Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr IDEAS_dev_IDEAS.Fluid.HeatExchangers.Examples.WaterCooler_T.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 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo", uses=false) Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/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 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: "" <> buildModelFMU(IDEAS.Fluid.HeatExchangers.Examples.WaterCooler_T,fileNamePrefix="IDEAS_dev_IDEAS_Fluid_HeatExchangers_Examples_WaterCooler_T",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IDEAS.Fluid.HeatExchangers.Examples.WaterCooler_T,fileNamePrefix="IDEAS_dev_IDEAS_Fluid_HeatExchangers_Examples_WaterCooler_T",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.00105/0.00105, allocations: 86.72 kB / 15.06 MB, free: 1.09 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001239/0.001239, allocations: 168.7 kB / 15.95 MB, free: 204 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.319/1.319, allocations: 223.2 MB / 240 MB, free: 5.406 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 0.933/0.933, allocations: 135.3 MB / 426.3 MB, free: 14.26 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.0003117/0.0003117, allocations: 8.625 kB / 0.5071 GB, free: 4.965 MB / 414.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1518/0.1521, allocations: 82.32 MB / 0.5875 GB, free: 2.828 MB / 494.1 MB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.HeatExchangers.Examples.WaterCooler_T): time 0.3226/0.4748, allocations: 49.02 MB / 0.6353 GB, free: 25.36 MB / 0.4981 GB Notification: Performance of NFInst.instExpressions: time 0.01778/0.4926, allocations: 14.22 MB / 0.6492 GB, free: 15.21 MB / 0.4981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.003135/0.4958, allocations: 75.5 kB / 0.6493 GB, free: 15.18 MB / 0.4981 GB Notification: Performance of NFTyping.typeComponents: time 0.00255/0.4984, allocations: 0.7586 MB / 0.65 GB, free: 14.8 MB / 0.4981 GB Notification: Performance of NFTyping.typeBindings: time 0.005291/0.5037, allocations: 1.885 MB / 0.6519 GB, free: 13.75 MB / 0.4981 GB Notification: Performance of NFTyping.typeClassSections: time 0.004713/0.5084, allocations: 1.729 MB / 0.6536 GB, free: 12.95 MB / 0.4981 GB Notification: Performance of NFFlatten.flatten: time 0.006392/0.5148, allocations: 5.135 MB / 0.6586 GB, free: 10.85 MB / 0.4981 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002744/0.5176, allocations: 1.226 MB / 0.6598 GB, free: 10.39 MB / 0.4981 GB Notification: Performance of NFEvalConstants.evaluate: time 0.004069/0.5216, allocations: 1.541 MB / 0.6613 GB, free: 9.766 MB / 0.4981 GB Notification: Performance of NFSimplifyModel.simplify: time 0.003269/0.5249, allocations: 1.262 MB / 0.6625 GB, free: 9.246 MB / 0.4981 GB Notification: Performance of NFPackage.collectConstants: time 0.0007601/0.5257, allocations: 68.41 kB / 0.6626 GB, free: 9.246 MB / 0.4981 GB Notification: Performance of NFFlatten.collectFunctions: time 0.005173/0.5309, allocations: 1.397 MB / 0.664 GB, free: 8.84 MB / 0.4981 GB Notification: Performance of NFScalarize.scalarize: time 0.001243/0.5322, allocations: 417.4 kB / 0.6644 GB, free: 8.656 MB / 0.4981 GB Notification: Performance of NFVerifyModel.verify: time 0.001459/0.5336, allocations: 403.1 kB / 0.6647 GB, free: 8.426 MB / 0.4981 GB Notification: Performance of NFConvertDAE.convert: time 0.005587/0.5392, allocations: 2.407 MB / 0.6671 GB, free: 7.824 MB / 0.4981 GB Notification: Performance of FrontEnd - DAE generated: time 7.525e-06/0.5393, allocations: 9.062 kB / 0.6671 GB, free: 7.816 MB / 0.4981 GB Notification: Performance of FrontEnd: time 2.315e-06/0.5393, allocations: 0 / 0.6671 GB, free: 7.816 MB / 0.4981 GB Notification: Performance of Transformations before backend: time 0.000139/0.5394, allocations: 0 / 0.6671 GB, free: 7.816 MB / 0.4981 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 281 * Number of variables: 281 Notification: Performance of Generate backend data structure: time 0.006805/0.5462, allocations: 2.193 MB / 0.6692 GB, free: 6.414 MB / 0.4981 GB Notification: Performance of prepare preOptimizeDAE: time 4.572e-05/0.5463, allocations: 10.25 kB / 0.6692 GB, free: 6.414 MB / 0.4981 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0006031/0.5469, allocations: 164.5 kB / 0.6694 GB, free: 6.305 MB / 0.4981 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.00246/0.5494, allocations: 489.6 kB / 0.6699 GB, free: 6.172 MB / 0.4981 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.00426/0.5536, allocations: 1.575 MB / 0.6714 GB, free: 5.312 MB / 0.4981 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0003884/0.554, allocations: 164.2 kB / 0.6716 GB, free: 5.258 MB / 0.4981 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0003853/0.5544, allocations: 120.4 kB / 0.6717 GB, free: 5.219 MB / 0.4981 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.003465/0.5579, allocations: 1.367 MB / 0.673 GB, free: 4.562 MB / 0.4981 GB Notification: Performance of preOpt findStateOrder (simulation): time 3.879e-05/0.558, allocations: 5.156 kB / 0.673 GB, free: 4.559 MB / 0.4981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001373/0.5581, allocations: 42.91 kB / 0.6731 GB, free: 4.527 MB / 0.4981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.369e-05/0.5582, allocations: 45.7 kB / 0.6731 GB, free: 4.52 MB / 0.4981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.003061/0.5612, allocations: 1.137 MB / 0.6742 GB, free: 4.137 MB / 0.4981 GB 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 0.01092/0.5722, allocations: 6.999 MB / 0.6811 GB, free: 14.84 MB / 0.5137 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002819/0.575, allocations: 1.446 MB / 0.6825 GB, free: 13.92 MB / 0.5137 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001127/0.5762, allocations: 443.4 kB / 0.6829 GB, free: 13.77 MB / 0.5137 GB Notification: Performance of preOpt evalFunc (simulation): time 0.006195/0.5824, allocations: 3.098 MB / 0.6859 GB, free: 11.28 MB / 0.5137 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001168/0.5836, allocations: 466.2 kB / 0.6864 GB, free: 11.12 MB / 0.5137 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0008966/0.5845, allocations: 80.84 kB / 0.6864 GB, free: 11.07 MB / 0.5137 GB Notification: Performance of pre-optimization done (n=61): time 4.518e-06/0.5846, allocations: 7.938 kB / 0.6864 GB, free: 11.07 MB / 0.5137 GB Notification: Performance of matching and sorting (n=61): time 0.003594/0.5882, allocations: 1.29 MB / 0.6877 GB, free: 10.55 MB / 0.5137 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.107e-05/0.5882, allocations: 66.38 kB / 0.6878 GB, free: 10.48 MB / 0.5137 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.003335/0.5916, allocations: 1.548 MB / 0.6893 GB, free: 9.895 MB / 0.5137 GB Notification: Performance of collectPreVariables (initialization): time 0.000146/0.5917, allocations: 42.89 kB / 0.6893 GB, free: 9.852 MB / 0.5137 GB Notification: Performance of collectInitialEqns (initialization): time 0.000963/0.5927, allocations: 0.8754 MB / 0.6902 GB, free: 9.16 MB / 0.5137 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002695/0.593, allocations: 220 kB / 0.6904 GB, free: 8.988 MB / 0.5137 GB Notification: Performance of simplifyInitialFunctions (initialization): time 7.464e-05/0.5931, allocations: 24.7 kB / 0.6904 GB, free: 8.969 MB / 0.5137 GB Notification: Performance of setup shared object (initialization): time 0.0001596/0.5933, allocations: 342.1 kB / 0.6907 GB, free: 8.648 MB / 0.5137 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001026/0.5943, allocations: 379.4 kB / 0.6911 GB, free: 8.539 MB / 0.5137 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001362/0.5957, allocations: 0.7631 MB / 0.6918 GB, free: 7.926 MB / 0.5137 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001218/0.5969, allocations: 492.8 kB / 0.6923 GB, free: 7.715 MB / 0.5137 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.476e-05/0.5969, allocations: 2.531 kB / 0.6923 GB, free: 7.715 MB / 0.5137 GB Notification: Performance of matching and sorting (n=122) (initialization): time 0.003621/0.6006, allocations: 1.298 MB / 0.6936 GB, free: 7.121 MB / 0.5137 GB Notification: Performance of prepare postOptimizeDAE: time 0.0005466/0.6011, allocations: 449.8 kB / 0.694 GB, free: 6.551 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.908e-05/0.6012, allocations: 10.59 kB / 0.694 GB, free: 6.551 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (initialization): time 6.425e-05/0.6012, allocations: 18.09 kB / 0.694 GB, free: 6.551 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001265/0.6025, allocations: 271.9 kB / 0.6943 GB, free: 6.48 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 6.188e-05/0.6026, allocations: 20.88 kB / 0.6943 GB, free: 6.477 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002222/0.6048, allocations: 144.8 kB / 0.6945 GB, free: 6.41 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001631/0.605, allocations: 52.3 kB / 0.6945 GB, free: 6.398 MB / 0.5137 GB Notification: Performance of prepare postOptimizeDAE: time 1.158e-05/0.605, allocations: 3.406 kB / 0.6945 GB, free: 6.398 MB / 0.5137 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.002784/0.6078, allocations: 1.128 MB / 0.6956 GB, free: 5.848 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.914e-05/0.6078, allocations: 16.22 kB / 0.6956 GB, free: 5.844 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.619e-05/0.6079, allocations: 17.66 kB / 0.6956 GB, free: 5.844 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001025/0.6089, allocations: 270.9 kB / 0.6959 GB, free: 5.773 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 3.223e-05/0.609, allocations: 21.44 kB / 0.6959 GB, free: 5.77 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001697/0.6107, allocations: 129.1 kB / 0.696 GB, free: 5.715 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001274/0.6108, allocations: 50.89 kB / 0.6961 GB, free: 5.703 MB / 0.5137 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 48 * Number of states: 0 () * Number of discrete variables: 6 ($whenCondition1,$PRE.TSet.T_start,TSet.T_start,$PRE.TSet.count,TSet.count,conPI.I.trigger_internal) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (120): * Single equations (assignments): 118 * Array equations: 1 * Algorithm blocks: 1 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.001112/0.6119, allocations: 481.2 kB / 0.6965 GB, free: 5.34 MB / 0.5137 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0005263/0.6124, allocations: 166.7 kB / 0.6967 GB, free: 5.25 MB / 0.5137 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003224/0.6157, allocations: 1.172 MB / 0.6979 GB, free: 4.621 MB / 0.5137 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.644e-05/0.6157, allocations: 14.98 kB / 0.6979 GB, free: 4.613 MB / 0.5137 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 9.127e-06/0.6157, allocations: 5.25 kB / 0.6979 GB, free: 4.609 MB / 0.5137 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.00207/0.6178, allocations: 1.004 MB / 0.6989 GB, free: 3.988 MB / 0.5137 GB 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 0.005919/0.6237, allocations: 2.453 MB / 0.7012 GB, free: 2.379 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.574e-06/0.6238, allocations: 8 kB / 0.7013 GB, free: 2.375 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0007024/0.6245, allocations: 152.3 kB / 0.7014 GB, free: 2.336 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0001961/0.6247, allocations: 33.5 kB / 0.7014 GB, free: 2.316 MB / 0.5137 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 8.509e-05/0.6248, allocations: 32.86 kB / 0.7015 GB, free: 2.293 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001263/0.6261, allocations: 1.361 MB / 0.7028 GB, free: 0.9023 MB / 0.5137 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.184e-06/0.6261, allocations: 3.938 kB / 0.7028 GB, free: 0.8984 MB / 0.5137 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003792/0.6299, allocations: 1.624 MB / 0.7044 GB, free: 12 kB / 0.5137 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001119/0.631, allocations: 357.9 kB / 0.7047 GB, free: 15.71 MB / 0.5294 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0007031/0.6317, allocations: 17.5 kB / 0.7047 GB, free: 15.7 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001528/0.6333, allocations: 110.5 kB / 0.7048 GB, free: 15.65 MB / 0.5294 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001512/0.6334, allocations: 61.66 kB / 0.7049 GB, free: 15.62 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 9.255e-05/0.6335, allocations: 27.61 kB / 0.7049 GB, free: 15.61 MB / 0.5294 GB Notification: Performance of sorting global known variables: time 0.002615/0.6361, allocations: 1.103 MB / 0.706 GB, free: 14.99 MB / 0.5294 GB Notification: Performance of sort global known variables: time 2.6e-07/0.6362, allocations: 0 / 0.706 GB, free: 14.99 MB / 0.5294 GB Notification: Performance of remove unused functions: time 0.004307/0.6405, allocations: 0.8901 MB / 0.7069 GB, free: 14.79 MB / 0.5294 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 6 (vol.dynBal.U,mov.filter.s[1],mov.filter.s[2],conPI.I.y,THeaOut.T,coo.outCon.T) * Number of discrete variables: 3 ($whenCondition1,TSet.T_start,TSet.count) * Number of discrete states: 1 (TSet.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (70): * Single equations (assignments): 61 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 6 * When equations: 2 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 1 {(1,100.0%) 2} * Non-linear torn systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.006286/0.6468, allocations: 2.768 MB / 0.7096 GB, free: 13.16 MB / 0.5294 GB Notification: Performance of simCode: created initialization part: time 0.003889/0.6507, allocations: 1.625 MB / 0.7112 GB, free: 12.04 MB / 0.5294 GB Notification: Performance of simCode: created event and clocks part: time 9.508e-06/0.6507, allocations: 4.5 kB / 0.7112 GB, free: 12.04 MB / 0.5294 GB Notification: Performance of simCode: created simulation system equations: time 0.0013/0.652, allocations: 0.5713 MB / 0.7117 GB, free: 11.45 MB / 0.5294 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.004311/0.6564, allocations: 0.7276 MB / 0.7124 GB, free: 10.73 MB / 0.5294 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02584/0.6822, allocations: 10.84 MB / 0.723 GB, free: 15.11 MB / 0.545 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.00148/0.6838, allocations: 1.368 MB / 0.7244 GB, free: 13.71 MB / 0.545 GB Notification: Performance of simCode: alias equations: time 0.002081/0.6859, allocations: 414.1 kB / 0.7248 GB, free: 13.3 MB / 0.545 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001108/0.687, allocations: 0.7101 MB / 0.7255 GB, free: 12.6 MB / 0.545 GB Notification: Performance of SimCode: time 8.61e-07/0.687, allocations: 0 / 0.7255 GB, free: 12.6 MB / 0.545 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.08274/0.7698, allocations: 46.07 MB / 0.7704 GB, free: 15.09 MB / 0.5919 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0002004/0.77, allocations: 240.8 kB / 0.7707 GB, free: 14.82 MB / 0.5919 GB Notification: Performance of buildModelFMU: Generate platform static: time 2.922/3.692, allocations: 0 / 0.7707 GB, free: 14.82 MB / 0.5919 GB (rm -f IDEAS_dev_IDEAS.Fluid.HeatExchangers.Examples.WaterCooler_T.pipe ; mkfifo IDEAS_dev_IDEAS.Fluid.HeatExchangers.Examples.WaterCooler_T.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Fluid.HeatExchangers.Examples.WaterCooler_T.pipe >> ../files/IDEAS_dev_IDEAS.Fluid.HeatExchangers.Examples.WaterCooler_T.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_IDEAS_dev_IDEAS_Fluid_HeatExchangers_Examples_WaterCooler_T_fmu --startTime=0 --stopTime=172800 --timeout=50 --tolerance=1e-08 IDEAS_dev_IDEAS_Fluid_HeatExchangers_Examples_WaterCooler_T.fmu > IDEAS_dev_IDEAS.Fluid.HeatExchangers.Examples.WaterCooler_T.pipe 2>&1) Environment - environmentSimulation: