Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr ThermoPower_ThermoPower.Examples.BraytonCycle.OpenLoopSimulator.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoPower 3.1.0-master/package.mo", uses=false) Using package ThermoPower with version 3.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoPower 3.1.0-master/package.mo) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo) Using package Complex with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo) Using package ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Running command: translateModel(ThermoPower.Examples.BraytonCycle.OpenLoopSimulator,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ThermoPower_ThermoPower.Examples.BraytonCycle.OpenLoopSimulator") translateModel(ThermoPower.Examples.BraytonCycle.OpenLoopSimulator,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ThermoPower_ThermoPower.Examples.BraytonCycle.OpenLoopSimulator") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0009804/0.0009804, allocations: 94.17 kB / 16.3 MB, free: 5.996 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.000914/0.0009141, allocations: 182.6 kB / 17.2 MB, free: 5.914 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.54/1.54, allocations: 205.4 MB / 223.4 MB, free: 13.16 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ThermoPower 3.1.0-master/package.mo): time 0.321/0.321, allocations: 48.78 MB / 320.4 MB, free: 11.31 MB / 270.1 MB Warning: Ignoring unknown experiment annotation option: __Dymola_NumberOfIntervals = 5000 Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.0007864/0.0007865, allocations: 15.44 kB / 391.1 MB, free: 50.16 MB / 318.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.143/0.1438, allocations: 60.26 MB / 451.4 MB, free: 9.598 MB / 334.1 MB Notification: Performance of NFInst.instantiate(ThermoPower.Examples.BraytonCycle.OpenLoopSimulator): time 0.4659/0.6098, allocations: 176.2 MB / 0.6129 GB, free: 2.801 MB / 430.1 MB Notification: Performance of NFInst.instExpressions: time 0.01301/0.6228, allocations: 8.893 MB / 0.6216 GB, free: 11.68 MB / 446.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.00206/0.6249, allocations: 27.84 kB / 0.6216 GB, free: 11.66 MB / 446.1 MB Notification: Performance of NFTyping.typeComponents: time 0.002421/0.6274, allocations: 0.6645 MB / 0.6222 GB, free: 11.09 MB / 446.1 MB Notification: Performance of NFTyping.typeBindings: time 0.003922/0.6313, allocations: 1.22 MB / 0.6234 GB, free: 10.11 MB / 446.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.008905/0.6402, allocations: 2.95 MB / 0.6263 GB, free: 8.039 MB / 446.1 MB Notification: Performance of NFFlatten.flatten: time 0.005821/0.6461, allocations: 2.699 MB / 0.6289 GB, free: 6.277 MB / 446.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.00349/0.6496, allocations: 1.641 MB / 0.6306 GB, free: 5.281 MB / 446.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.004413/0.654, allocations: 1.67 MB / 0.6322 GB, free: 4.105 MB / 446.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.00295/0.657, allocations: 1.172 MB / 0.6333 GB, free: 2.93 MB / 446.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0007269/0.6578, allocations: 120 kB / 0.6334 GB, free: 2.812 MB / 446.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.007152/0.665, allocations: 2.715 MB / 0.6361 GB, free: 96 kB / 446.1 MB Notification: Performance of NFScalarize.scalarize: time 0.002123/0.6671, allocations: 1.395 MB / 0.6375 GB, free: 14.7 MB / 462.1 MB Notification: Performance of NFVerifyModel.verify: time 0.001622/0.6688, allocations: 0.7266 MB / 0.6382 GB, free: 13.96 MB / 462.1 MB Notification: Performance of NFConvertDAE.convert: time 0.007259/0.676, allocations: 5.323 MB / 0.6434 GB, free: 8.629 MB / 462.1 MB Notification: Performance of FrontEnd - DAE generated: time 3.136e-06/0.6761, allocations: 4 kB / 0.6434 GB, free: 8.625 MB / 462.1 MB Notification: Performance of FrontEnd: time 2.044e-06/0.6761, allocations: 0 / 0.6434 GB, free: 8.625 MB / 462.1 MB Notification: Performance of Transformations before backend: time 0.0001423/0.6763, allocations: 0 / 0.6434 GB, free: 8.625 MB / 462.