Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Vessels.TestTankWithTopPorts.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/ModelicaTest 3.2.1+maint.om/package.mo", uses=false) Using package ModelicaTest with version 3.2.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.1+maint.om/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(ModelicaTest.Fluid.TestComponents.Vessels.TestTankWithTopPorts,tolerance=1e-05,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Vessels.TestTankWithTopPorts") translateModel(ModelicaTest.Fluid.TestComponents.Vessels.TestTankWithTopPorts,tolerance=1e-05,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Vessels.TestTankWithTopPorts") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0007942/0.0007942, allocations: 97.64 kB / 15.36 MB, free: 0.7344 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.005241/0.005241, allocations: 171.4 kB / 16.27 MB, free: 6.32 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.315/1.315, allocations: 205.4 MB / 222.5 MB, free: 5.531 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.1+maint.om/package.mo): time 0.2894/0.2894, allocations: 38.03 MB / 308.8 MB, free: 10.36 MB / 254.1 MB 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: ModelicaTest requested package Modelica of version 3.2.1. Modelica 3.2.3 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.0005265/0.0005265, allocations: 12 kB / 377 MB, free: 14.84 MB / 318.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.09989/0.1004, allocations: 57.53 MB / 434.6 MB, free: 5.207 MB / 366.1 MB Notification: Performance of NFInst.instantiate(ModelicaTest.Fluid.TestComponents.Vessels.TestTankWithTopPorts): time 0.2523/0.3528, allocations: 59.42 MB / 494 MB, free: 19.59 MB / 382.1 MB Notification: Performance of NFInst.instExpressions: time 0.01735/0.3702, allocations: 17.25 MB / 0.4993 GB, free: 7.434 MB / 382.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.001379/0.3716, allocations: 28.06 kB / 0.4993 GB, free: 7.418 MB / 382.1 MB Notification: Performance of NFTyping.typeComponents: time 0.001232/0.3729, allocations: 381.1 kB / 0.4997 GB, free: 7.211 MB / 382.1 MB Notification: Performance of NFTyping.typeBindings: time 0.01256/0.3854, allocations: 4.041 MB / 0.5036 GB, free: 5.363 MB / 382.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.005865/0.3913, allocations: 2.029 MB / 0.5056 GB, free: 4.246 MB / 382.1 MB Notification: Performance of NFFlatten.flatten: time 0.004619/0.396, allocations: 3.892 MB / 0.5094 GB, free: 2.945 MB / 382.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.001267/0.3972, allocations: 0.7482 MB / 0.5101 GB, free: 2.664 MB / 382.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.005414/0.4027, allocations: 2.539 MB / 0.5126 GB, free: 1.562 MB / 382.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.00521/0.4079, allocations: 2.433 MB / 0.515 GB, free: 0.5078 MB / 382.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0002489/0.4082, allocations: 58.12 kB / 0.515 GB, free: 0.5039 MB / 382.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.01503/0.4232, allocations: 7.207 MB / 0.5221 GB, free: 14.2 MB / 398.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0006057/0.4239, allocations: 276.8 kB / 0.5223 GB, free: 14.01 MB / 398.1 MB Notification: Performance of NFVerifyModel.verify: time 0.001143/0.425, allocations: 0.5639 MB / 0.5229 GB, free: 13.66 MB / 398.1 MB Notification: Performance of NFConvertDAE.convert: time 0.01297/0.438, allocations: 5.382 MB / 0.5281 GB, free: 10.21 MB / 398.1 MB Notification: Performance of FrontEnd - DAE generated: time 7.635e-06/0.4381, allocations: 7.922 kB / 0.5281 GB, free: 10.21 MB / 398.1 MB Notification: Performance of FrontEnd: time 2.455e-06/0.4381, allocations: 0 / 0.5281 GB, free: 10.21 MB / 398.1 MB Notification: Performance of Transformations before backend: time 2.177e-05/0.4381, allocations: 4 kB / 0.5282 GB, free: 10.2 MB / 398.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 212 * Number of variables: 212 Notification: Performance of Generate backend data structure: time 0.005751/0.4439, allocations: 1.694 MB / 0.5298 GB, free: 9.043 MB / 398.1 MB Notification: Performance of prepare preOptimizeDAE: time 5.58e-05/0.4439, allocations: 9.625 kB / 0.5298 GB, free: 9.043 MB / 398.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002189/0.4461, allocations: 328.2 kB / 0.5301 GB, free: 8.91 MB / 398.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001055/0.4472, allocations: 0.6421 MB / 0.5308 GB, free: 8.402 MB / 398.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.000215/0.4474, allocations: 300.4 kB / 0.531 GB, free: 8.109 MB / 398.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001477/0.4476, allocations: 84.22 kB / 0.5311 GB, free: 8.078 MB / 398.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002872/0.4505, allocations: 1.545 MB / 0.5326 GB, free: 7.105 MB / 398.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.584e-05/0.4505, allocations: 4 kB / 0.5326 GB, free: 7.102 MB / 398.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001001/0.4506, allocations: 44.23 kB / 0.5327 GB, free: 7.07 MB / 398.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 4.309e-05/0.4507, allocations: 38.89 kB / 0.5327 GB, free: 7.062 MB / 398.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002807/0.4535, allocations: 1.387 MB / 0.5341 GB, free: 6.41 MB / 398.1 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 0.007386/0.4609, allocations: 6.441 MB / 0.5404 GB, free: 52 kB / 398.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.002665/0.4636, allocations: 1.011 MB / 0.5413 GB, free: 15.02 MB / 414.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0008368/0.4644, allocations: 467.1 kB / 0.5418 GB, free: 14.56 MB / 414.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.03044/0.4949, allocations: 15.81 MB / 0.5572 GB, free: 12.89 MB / 430.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 7.173e-05/0.495, allocations: 39.12 kB / 0.5573 GB, free: 12.85 MB / 430.1 MB Notification: Performance of pre-optimization done (n=59): time 3.547e-06/0.495, allocations: 0 / 0.5573 GB, free: 12.85 MB / 430.1 MB Notification: Performance of matching and sorting (n=64): time 0.00844/0.5034, allocations: 3.063 MB / 0.5603 GB, free: 9.73 MB / 430.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001044/0.5036, allocations: 166.8 kB / 0.5604 GB, free: 9.531 MB / 430.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001042/0.5046, allocations: 0.8168 MB / 0.5612 GB, free: 8.703 MB / 430.1 MB Notification: Performance of collectPreVariables (initialization): time 8.672e-05/0.5047, allocations: 57.62 kB / 0.5613 GB, free: 8.641 MB / 430.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0003339/0.5051, allocations: 435.5 kB / 0.5617 GB, free: 8.211 MB / 430.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0001737/0.5053, allocations: 213 kB / 0.5619 GB, free: 8 MB / 430.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001115/0.5054, allocations: 81.67 kB / 0.562 GB, free: 7.914 MB / 430.1 MB Notification: Performance of setup shared object (initialization): time 0.0001858/0.5056, allocations: 398.7 kB / 0.5624 GB, free: 7.516 MB / 430.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0009038/0.5065, allocations: 453.7 kB / 0.5628 GB, free: 7.07 MB / 430.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.00117/0.5077, allocations: 0.6883 MB / 0.5635 GB, free: 6.289 MB / 430.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.001845/0.5095, allocations: 0.9999 MB / 0.5644 GB, free: 5.203 MB / 430.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.839e-06/0.5095, allocations: 4 kB / 0.5644 GB, free: 5.199 MB / 430.1 MB Notification: Performance of matching and sorting (n=108) (initialization): time 0.002568/0.5121, allocations: 1.25 MB / 0.5657 GB, free: 3.938 MB / 430.1 MB Notification: Performance of prepare postOptimizeDAE: time 2.84e-05/0.5121, allocations: 8 kB / 0.5657 GB, free: 3.93 MB / 430.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.503e-05/0.5122, allocations: 8.75 kB / 0.5657 GB, free: 3.922 MB / 430.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.0003775/0.5125, allocations: 96.83 kB / 0.5658 GB, free: 3.824 MB / 430.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.00315/0.5157, allocations: 351.4 kB / 0.5661 GB, free: 3.48 MB / 430.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.005184/0.5209, allocations: 6.368 MB / 0.5723 GB, free: 12.57 MB / 446.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001097/0.522, allocations: 139.9 kB / 0.5725 GB, free: 12.43 MB / 446.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.076e-05/0.5221, allocations: 43.98 kB / 0.5725 GB, free: 12.39 MB / 446.1 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 28 * Number of states: 0 () * Number of discrete variables: 21 (Boundary_fixed.medium.phase,massFlowRate[2].medium.phase,massFlowRate[1].medium.phase,tank.aboveLevel[4],$PRE.tank.aboveLevel[4],tank.aboveLevel[3],$PRE.tank.aboveLevel[3],tank.aboveLevel[2],$PRE.tank.aboveLevel[2],tank.aboveLevel[1],$PRE.tank.aboveLevel[1],tank.ports_m_flow_out[4],$PRE.tank.ports_m_flow_out[4],tank.ports_m_flow_out[3],$PRE.tank.ports_m_flow_out[3],tank.ports_m_flow_out[2],$PRE.tank.ports_m_flow_out[2],tank.ports_m_flow_out[1],$PRE.tank.ports_m_flow_out[1],tank.heatTransfer.states[1].phase,Boundary_fixed.state.phase) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (103): * Single equations (assignments): 98 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 4 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 4 systems {1, 1, 1, 1} * Without analytic Jacobian (size): 0 systems Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,5)} Notification: Performance of prepare postOptimizeDAE: time 0.0005659/0.5227, allocations: 339.6 kB / 0.5728 GB, free: 12.05 MB / 446.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001533/0.5229, allocations: 86.97 kB / 0.5729 GB, free: 11.96 MB / 446.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003151/0.526, allocations: 2.231 MB / 0.5751 GB, free: 9.703 MB / 446.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.016e-05/0.526, allocations: 23.97 kB / 0.5751 GB, free: 9.68 MB / 446.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.189e-06/0.5261, allocations: 0 / 0.5751 GB, free: 9.68 MB / 446.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.061e-05/0.5261, allocations: 8.547 kB / 0.5751 GB, free: 9.672 MB / 446.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.004988/0.5311, allocations: 3.521 MB / 0.5785 GB, free: 6.086 MB / 446.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 5.821e-06/0.5311, allocations: 128 / 0.5785 GB, free: 6.086 MB / 446.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.003012/0.5341, allocations: 307.5 kB / 0.5788 GB, free: 5.785 MB / 446.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.000367/0.5345, allocations: 105.6 kB / 0.5789 GB, free: 5.68 MB / 446.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.224e-05/0.5346, allocations: 19.98 kB / 0.579 GB, free: 5.66 MB / 446.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.005113/0.5397, allocations: 6.363 MB / 0.5852 GB, free: 14.75 MB / 462.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.618e-06/0.5397, allocations: 4.062 kB / 0.5852 GB, free: 14.75 MB / 462.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003472/0.5432, allocations: 2.219 MB / 0.5873 GB, free: 12.49 MB / 462.1 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0005705/0.5438, allocations: 342.7 kB / 0.5877 GB, free: 12.14 MB / 462.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001711/0.544, allocations: 27.98 kB / 0.5877 GB, free: 12.11 MB / 462.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0008362/0.5448, allocations: 115.9 kB / 0.5878 GB, free: 12 MB / 462.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0002619/0.5451, allocations: 124.2 kB / 0.5879 GB, free: 11.87 MB / 462.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.902e-05/0.5452, allocations: 27.92 kB / 0.588 GB, free: 11.84 MB / 462.1 MB Notification: Performance of sorting global known variables: time 0.001161/0.5463, allocations: 0.8922 MB / 0.5888 GB, free: 10.95 MB / 462.1 MB Notification: Performance of sort global known variables: time 1.71e-07/0.5463, allocations: 0 / 0.5888 GB, free: 10.95 MB / 462.1 MB Notification: Performance of remove unused functions: time 0.004653/0.551, allocations: 1.23 MB / 0.59 GB, free: 9.715 MB / 462.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 6 * Number of states: 2 (tank.level,tank.medium.h) * Number of discrete variables: 20 ($cse3.phase,$cse3.region,$cse7.phase,$cse7.region,$cse11.phase,$cse11.region,$cse12.phase,$cse12.region,tank.heatTransfer.states[1].phase,tank.ports_m_flow_out[1],tank.ports_m_flow_out[2],tank.ports_m_flow_out[3],tank.ports_m_flow_out[4],tank.aboveLevel[1],tank.aboveLevel[2],tank.aboveLevel[3],tank.aboveLevel[4],massFlowRate[1].medium.phase,massFlowRate[2].medium.phase,Boundary_fixed.medium.phase) * Number of discrete states: 8 (tank.aboveLevel[1],tank.ports_m_flow_out[1],tank.aboveLevel[2],tank.ports_m_flow_out[2],tank.aboveLevel[3],tank.ports_m_flow_out[3],tank.aboveLevel[4],tank.ports_m_flow_out[4]) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (63): * Single equations (assignments): 54 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 4 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 4 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 4 systems {1, 1, 1, 1} * Without analytic Jacobian (size): 0 systems Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(2,4)} Notification: Performance of Backend phase and start with SimCode phase: time 0.005313/0.5563, allocations: 1.288 MB / 0.5913 GB, free: 8.422 MB / 462.1 MB Notification: Performance of simCode: created initialization part: time 0.004572/0.5609, allocations: 1.305 MB / 0.5926 GB, free: 7.125 MB / 462.1 MB Notification: Performance of simCode: created event and clocks part: time 5.029e-06/0.5609, allocations: 0 / 0.5926 GB, free: 7.125 MB / 462.1 MB Notification: Performance of simCode: created simulation system equations: time 0.003521/0.5645, allocations: 0.9213 MB / 0.5935 GB, free: 6.203 MB / 462.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003059/0.5675, allocations: 0.5244 MB / 0.594 GB, free: 5.672 MB / 462.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.00414/0.5717, allocations: 3.082 MB / 0.597 GB, free: 2.547 MB / 462.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007199/0.5724, allocations: 1.226 MB / 0.5982 GB, free: 1.293 MB / 462.1 MB Notification: Performance of simCode: alias equations: time 0.001144/0.5736, allocations: 0.5107 MB / 0.5987 GB, free: 0.7812 MB / 462.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002338/0.5738, allocations: 79.42 kB / 0.5988 GB, free: 0.7031 MB / 462.1 MB Notification: Performance of SimCode: time 1.713e-06/0.5738, allocations: 0 / 0.5988 GB, free: 0.7031 MB / 462.1 MB Notification: Performance of Templates: time 0.2795/0.8533, allocations: 53.64 MB / 0.6511 GB, free: 149.9 MB / 494.1 MB make -j1 -f ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Vessels.TestTankWithTopPorts.makefile Environment - environmentSimulation: (rm -f ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Vessels.TestTankWithTopPorts.pipe ; mkfifo ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Vessels.TestTankWithTopPorts.pipe ; head -c 1048576 < ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Vessels.TestTankWithTopPorts.pipe >> ../files/ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Vessels.TestTankWithTopPorts.sim & ./ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Vessels.TestTankWithTopPorts -abortSlowSimulation -alarm=480 -lv LOG_STATS > ModelicaTest_3.2.1_ModelicaTest.Fluid.TestComponents.Vessels.TestTankWithTopPorts.pipe 2>&1) Environment - environmentSimulation: