Merge pull request #4001 from opensim-org/fix_path_fitter_num_coordin…

…ates

Allow paths fit by `PolynomialPathFitter` to depend on more than 6 coordinates

CHANGELOG.md

@@ -65,6 +65,7 @@ v4.6
     decorations were emitted for both `true` and `false`, resulting in double-emission).
   - It will now check for NaNed vectors coming from the underlying expression, skipping emission
     if one is detected (previously: it would emit decorations with `NaN`ed transforms).
+- `PolynomialPathFitter` now allows fitting paths that depend on more than 6 coordinates, matching recent changes to `MultivariatePolynomialFunction` (#4001).
 
 v4.5.1
 ======

OpenSim/Actuators/PolynomialPathFitter.cpp

@@ -842,10 +842,6 @@ void PolynomialPathFitter::filterSampledData(const Model& model,
                 momentArms.removeColumn(label);
             } else {
                 momentArmMap[path].push_back(coordinate);
-                OPENSIM_THROW_IF_FRMOBJ(momentArmMap[path].size() > 6,
-                        Exception,
-                        "The path '{}' depends on more than 6 coordinates. "
-                        "This is not supported.", path)
             }
         }
     }