Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_IDEAS.Fluid.Actuators.Valves.Examples.TwoWayValveTRV.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/package.mo", uses=false) Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/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.Actuators.Valves.Examples.TwoWayValveTRV,fileNamePrefix="IDEAS_IDEAS_Fluid_Actuators_Valves_Examples_TwoWayValveTRV",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IDEAS.Fluid.Actuators.Valves.Examples.TwoWayValveTRV,fileNamePrefix="IDEAS_IDEAS_Fluid_Actuators_Valves_Examples_TwoWayValveTRV",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 0.001075/0.001075, allocations: 108 kB / 15.6 MB, free: 132 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001026/0.001026, allocations: 191.4 kB / 16.53 MB, free: 6.391 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.298/1.298, allocations: 222.9 MB / 240.2 MB, free: 4.383 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/package.mo): time 0.7382/0.7382, allocations: 132.2 MB / 422.6 MB, free: 1.754 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001223/0.001223, allocations: 63.91 kB / 0.5019 GB, free: 3.742 MB / 366.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3431/0.3444, allocations: 80.21 MB / 0.5802 GB, free: 4.562 MB / 430.1 MB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.Actuators.Valves.Examples.TwoWayValveTRV): time 0.02182/0.3662, allocations: 22.32 MB / 0.602 GB, free: 4.566 MB / 446.1 MB Notification: Performance of NFInst.instExpressions: time 0.007248/0.3735, allocations: 5.232 MB / 0.6071 GB, free: 328 kB / 446.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0004965/0.374, allocations: 20.06 kB / 0.6071 GB, free: 320 kB / 446.1 MB Notification: Performance of NFTyping.typeComponents: time 0.00075/0.3748, allocations: 327.7 kB / 0.6074 GB, free: 36 kB / 446.1 MB Notification: Performance of NFTyping.typeBindings: time 0.001885/0.3767, allocations: 0.8599 MB / 0.6083 GB, free: 15.35 MB / 462.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.001589/0.3783, allocations: 0.7126 MB / 0.609 GB, free: 14.81 MB / 462.1 MB Notification: Performance of NFFlatten.flatten: time 0.001534/0.3799, allocations: 1.478 MB / 0.6104 GB, free: 13.96 MB / 462.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.000636/0.3805, allocations: 0.5272 MB / 0.6109 GB, free: 13.61 MB / 462.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0009268/0.3814, allocations: 0.6181 MB / 0.6115 GB, free: 13.25 MB / 462.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0005779/0.382, allocations: 491.9 kB / 0.612 GB, free: 12.95 MB / 462.1 MB Notification: Performance of NFPackage.collectConstants: time 8.858e-05/0.3821, allocations: 53.25 kB / 0.6121 GB, free: 12.95 MB / 462.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.001045/0.3832, allocations: 0.6314 MB / 0.6127 GB, free: 12.61 MB / 462.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0001627/0.3834, allocations: 159.5 kB / 0.6128 GB, free: 12.48 MB / 462.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0003208/0.3837, allocations: 359.3 kB / 0.6132 GB, free: 12.25 MB / 462.1 MB Notification: Performance of NFConvertDAE.convert: time 0.001145/0.3848, allocations: 1.053 MB / 0.6142 GB, free: 11.53 MB / 462.1 MB Notification: Performance of FrontEnd - DAE generated: time 3.426e-06/0.3849, allocations: 0 / 0.6142 GB, free: 11.53 MB / 462.1 MB Notification: Performance of FrontEnd: time 1.342e-06/0.3849, allocations: 0 / 0.6142 GB, free: 11.53 MB / 462.1 MB Notification: Performance of Transformations before backend: time 8.886e-06/0.3849, allocations: 1.219 kB / 0.6142 GB, free: 11.53 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: 78 * Number of variables: 78 Notification: Performance of Generate backend data structure: time 0.001655/0.3865, allocations: 1.048 MB / 0.6152 GB, free: 10.67 MB / 462.1 MB Notification: Performance of prepare preOptimizeDAE: time 3.583e-05/0.3866, allocations: 14.16 kB / 0.6152 GB, free: 10.67 MB / 462.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 6.983e-05/0.3867, allocations: 69.34 kB / 0.6153 GB, free: 10.6 MB / 462.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001324/0.3868, allocations: 78.81 kB / 0.6154 GB, free: 10.56 MB / 462.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0007741/0.3876, allocations: 0.5521 MB / 0.6159 GB, free: 10.09 MB / 462.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.766e-05/0.3876, allocations: 31.78 kB / 0.6159 GB, free: 10.07 MB / 462.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 6.858e-05/0.3877, allocations: 39.44 kB / 0.616 GB, free: 10.06 MB / 462.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0005678/0.3883, allocations: 311.8 kB / 0.6163 GB, free: 9.883 MB / 462.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 1.099e-05/0.3883, allocations: 0 / 0.6163 GB, free: 9.883 MB / 462.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.915e-05/0.3883, allocations: 10.69 kB / 0.6163 GB, free: 9.875 MB / 462.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.388e-05/0.3884, allocations: 20.19 kB / 0.6163 GB, free: 9.863 MB / 462.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0005539/0.3889, allocations: 254.7 kB / 0.6166 GB, free: 9.746 MB / 462.1 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 0.002351/0.3913, allocations: 1.583 MB / 0.6181 GB, free: 8.402 MB / 462.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.0003535/0.3916, allocations: 185.7 kB / 0.6183 GB, free: 8.301 MB / 462.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001934/0.3918, allocations: 94.72 kB / 0.6184 GB, free: 8.25 MB / 462.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.0003505/0.3922, allocations: 416.5 kB / 0.6188 GB, free: 7.77 MB / 462.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.176e-05/0.3922, allocations: 37 kB / 0.6188 GB, free: 7.727 MB / 462.1 MB Notification: Performance of pre-optimization done (n=19): time 2.705e-06/0.3922, allocations: 0 / 0.6188 GB, free: 7.727 MB / 462.1 MB Notification: Performance of matching and sorting (n=19): time 0.0007741/0.393, allocations: 337.7 kB / 0.6191 GB, free: 7.547 MB / 462.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 3.033e-05/0.3931, allocations: 53.59 kB / 0.6192 GB, free: 7.484 MB / 462.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0007739/0.3938, allocations: 0.6521 MB / 0.6198 GB, free: 7.094 MB / 462.1 MB Notification: Performance of collectPreVariables (initialization): time 3.549e-05/0.3939, allocations: 36.02 kB / 0.6198 GB, free: 7.055 MB / 462.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0002227/0.3941, allocations: 298.4 kB / 0.6201 GB, free: 6.789 MB / 462.1 MB Notification: Performance of collectInitialBindings (initialization): time 6.571e-05/0.3942, allocations: 68.16 kB / 0.6202 GB, free: 6.73 MB / 462.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001446/0.3943, allocations: 100.2 kB / 0.6203 GB, free: 6.664 MB / 462.1 MB Notification: Performance of setup shared object (initialization): time 0.0001465/0.3945, allocations: 372.7 kB / 0.6206 GB, free: 6.305 MB / 462.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0002976/0.3948, allocations: 141.7 kB / 0.6208 GB, free: 6.23 MB / 462.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0003418/0.3952, allocations: 207 kB / 0.621 GB, free: 6.094 MB / 462.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.0005447/0.3957, allocations: 292.4 kB / 0.6213 GB, free: 5.922 MB / 462.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.358e-06/0.3957, allocations: 5.328 kB / 0.6213 GB, free: 5.918 MB / 462.1 MB Notification: Performance of matching and sorting (n=51) (initialization): time 0.0008078/0.3965, allocations: 445 kB / 0.6217 GB, free: 5.695 MB / 462.1 MB Notification: Performance of prepare postOptimizeDAE: time 1.319e-05/0.3966, allocations: 5.5 kB / 0.6217 GB, free: 5.695 MB / 462.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.404e-06/0.3966, allocations: 5.406 kB / 0.6217 GB, free: 5.691 MB / 462.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 1.304e-05/0.3966, allocations: 2.906 kB / 0.6217 GB, free: 5.691 MB / 462.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008064/0.3974, allocations: 150.6 kB / 0.6218 GB, free: 5.645 MB / 462.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0006506/0.3981, allocations: 1.185 MB / 0.623 GB, free: 4.445 MB / 462.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004352/0.3985, allocations: 55.56 kB / 0.623 GB, free: 4.406 MB / 462.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.972e-05/0.3986, allocations: 20.23 kB / 0.6231 GB, free: 4.398 MB / 462.1 MB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.000416/0.399, allocations: 275.3 kB / 0.6233 GB, free: 4.215 MB / 462.1 MB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0003321/0.3993, allocations: 203.1 kB / 0.6235 GB, free: 4.082 MB / 462.1 MB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.000505/0.3998, allocations: 278.2 kB / 0.6238 GB, free: 3.922 MB / 462.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.643e-06/0.3998, allocations: 0 / 0.6238 GB, free: 3.922 MB / 462.1 MB Notification: Performance of matching and sorting (n=51) (initialization_lambda0): time 0.0007944/0.4006, allocations: 448 kB / 0.6242 GB, free: 3.691 MB / 462.1 MB Notification: Performance of prepare postOptimizeDAE: time 8.135e-06/0.4007, allocations: 5.438 kB / 0.6242 GB, free: 3.691 MB / 462.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.915e-06/0.4007, allocations: 2.344 kB / 0.6242 GB, free: 3.691 MB / 462.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 3.958e-06/0.4007, allocations: 2.312 kB / 0.6242 GB, free: 3.691 MB / 462.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000471/0.4012, allocations: 112.2 kB / 0.6243 GB, free: 3.664 MB / 462.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 4.619e-06/0.4012, allocations: 3.156 kB / 0.6243 GB, free: 3.664 MB / 462.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003881/0.4016, allocations: 42.33 kB / 0.6244 GB, free: 3.637 MB / 462.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.485e-05/0.4016, allocations: 19.08 kB / 0.6244 GB, free: 3.629 MB / 462.1 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 5 * 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 (51): * Single equations (assignments): 49 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 2 * Torn equation systems: 0 * 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): 2 systems {1, 1} * Without analytic Jacobian (size): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0001301/0.4018, allocations: 206.3 kB / 0.6246 GB, free: 3.426 MB / 462.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 9.931e-05/0.4019, allocations: 59.09 kB / 0.6246 GB, free: 3.395 MB / 462.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0006616/0.4025, allocations: 316.5 kB / 0.6249 GB, free: 3.074 MB / 462.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.435e-06/0.4025, allocations: 7.938 kB / 0.625 GB, free: 3.066 MB / 462.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.027e-06/0.4026, allocations: 0 / 0.625 GB, free: 3.066 MB / 462.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.552e-06/0.4026, allocations: 3.984 kB / 0.625 GB, free: 3.062 MB / 462.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001212/0.4038, allocations: 0.9093 MB / 0.6258 GB, free: 2.086 MB / 462.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.272e-06/0.4038, allocations: 12 kB / 0.6259 GB, free: 2.074 MB / 462.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002799/0.4041, allocations: 55.94 kB / 0.6259 GB, free: 2.02 MB / 462.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 2.785e-06/0.4041, allocations: 0 / 0.6259 GB, free: 2.02 MB / 462.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.468e-05/0.4041, allocations: 11.94 kB / 0.6259 GB, free: 2.008 MB / 462.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0005496/0.4047, allocations: 1.184 MB / 0.6271 GB, free: 0.7773 MB / 462.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.589e-06/0.4047, allocations: 7.922 kB / 0.6271 GB, free: 0.7695 MB / 462.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0007783/0.4055, allocations: 0.5018 MB / 0.6276 GB, free: 244 kB / 462.1 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0001758/0.4057, allocations: 172.3 kB / 0.6277 GB, free: 52 kB / 462.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 8.421e-05/0.4058, allocations: 11.98 kB / 0.6278 GB, free: 40 kB / 462.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0002954/0.4061, allocations: 15.98 kB / 0.6278 GB, free: 24 kB / 462.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 5.248e-05/0.4061, allocations: 11.98 kB / 0.6278 GB, free: 12 kB / 462.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.779e-05/0.4061, allocations: 12.06 kB / 0.6278 GB, free: 0 / 462.1 MB Notification: Performance of sorting global known variables: time 0.0005382/0.4067, allocations: 455 kB / 0.6282 GB, free: 15.56 MB / 478.1 MB Notification: Performance of sort global known variables: time 1.8e-07/0.4067, allocations: 3.938 kB / 0.6282 GB, free: 15.55 MB / 478.1 MB Notification: Performance of remove unused functions: time 0.0007978/0.4075, allocations: 303.5 kB / 0.6285 GB, free: 15.26 MB / 478.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * Number of states: 2 (valDyn.val.filter.s[1],valDyn.val.filter.s[2]) * 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 (21): * Single equations (assignments): 17 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 2 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 2 * Torn equation systems: 0 * 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): 2 systems {1, 1} * Without analytic Jacobian (size): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.001432/0.4089, allocations: 1.193 MB / 0.6297 GB, free: 14.04 MB / 478.1 MB Notification: Performance of simCode: created initialization part: time 0.00136/0.4103, allocations: 0.5239 MB / 0.6302 GB, free: 13.52 MB / 478.1 MB Notification: Performance of simCode: created event and clocks part: time 2.264e-06/0.4103, allocations: 3.938 kB / 0.6302 GB, free: 13.51 MB / 478.1 MB Notification: Performance of simCode: created simulation system equations: time 0.0003314/0.4107, allocations: 136.3 kB / 0.6303 GB, free: 13.38 MB / 478.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001242/0.4119, allocations: 280.5 kB / 0.6306 GB, free: 13.12 MB / 478.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.006055/0.418, allocations: 4.872 MB / 0.6354 GB, free: 8.133 MB / 478.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004132/0.4184, allocations: 0.8864 MB / 0.6362 GB, free: 7.219 MB / 478.1 MB Notification: Performance of simCode: alias equations: time 0.0004557/0.4189, allocations: 116.8 kB / 0.6363 GB, free: 7.102 MB / 478.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002711/0.4192, allocations: 231.4 kB / 0.6366 GB, free: 6.875 MB / 478.1 MB Notification: Performance of SimCode: time 2.31e-07/0.4192, allocations: 0 / 0.6366 GB, free: 6.875 MB / 478.1 MB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.03945/0.4586, allocations: 17.03 MB / 0.6532 GB, free: 6.176 MB / 494.1 MB Notification: Performance of buildModelFMU: Generate platform static: time 10.64/11.1, allocations: 20.53 kB / 0.6532 GB, free: 6.168 MB / 494.1 MB (rm -f IDEAS_IDEAS.Fluid.Actuators.Valves.Examples.TwoWayValveTRV.pipe ; mkfifo IDEAS_IDEAS.Fluid.Actuators.Valves.Examples.TwoWayValveTRV.pipe ; head -c 1048576 < IDEAS_IDEAS.Fluid.Actuators.Valves.Examples.TwoWayValveTRV.pipe >> ../files/IDEAS_IDEAS.Fluid.Actuators.Valves.Examples.TwoWayValveTRV.sim & python3 -m fmpy simulate --output-file IDEAS_IDEAS.Fluid.Actuators.Valves.Examples.TwoWayValveTRV_res.csv --start-time 0 --stop-time 7200 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 2.88 IDEAS_IDEAS_Fluid_Actuators_Valves_Examples_TwoWayValveTRV.fmu > IDEAS_IDEAS.Fluid.Actuators.Valves.Examples.TwoWayValveTRV.pipe 2>&1)