Environment - simulationEnvironment: startTime=0 stopTime=2 tolerance=1e-06 numberOfIntervals=5002 stepSize=0.00039984 Regular simulation: ./ModelicaTest_3.2.3_ModelicaTest.MultiBody.FourbarVariants.JointUSR -abortSlowSimulation -alarm=240 -s gbode -gbm=radauIIA3 -emit_protected -lv LOG_STATS LOG_STDOUT | warning | Numerical Jacobians without coloring are currently not supported by GBODE. Colored numerical Jacobian will be used. LOG_SUCCESS | info | The initialization finished successfully without homotopy method. LOG_ASSERT | info | [/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/Mechanics/MultiBody/Joints.mo:7844:7-7856:3:writable] | | | | The following assertion has been violated at time 0.475410 | | | | ((jointUSR.revolute.k1a > 1e-10)) --> " | | | | Singular position of loop (either no or two analytic solutions; | | | | the mechanism has lost one-degree-of freedom in this position). | | | | Try first to use another Modelica.Mechanics.MultiBody.Joints.Assemblies.JointXXX component. | | | | In most cases it is best that the joints outside of the JointXXX | | | | component are revolute and NOT prismatic joints. If this also | | | | lead to singular positions, it could be that this kinematic loop | | | | cannot be solved analytically. In this case you have to build | | | | up the loop with basic joints (NO aggregation JointXXX components) | | | | and rely on dynamic state selection, i.e., during simulation | | | | the states will be dynamically selected in such a way that in no | | | | position a degree of freedom is lost. | | | | " LOG_ASSERT | error | No event found, but assert was triggered. Throwing now! LOG_STATS | info | ### STATISTICS ### | | | | | timer | | | | | | 0s reading init.xml | | | | | | 0s reading info.xml | | | | | | 6.3078e-05s [ 0.8%] pre-initialization | | | | | | 0.000337906s [ 4.4%] initialization | | | | | | 0s [ 0.0%] steps | | | | | | 0s [ 0.0%] solver (excl. callbacks) | | | | | | 0.000530247s [ 6.9%] creating output-file | | | | | | 0s [ 0.0%] event-handling | | | | | | 0s [ 0.0%] overhead | | | | | | 0.0067388s [ 87.9%] simulation | | | | | | 0.00767003s [100.0%] total | | | | | events | | | | | | 0 state events | | | | | | 0 time events | | | | | solver: gbode | | | | | | 129 steps taken | | | | | | 1363 calls of functionODE | | | | | | 150 evaluations of jacobian | | | | | | 0 error test failures | | | | | | 66 convergence test failures | | | | | | 0s time of jacobian evaluation