Troubleshooting
Warnings that will not go away, a red support, a shared link that lost its scenario, a phone that only offers the quiz, and progress that did not sync.
| Symptom | Likely cause & fix |
|---|---|
| UPLIFT — unstable! will not clear | The load (or part of a UDL) sits beyond the last hoist or support. Move it back between them, or move the hoist in so the load sits inside it. On the ground (Overhang) the tool suggests ballast. This is the lesson, not a bug. |
| Skew warning on a load that looks central | Self-weight or chain weight is asymmetric because the insets differ, or a second load is off-centre. Check both loads and the insets. |
| A support is drawn red | Its load is above the example WLL of the hardware chosen on the Safety factors tab. Pick a different preset there, or reduce the load. It is a teaching comparison, not a rating. |
| Bridle inputs jump or refuse a value | The apex must stay between the anchors, and the drop has a minimum — a 0° bridle would need infinite tension, so the tool clamps it and says so. |
| A bridle angle does not match my course | Check the convention: RiggingSense measures from horizontal and shows the angle from vertical (β) and between the legs next to it. See Bridles. |
| Steep bridles (legs above ~45°) look right now but did not before | Fixed in August 2026: drops were silently capped. Re-open old scenarios; the numbers are now what the geometry says. |
| A quiz explanation seems to contradict the scenario | Reload the page so the current version loads; if it persists, note the question and report it. |
| Numeric answer marked wrong although it is close | The tolerance tightens as you level up, it is stricter when you guess low, and it is judged in the displayed unit. Check the note under the answer and your Unit setting. |
| On a phone, only the quiz opens | The Sandbox and Bridles tabs need a tablet or a computer (768 px wide and up). The Training quiz works on the phone. |
| Shared link opens the tool with the default scenario | The part of the link after # was lost — some messaging apps cut it. Ask the sender to press Copy link again and send it as plain text. Signing in after opening the link is fine; the scenario is kept through the login. |
| Saved scenarios missing on another device | Both devices must be signed in to the same account, with a confirmed email, and online. Reload. See Account sync. |
| Progress won't be saved in this browser mode | Private browsing or blocked storage. Use a normal window; sync needs local storage to hold the data first. |
| Print window was blocked | Allow pop-ups for this site and press Print again. |
| The disclaimer keeps reappearing | It is shown once per account until you press Got it; afterwards a slim strip stays visible by design. |
The numbers do not match my rigging course
Check the unit first (kg, kN, lb), then whether self-weight and chain weight are on, then which angle convention the course uses. If a course or a manufacturer's span table still disagrees, the course and the manufacturer win. RiggingSense teaches the statics with illustrative presets; it does not carry manufacturer data.
Thanks for the feedback.