insufficient to actually constrain in the real world
Improvements
Parameter List in Calculation Sheets
- Cp, Cc, Cpk columns now account for the current distribution (Monte Carlo)
- Enabled Cp, Cc, Cpk, Distribution columns for GPS parameters
- Removed short number from value tooltip
- Removed types “Diameter” and “Radius” (have been migrated to “Linear”)
General
- Custom table column widths are now remembered between visits
- Graph labels no longer overlap when they’re close together
- Unsaved layout no longer resets when resizing the graph
Want a Demo?
We'll contact you.
By submitting, you accept RD8's Privacy Policy and Terms of Service.
Set up a free RD8 Software Trial for your team
Book an initial meeting to:
Let us know your contact details - and any additional clarification points - then we will get back as soon as possible.
By submitting, you accept RD8's Privacy Policy and Terms of Service.