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 561 * Number of variables: 561 Notification: Performance of Generate backend data structure: time 0.006541/0.6828, allocations: 3.181 MB / 0.6465 GB, free: 5.375 MB / 462.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.136e-05/0.6829, allocations: 8.031 kB / 0.6465 GB, free: 5.367 MB / 462.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002885/0.6857, allocations: 0.6244 MB / 0.6471 GB, free: 4.738 MB / 462.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003793/0.6896, allocations: 1.996 MB / 0.649 GB, free: 2.672 MB / 462.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001081/0.6897, allocations: 164.4 kB / 0.6492 GB, free: 2.508 MB / 462.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0003145/0.69, allocations: 231.9 kB / 0.6494 GB, free: 2.281 MB / 462.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.004759/0.6948, allocations: 3.124 MB / 0.6525 GB, free: 15.04 MB / 478.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 4.134e-05/0.6948, allocations: 0 / 0.6525 GB, free: 15.04 MB / 478.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0002749/0.6951, allocations: 112 kB / 0.6526 GB, free: 14.93 MB / 478.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 7.715e-05/0.6952, allocations: 76.31 kB / 0.6526 GB, free: 14.85 MB / 478.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.003785/0.699, allocations: 2.508 MB / 0.6551 GB, free: 12.32 MB / 478.1 MB Warning: The model contains alias variables with redundant start and/or conflicting nominal values. It is recommended to resolve the conflicts, because otherwise the system could be hard to solve. To print the conflicting alias sets and the chosen candidates please use -d=aliasConflicts. Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.01957/0.7186, allocations: 13.24 MB / 0.668 GB, free: 14.12 MB / 494.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.001467/0.7201, allocations: 1.012 MB / 0.669 GB, free: 13.11 MB / 494.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.0006933/0.7208, allocations: 311 kB / 0.6693 GB, free: 12.77 MB / 494.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 6.245e-05/0.7208, allocations: 64.73 kB / 0.6694 GB, free: 12.7 MB / 494.1 MB Notification: Performance of pre-optimization done (n=106): time 4.91e-06/0.7209, allocations: 0 / 0.6694 GB, free: 12.7 MB / 494.1 MB Notification: Performance of matching and sorting (n=119): time 0.01464/0.7355, allocations: 5.902 MB / 0.6751 GB, free: 6.668 MB / 494.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 7.981e-05/0.7356, allocations: 171.2 kB / 0.6753 GB, free: 6.461 MB / 494.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.005003/0.7406, allocations: 3.976 MB / 0.6792 GB, free: 2.465 MB / 494.1 MB Notification: Performance of collectPreVariables (initialization): time 0.0003476/0.741, allocations: 61.7 kB / 0.6792 GB, free: 2.398 MB / 494.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.001067/0.7421, allocations: 1.397 MB / 0.6806 GB, free: 0.9844 MB / 494.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0003846/0.7425, allocations: 437.7 kB / 0.681 GB, free: 0.5508 MB / 494.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 8.923e-05/0.7426, allocations: 36 kB / 0.6811 GB, free: 0.5156 MB / 494.1 MB Notification: Performance of setup shared object (initialization): time 0.0001338/0.7427, allocations: 361.9 kB / 0.6814 GB, free: 160 kB / 494.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001125/0.7438, allocations: 0.8005 MB / 0.6822 GB, free: 15.35 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001287/0.7451, allocations: 1.117 MB / 0.6833 GB, free: 14.11 MB / 0.4981 GB Warning: It was not possible to determine if the initialization problem is consistent, because of not evaluable parameters/start values during compile time: $DER.plant.generator.theta = plant.generator.omega_e_nom (6.283185307179586 * plant.grid.fnom = plant.generator.omega_e_nom) Notification: Performance of analyzeInitialSystem (initialization): time 0.01437/0.7595, allocations: 4.088 MB / 0.6873 GB, free: 10 MB / 0.4981 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 9.858e-06/0.7595, allocations: 4 kB / 0.6873 GB, free: 10 MB / 0.4981 GB Notification: Performance of matching and sorting (n=188) (initialization): time 0.004932/0.7645, allocations: 2.771 MB / 0.69 GB, free: 7.219 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 0.001217/0.7657, allocations: 3.558 MB / 0.6935 GB, free: 3.301 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.646e-05/0.7657, allocations: 12 kB / 0.6935 GB, free: 3.289 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.004663/0.7704, allocations: 1.187 MB / 0.6946 GB, free: 2.098 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001472/0.7719, allocations: 307.6 kB / 0.6949 GB, free: 1.797 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.003272/0.7752, allocations: 3.714 MB / 0.6985 GB, free: 13.98 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002429/0.7776, allocations: 263.6 kB / 0.6988 GB, free: 13.72 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001668/0.7778, allocations: 79.98 kB / 0.6989 GB, free: 13.64 MB / 0.5137 GB Notification: Performance of prepare postOptimizeDAE: time 1.318e-05/0.7778, allocations: 4 kB / 0.6989 GB, free: 13.64 MB / 0.5137 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.004159/0.782, allocations: 2.453 MB / 0.7013 GB, free: 11.18 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.405e-05/0.782, allocations: 8 kB / 0.7013 GB, free: 11.17 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.003083/0.7851, allocations: 0.9658 MB / 0.7022 GB, free: 10.21 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001459/0.7866, allocations: 343.4 kB / 0.7025 GB, free: 9.871 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00371/0.7903, allocations: 4.773 MB / 0.7072 GB, free: 4.953 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002677/0.793, allocations: 247.8 kB / 0.7074 GB, free: 4.711 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001675/0.7932, allocations: 83.97 kB / 0.7075 GB, free: 4.629 MB / 0.5137 GB Warning: The initial conditions are over specified. The following 1 initial equations are redundant, so they are removed from the initialization sytem: $DER.plant.generator.theta = plant.generator.omega_e_nom. Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 37 * Number of states: 0 () * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (145): * Single equations (assignments): 141 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 3 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 0 * Non-linear Jacobian: 3 {1,1,1} * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 1 {12 32} Notification: Performance of prepare postOptimizeDAE: time 0.00221/0.7954, allocations: 0.9964 MB / 0.7085 GB, free: 3.621 MB / 0.5137 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0006097/0.796, allocations: 296.5 kB / 0.7088 GB, free: 3.328 MB / 0.5137 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003793/0.7998, allocations: 2.165 MB / 0.7109 GB, free: 1.148 MB / 0.5137 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.493e-05/0.7998, allocations: 16 kB / 0.7109 GB, free: 1.133 MB / 0.5137 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.441e-05/0.7999, allocations: 3.953 kB / 0.7109 GB, free: 1.129 MB / 0.5137 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.255e-05/0.7999, allocations: 7.984 kB / 0.7109 GB, free: 1.121 MB / 0.5137 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.008094/0.808, allocations: 5.056 MB / 0.7159 GB, free: 11.99 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.74e-06/0.808, allocations: 4 kB / 0.7159 GB, free: 11.99 MB / 0.5294 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001647/0.8097, allocations: 319.5 kB / 0.7162 GB, free: 11.68 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.001361/0.811, allocations: 314.3 kB / 0.7165 GB, free: 11.36 MB / 0.5294 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001122/0.8112, allocations: 47.97 kB / 0.7165 GB, free: 11.31 MB / 0.5294 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.003551/0.8147, allocations: 5.862 MB / 0.7222 GB, free: 5.152 MB / 0.5294 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.753e-06/0.8147, allocations: 64 / 0.7222 GB, free: 5.152 MB / 0.5294 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.004833/0.8196, allocations: 2.749 MB / 0.7249 GB, free: 2.371 MB / 0.5294 GB Notification: Performance of postOpt removeConstants (simulation): time 0.002103/0.8217, allocations: 0.7473 MB / 0.7257 GB, free: 1.602 MB / 0.5294 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0003616/0.8221, allocations: 35.98 kB / 0.7257 GB, free: 1.566 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001895/0.824, allocations: 207.6 kB / 0.7259 GB, free: 1.363 MB / 0.5294 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.000167/0.8241, allocations: 81.06 kB / 0.726 GB, free: 1.285 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001836/0.8243, allocations: 111.9 kB / 0.7261 GB, free: 1.176 MB / 0.5294 GB Notification: Performance of sorting global known variables: time 0.003622/0.828, allocations: 2.81 MB / 0.7288 GB, free: 14.36 MB / 0.545 GB Notification: Performance of sort global known variables: time 1.6e-07/0.828, allocations: 7.938 kB / 0.7288 GB, free: 14.36 MB / 0.545 GB Notification: Performance of remove unused functions: time 0.00352/0.8315, allocations: 1.309 MB / 0.7301 GB, free: 13.05 MB / 0.545 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 13 (plant.generator.omega_m,plant.generator.omega_e_filt,plant.turbine.phi,plant.CombustionChamber1.fluegas.p,plant.CombustionChamber1.fluegas.Xi[1],plant.CombustionChamber1.fluegas.Xi[2],plant.CombustionChamber1.fluegas.Xi[3],plant.CombustionChamber1.fluegas.Xi[4],plant.CombustionChamber1.fluegas.Xi[5],plant.CombustionChamber1.fluegas.T,plant.CombustionChamber1.Tm,plant.gasFlowActuator.y,plant.powerSensor1.y) * Number of discrete variables: 0 () * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (111): * Single equations (assignments): 103 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 5 * Torn equation systems: 3 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 0 * Non-linear Jacobian: 5 {1,1,1,1,1} * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 1 {(1,100.0%) 1} * Non-linear torn systems: 2 {3 8,1 4} Notification: Performance of Backend phase and start with SimCode phase: time 0.003172/0.8347, allocations: 1.041 MB / 0.7311 GB, free: 12.01 MB / 0.545 GB Notification: Performance of simCode: created initialization part: time 0.005902/0.8406, allocations: 3.356 MB / 0.7344 GB, free: 8.66 MB / 0.545 GB Notification: Performance of simCode: created event and clocks part: time 1.319e-05/0.8406, allocations: 7 kB / 0.7344 GB, free: 8.652 MB / 0.545 GB Notification: Performance of simCode: created simulation system equations: time 0.001927/0.8426, allocations: 1.095 MB / 0.7355 GB, free: 7.543 MB / 0.545 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.006043/0.8486, allocations: 1.182 MB / 0.7366 GB, free: 6.359 MB / 0.545 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.2459/1.095, allocations: 7.093 MB / 0.7435 GB, free: 215.8 MB / 0.545 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.002426/1.097, allocations: 2.047 MB / 0.7455 GB, free: 215.1 MB / 0.545 GB Notification: Performance of simCode: alias equations: time 0.004072/1.101, allocations: 0.6359 MB / 0.7462 GB, free: 215 MB / 0.545 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0007678/1.102, allocations: 191 kB / 0.7463 GB, free: 215 MB / 0.545 GB Notification: Performance of SimCode: time 1.463e-06/1.102, allocations: 1.281 kB / 0.7464 GB, free: 215 MB / 0.545 GB Notification: Performance of Templates: time 0.103/1.205, allocations: 68.76 MB / 0.8135 GB, free: 166.6 MB / 0.545 GB make -j1 -f ThermoPower_ThermoPower.Examples.BraytonCycle.OpenLoopSimulator.makefile Environment - environmentSimulation: (rm -f ThermoPower_ThermoPower.Examples.BraytonCycle.OpenLoopSimulator.pipe ; mkfifo ThermoPower_ThermoPower.Examples.BraytonCycle.OpenLoopSimulator.pipe ; head -c 1048576 < ThermoPower_ThermoPower.Examples.BraytonCycle.OpenLoopSimulator.pipe >> ../files/ThermoPower_ThermoPower.Examples.BraytonCycle.OpenLoopSimulator.sim & ./ThermoPower_ThermoPower.Examples.BraytonCycle.OpenLoopSimulator -abortSlowSimulation -alarm=480 -lv LOG_STATS > ThermoPower_ThermoPower.Examples.BraytonCycle.OpenLoopSimulator.pipe 2>&1) Environment - environmentSimulation: