Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr OpenIPSL_OpenIPSL.Examples.DAEMode.SMIB_Examples.Example_1.Network1.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/Modelica 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/OpenIPSL 3.0.1/package.mo", uses=false) Using package OpenIPSL with version 3.0.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/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 Modelica with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 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(OpenIPSL.Examples.DAEMode.SMIB_Examples.Example_1.Network1,tolerance=1e-06,outputFormat="empty",numberOfIntervals=200000,variableFilter="",fileNamePrefix="OpenIPSL_OpenIPSL.Examples.DAEMode.SMIB_Examples.Example_1.Network1") translateModel(OpenIPSL.Examples.DAEMode.SMIB_Examples.Example_1.Network1,tolerance=1e-06,outputFormat="empty",numberOfIntervals=200000,variableFilter="",fileNamePrefix="OpenIPSL_OpenIPSL.Examples.DAEMode.SMIB_Examples.Example_1.Network1") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001259/0.001259, allocations: 99.86 kB / 15.05 MB, free: 1.105 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.327/1.327, allocations: 223.2 MB / 238.9 MB, free: 5.637 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001632/0.001631, allocations: 181.1 kB / 290.2 MB, free: 2.328 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/package.mo): time 0.4484/0.4484, allocations: 78.52 MB / 419.8 MB, free: 4.367 MB / 286.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0003683/0.0003686, allocations: 20 kB / 499.7 MB, free: 6.41 MB / 366.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1397/0.1401, allocations: 69.36 MB / 0.5557 GB, free: 1.008 MB / 430.1 MB Notification: Performance of NFInst.instantiate(OpenIPSL.Examples.DAEMode.SMIB_Examples.Example_1.Network1): time 0.2253/0.3654, allocations: 4.534 MB / 0.5601 GB, free: 37.41 MB / 430.1 MB Notification: Performance of NFInst.instExpressions: time 0.002668/0.3681, allocations: 1.705 MB / 0.5618 GB, free: 37.18 MB / 430.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0004389/0.3686, allocations: 8.094 kB / 0.5618 GB, free: 37.18 MB / 430.1 MB Notification: Performance of NFTyping.typeComponents: time 0.0003211/0.3689, allocations: 116.8 kB / 0.5619 GB, free: 37.14 MB / 430.1 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/OpenIPSL 3.0.1/Electrical/Branches/PSAT/TwoWindingTransformer.mo:44:3-44:83:writable] Warning: In relation twoWindingTransformer.m <> 1.0, <> on Real numbers is only allowed inside functions. Notification: Performance of NFTyping.typeBindings: time 0.001323/0.3702, allocations: 0.5701 MB / 0.5625 GB, free: 37.07 MB / 430.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.0008301/0.3711, allocations: 387.3 kB / 0.5628 GB, free: 37.05 MB / 430.1 MB Notification: Performance of NFFlatten.flatten: time 0.001071/0.3722, allocations: 0.7295 MB / 0.5635 GB, free: 37.02 MB / 430.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0003058/0.3725, allocations: 194.4 kB / 0.5637 GB, free: 36.98 MB / 430.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0005279/0.373, allocations: 395.2 kB / 0.5641 GB, free: 36.9 MB / 430.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0005769/0.3736, allocations: 0.5112 MB / 0.5646 GB, free: 36.81 MB / 430.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0001186/0.3737, allocations: 49.62 kB / 0.5647 GB, free: 36.81 MB / 430.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.0003662/0.3741, allocations: 161.9 kB / 0.5648 GB, free: 36.8 MB / 430.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0001476/0.3743, allocations: 187.4 kB / 0.565 GB, free: 36.77 MB / 430.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0001324/0.3744, allocations: 175.2 kB / 0.5652 GB, free: 36.71 MB / 430.1 MB Notification: Performance of NFConvertDAE.convert: time 0.0008797/0.3753, allocations: 1.073 MB / 0.5662 GB, free: 36.63 MB / 430.1 MB Notification: Performance of FrontEnd - DAE generated: time 1.873e-06/0.3753, allocations: 0 / 0.5662 GB, free: 36.63 MB / 430.1 MB Notification: Performance of FrontEnd: time 1.673e-06/0.3753, allocations: 3.062 kB / 0.5662 GB, free: 36.63 MB / 430.1 MB Notification: Performance of Transformations before backend: time 1.665e-05/0.3753, allocations: 0.7812 kB / 0.5662 GB, free: 36.63 MB / 430.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 132 * Number of variables: 132 Notification: Performance of Generate backend data structure: time 0.004956/0.3803, allocations: 1.718 MB / 0.5679 GB, free: 35.94 MB / 430.1 MB Notification: Performance of prepare preOptimizeDAE: time 3.176e-05/0.3803, allocations: 8.719 kB / 0.5679 GB, free: 35.94 MB / 430.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.003279/0.3836, allocations: 0.5283 MB / 0.5684 GB, free: 35.89 MB / 430.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0009143/0.3846, allocations: 0.6499 MB / 0.569 GB, free: 35.6 MB / 430.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001524/0.3847, allocations: 161 kB / 0.5692 GB, free: 35.5 MB / 430.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001059/0.3848, allocations: 65.69 kB / 0.5693 GB, free: 35.49 MB / 430.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001516/0.3864, allocations: 0.8157 MB / 0.5701 GB, free: 35.42 MB / 430.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 1.694e-05/0.3864, allocations: 0 / 0.5701 GB, free: 35.42 MB / 430.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 8.595e-05/0.3865, allocations: 26.97 kB / 0.5701 GB, free: 35.42 MB / 430.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.163e-05/0.3865, allocations: 12.03 kB / 0.5701 GB, free: 35.42 MB / 430.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001242/0.3877, allocations: 0.7261 MB / 0.5708 GB, free: 35.42 MB / 430.1 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 0.004515/0.3923, allocations: 3.052 MB / 0.5738 GB, free: 34.23 MB / 430.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.01254/0.4048, allocations: 3.949 MB / 0.5776 GB, free: 33.55 MB / 430.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.0001355/0.405, allocations: 12.41 kB / 0.5776 GB, free: 33.55 MB / 430.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.957e-05/0.405, allocations: 46.17 kB / 0.5777 GB, free: 33.5 MB / 430.1 MB Notification: Performance of pre-optimization done (n=64): time 3.065e-06/0.405, allocations: 0 / 0.5777 GB, free: 33.5 MB / 430.1 MB Notification: Performance of matching and sorting (n=64): time 0.01286/0.4179, allocations: 4.35 MB / 0.5819 GB, free: 32.39 MB / 430.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 3.726e-05/0.418, allocations: 83.42 kB / 0.582 GB, free: 32.29 MB / 430.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.00098/0.419, allocations: 0.7817 MB / 0.5828 GB, free: 31.94 MB / 430.1 MB Notification: Performance of collectPreVariables (initialization): time 0.0001036/0.4191, allocations: 36.3 kB / 0.5828 GB, free: 31.9 MB / 430.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0001946/0.4193, allocations: 374.7 kB / 0.5832 GB, free: 31.61 MB / 430.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0001728/0.4195, allocations: 239.6 kB / 0.5834 GB, free: 31.43 MB / 430.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 6.119e-05/0.4195, allocations: 20.69 kB / 0.5834 GB, free: 31.41 MB / 430.1 MB Notification: Performance of setup shared object (initialization): time 5.844e-05/0.4196, allocations: 339.5 kB / 0.5837 GB, free: 31.09 MB / 430.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001005/0.4206, allocations: 0.5831 MB / 0.5843 GB, free: 30.87 MB / 430.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001056/0.4217, allocations: 0.6917 MB / 0.585 GB, free: 30.55 MB / 430.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.00108/0.4228, allocations: 0.6266 MB / 0.5856 GB, free: 30.27 MB / 430.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.298e-06/0.4228, allocations: 1.062 kB / 0.5856 GB, free: 30.27 MB / 430.1 MB Notification: Performance of matching and sorting (n=125) (initialization): time 0.00733/0.4301, allocations: 2.873 MB / 0.5884 GB, free: 29.45 MB / 430.1 MB Notification: Performance of prepare postOptimizeDAE: time 0.0001175/0.4302, allocations: 0.6247 MB / 0.589 GB, free: 28.79 MB / 430.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.498e-06/0.4303, allocations: 1.062 kB / 0.589 GB, free: 28.79 MB / 430.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.004386/0.4346, allocations: 1.255 MB / 0.5902 GB, free: 28.56 MB / 430.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008502/0.4355, allocations: 170.9 kB / 0.5904 GB, free: 28.54 MB / 430.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01085/0.4464, allocations: 5.609 MB / 0.5959 GB, free: 25.7 MB / 430.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001323/0.4477, allocations: 137.6 kB / 0.596 GB, free: 25.64 MB / 430.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 9.606e-05/0.4478, allocations: 36.16 kB / 0.5961 GB, free: 25.63 MB / 430.1 MB Notification: Performance of prepare postOptimizeDAE: time 9.989e-06/0.4479, allocations: 3.688 kB / 0.5961 GB, free: 25.63 MB / 430.1 MB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.007365/0.4552, allocations: 2.739 MB / 0.5987 GB, free: 24.87 MB / 430.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.143e-05/0.4553, allocations: 3.703 kB / 0.5987 GB, free: 24.87 MB / 430.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.004466/0.4597, allocations: 1.253 MB / 0.6 GB, free: 24.64 MB / 430.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008782/0.4606, allocations: 164.8 kB / 0.6001 GB, free: 24.63 MB / 430.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01083/0.4715, allocations: 5.601 MB / 0.6056 GB, free: 21.79 MB / 430.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001206/0.4727, allocations: 125.2 kB / 0.6057 GB, free: 21.74 MB / 430.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.046e-05/0.4728, allocations: 43.33 kB / 0.6057 GB, free: 21.72 MB / 430.1 MB Warning: Assuming fixed start value for the following 2 variables: G1.aVRtypeIII.vref:VARIABLE(unit = "1" fixed = true protected = true ) type: Real G1.order6.w:VARIABLE(flow=false start = 1.0 fixed = true ) "Rotor speed [pu]" type: Real Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 7 * 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 (103): * Single equations (assignments): 100 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 2 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 2 {(2,100.0%),(2,100.0%)} * Non-linear Jacobian: 0 * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 1 {8 13} Notification: Performance of prepare postOptimizeDAE: time 0.0004896/0.4733, allocations: 298.6 kB / 0.606 GB, free: 21.46 MB / 430.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001529/0.4734, allocations: 87.59 kB / 0.6061 GB, free: 21.41 MB / 430.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.006473/0.4799, allocations: 2.394 MB / 0.6085 GB, free: 20.76 MB / 430.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.937e-06/0.48, allocations: 7.188 kB / 0.6085 GB, free: 20.76 MB / 430.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.069e-05/0.48, allocations: 9.281 kB / 0.6085 GB, free: 20.75 MB / 430.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.303e-05/0.48, allocations: 3.047 kB / 0.6085 GB, free: 20.75 MB / 430.1 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 postOpt removeSimpleEquations (simulation): time 0.007822/0.4878, allocations: 3.691 MB / 0.6121 GB, free: 19.25 MB / 430.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.059e-06/0.4878, allocations: 0 / 0.6121 GB, free: 19.25 MB / 430.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005125/0.4884, allocations: 83.42 kB / 0.6122 GB, free: 19.18 MB / 430.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.003101/0.4915, allocations: 1.083 MB / 0.6132 GB, free: 18.33 MB / 430.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.005e-05/0.4915, allocations: 21.27 kB / 0.6132 GB, free: 18.31 MB / 430.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.007059/0.4986, allocations: 4.304 MB / 0.6174 GB, free: 14.14 MB / 430.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.064e-06/0.4986, allocations: 4 kB / 0.6174 GB, free: 14.14 MB / 430.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.006705/0.5053, allocations: 3.091 MB / 0.6205 GB, free: 11 MB / 430.1 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0002611/0.5056, allocations: 183.8 kB / 0.6206 GB, free: 10.8 MB / 430.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000124/0.5058, allocations: 20.08 kB / 0.6207 GB, free: 10.79 MB / 430.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0007482/0.5065, allocations: 83.88 kB / 0.6207 GB, free: 10.7 MB / 430.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002989/0.5068, allocations: 122.1 kB / 0.6209 GB, free: 10.59 MB / 430.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.457e-05/0.5069, allocations: 19.98 kB / 0.6209 GB, free: 10.57 MB / 430.1 MB Notification: Performance of sorting global known variables: time 0.0005643/0.5075, allocations: 0.532 MB / 0.6214 GB, free: 10.04 MB / 430.1 MB Notification: Performance of sort global known variables: time 2.2e-07/0.5075, allocations: 0 / 0.6214 GB, free: 10.04 MB / 430.1 MB Notification: Performance of remove unused functions: time 0.001508/0.509, allocations: 0.5267 MB / 0.6219 GB, free: 9.516 MB / 430.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 9 (G1.order6.delta,G1.order6.w,G1.order6.e1q,G1.order6.e1d,G1.order6.e2q,G1.order6.e2d,G1.aVRtypeIII.vm,G1.aVRtypeIII.vr,G1.aVRtypeIII.vf1) * 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 (47): * Single equations (assignments): 44 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 2 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 2 {(2,100.0%),(2,100.0%)} * Non-linear Jacobian: 0 * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 1 {(9,48.1%) 9} * Non-linear torn systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.0002265/0.5092, allocations: 123.2 kB / 0.622 GB, free: 9.387 MB / 430.1 MB Notification: Performance of simCode: created initialization part: time 0.007139/0.5164, allocations: 3.56 MB / 0.6255 GB, free: 5.727 MB / 430.1 MB Notification: Performance of simCode: created event and clocks part: time 4.819e-06/0.5164, allocations: 4 kB / 0.6255 GB, free: 5.723 MB / 430.1 MB Notification: Performance of simCode: created simulation system equations: time 0.002527/0.5189, allocations: 1.264 MB / 0.6267 GB, free: 4.402 MB / 430.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0005018/0.5194, allocations: 57.73 kB / 0.6268 GB, free: 4.348 MB / 430.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002702/0.5221, allocations: 2.146 MB / 0.6289 GB, free: 2.211 MB / 430.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0002908/0.5224, allocations: 0.9952 MB / 0.6299 GB, free: 1.191 MB / 430.1 MB Notification: Performance of simCode: alias equations: time 0.0003891/0.5228, allocations: 94.11 kB / 0.6299 GB, free: 1.102 MB / 430.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001793/0.523, allocations: 55.42 kB / 0.63 GB, free: 1.047 MB / 430.1 MB Notification: Performance of SimCode: time 6.41e-07/0.523, allocations: 0 / 0.63 GB, free: 1.047 MB / 430.1 MB Notification: Performance of Templates: time 0.02682/0.5499, allocations: 19.3 MB / 0.6489 GB, free: 13.93 MB / 462.1 MB make -j1 -f OpenIPSL_OpenIPSL.Examples.DAEMode.SMIB_Examples.Example_1.Network1.makefile Environment - environmentSimulation: (rm -f OpenIPSL_OpenIPSL.Examples.DAEMode.SMIB_Examples.Example_1.Network1.pipe ; mkfifo OpenIPSL_OpenIPSL.Examples.DAEMode.SMIB_Examples.Example_1.Network1.pipe ; head -c 1048576 < OpenIPSL_OpenIPSL.Examples.DAEMode.SMIB_Examples.Example_1.Network1.pipe >> ../files/OpenIPSL_OpenIPSL.Examples.DAEMode.SMIB_Examples.Example_1.Network1.sim & ./OpenIPSL_OpenIPSL.Examples.DAEMode.SMIB_Examples.Example_1.Network1 -abortSlowSimulation -alarm=480 -lv LOG_STATS > OpenIPSL_OpenIPSL.Examples.DAEMode.SMIB_Examples.Example_1.Network1.pipe 2>&1) Environment - environmentSimulation: