Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr ModelicaTest_4.1.0-beta.om_ModelicaTest.MultiBody.Sensors.CutForceAndTorque2.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica trunk/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 4.1.0-beta.om/package.mo", uses=false) Using package ModelicaTest with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 4.1.0-beta.om/package.mo) Using package Modelica with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica trunk/package.mo) Using package Complex with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo) Using package ModelicaServices with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo) Running command: "" <> buildModelFMU(ModelicaTest.MultiBody.Sensors.CutForceAndTorque2,fileNamePrefix="ModelicaTest_4_1_0-beta_om_ModelicaTest_MultiBody_Sensors_CutForceAndTorque2",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(ModelicaTest.MultiBody.Sensors.CutForceAndTorque2,fileNamePrefix="ModelicaTest_4_1_0-beta_om_ModelicaTest_MultiBody_Sensors_CutForceAndTorque2",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo): time 0.001643/0.001643, allocations: 118.2 kB / 17.79 MB, free: 5.258 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo): time 0.001964/0.001964, allocations: 206 kB / 18.74 MB, free: 4.312 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica trunk/package.mo): time 1.485/1.485, allocations: 227.4 MB / 247 MB, free: 10.41 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 4.1.0-beta.om/package.mo): time 0.2628/0.2628, allocations: 46.11 MB / 344.3 MB, free: 11.47 MB / 286.1 MB Warning: Requested package Modelica of version 4.1.0, but this package was already loaded with version trunk. OpenModelica cannot reason about compatibility between the two packages since they are not semantic versions. Notification: Performance of FrontEnd - loaded program: time 0.002545/0.002545, allocations: 79.86 kB / 480.9 MB, free: 4.531 MB / 350.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3801/0.3827, allocations: 62.44 MB / 0.5306 GB, free: 13.38 MB / 398.1 MB Notification: Performance of NFInst.instantiate(ModelicaTest.MultiBody.Sensors.CutForceAndTorque2): time 0.02099/0.4037, allocations: 16.28 MB / 0.5465 GB, free: 0.6055 MB / 398.1 MB Notification: Performance of NFInst.instExpressions: time 0.01465/0.4184, allocations: 5.391 MB / 0.5518 GB, free: 12.01 MB / 414.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.004643/0.4231, allocations: 127.7 kB / 0.5519 GB, free: 11.88 MB / 414.1 MB Notification: Performance of NFTyping.typeComponents: time 0.01516/0.4383, allocations: 7.45 MB / 0.5592 GB, free: 4.41 MB / 414.1 MB Notification: Performance of NFTyping.typeBindings: time 0.009097/0.4475, allocations: 2.922 MB / 0.562 GB, free: 1.477 MB / 414.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.004709/0.4522, allocations: 1.712 MB / 0.5637 GB, free: 15.76 MB / 430.1 MB Notification: Performance of NFFlatten.flatten: time 0.01524/0.4675, allocations: 8.408 MB / 0.5719 GB, free: 7.34 MB / 430.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.01363/0.4812, allocations: 8.9 MB / 0.5806 GB, free: 14.34 MB / 446.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.006838/0.488, allocations: 3.401 MB / 0.5839 GB, free: 10.93 MB / 446.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.008085/0.4962, allocations: 4.354 MB / 0.5882 GB, free: 6.562 MB / 446.1 MB Notification: Performance of NFPackage.collectConstants: time 0.00291/0.4991, allocations: 0.707 MB / 0.5888 GB, free: 5.855 MB / 446.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.005063/0.5042, allocations: 1.514 MB / 0.5903 GB, free: 4.34 MB / 446.1 MB Notification: Performance of NFScalarize.scalarize: time 0.00657/0.5108, allocations: 4.017 MB / 0.5943 GB, free: 320 kB / 446.1 MB Notification: Performance of NFVerifyModel.verify: time 0.009295/0.5201, allocations: 4.478 MB / 0.5986 GB, free: 11.8 MB / 462.1 MB Notification: Performance of NFConvertDAE.convert: time 0.02256/0.5427, allocations: 13.68 MB / 0.612 GB, free: 14.07 MB / 478.1 MB Notification: Performance of FrontEnd - DAE generated: time 7.444e-06/0.5428, allocations: 0 / 0.612 GB, free: 14.07 MB / 478.1 MB Notification: Performance of FrontEnd: time 2.415e-06/0.5428, allocations: 4 kB / 0.612 GB, free: 14.07 MB / 478.1 MB Notification: Performance of Transformations before backend: time 0.0006456/0.5435, allocations: 0 / 0.612 GB, free: 14.07 MB / 478.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 2873 * Number of variables: 2873 Notification: Performance of Generate backend data structure: time 0.02746/0.571, allocations: 9.857 MB / 0.6216 GB, free: 4.105 MB / 478.1 MB Notification: Performance of prepare preOptimizeDAE: time 5.106e-05/0.571, allocations: 8.031 kB / 0.6216 GB, free: 4.098 MB / 478.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.004472/0.5755, allocations: 1.359 MB / 0.6229 GB, free: 2.73 MB / 478.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01219/0.5877, allocations: 2.694 MB / 0.6256 GB, free: 28 kB / 478.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.01306/0.6008, allocations: 5.848 MB / 0.6313 GB, free: 10.1 MB / 494.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0005499/0.6014, allocations: 0.4969 MB / 0.6318 GB, free: 9.602 MB / 494.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.002617/0.604, allocations: 0.652 MB / 0.6324 GB, free: 8.949 MB / 494.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.04905/0.6531, allocations: 19.6 MB / 0.6516 GB, free: 4.172 MB / 0.4981 GB Notification: Performance of preOpt findStateOrder (simulation): time 0.0004564/0.6536, allocations: 67.41 kB / 0.6516 GB, free: 4.105 MB / 0.4981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.002685/0.6563, allocations: 311.8 kB / 0.6519 GB, free: 3.801 MB / 0.4981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.00599/0.6624, allocations: 3.305 MB / 0.6551 GB, free: 496 kB / 0.4981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.03964/0.7021, allocations: 15 MB / 0.6698 GB, free: 1.461 MB / 0.5138 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.7013/1.403, allocations: 71.29 MB / 0.7394 GB, free: 114.8 MB / 0.5607 GB Notification: Performance of preOpt comSubExp (simulation): time 0.01841/1.422, allocations: 6.444 MB / 0.7457 GB, free: 114.1 MB / 0.5607 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.003474/1.425, allocations: 2.361 MB / 0.748 GB, free: 113.3 MB / 0.5607 GB Notification: Performance of preOpt evalFunc (simulation): time 0.02036/1.446, allocations: 10.83 MB / 0.7586 GB, free: 107.3 MB / 0.5607 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.262e-05/1.446, allocations: 58.59 kB / 0.7586 GB, free: 107.3 MB / 0.5607 GB Notification: Performance of pre-optimization done (n=212): time 6.242e-06/1.446, allocations: 0 / 0.7586 GB, free: 107.3 MB / 0.5607 GB Notification: Performance of matching and sorting (n=236): time 0.04579/1.492, allocations: 16.91 MB / 0.7751 GB, free: 96.55 MB / 0.5607 GB Notification: Performance of inlineWhenForInitialization (initialization): time 6.385e-05/1.492, allocations: 152.9 kB / 0.7753 GB, free: 96.38 MB / 0.5607 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.01051/1.502, allocations: 6.671 MB / 0.7818 GB, free: 89.84 MB / 0.5607 GB Notification: Performance of collectPreVariables (initialization): time 0.0004763/1.503, allocations: 60.2 kB / 0.7819 GB, free: 89.78 MB / 0.5607 GB Notification: Performance of collectInitialEqns (initialization): time 0.003438/1.506, allocations: 5.879 MB / 0.7876 GB, free: 84.38 MB / 0.5607 GB Notification: Performance of collectInitialBindings (initialization): time 0.0009733/1.507, allocations: 0.9641 MB / 0.7885 GB, free: 83.43 MB / 0.5607 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.002648/1.51, allocations: 1.813 MB / 0.7903 GB, free: 81.61 MB / 0.5607 GB Notification: Performance of setup shared object (initialization): time 5.2e-05/1.51, allocations: 305.1 kB / 0.7906 GB, free: 81.3 MB / 0.5607 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.00355/1.514, allocations: 2.51 MB / 0.7931 GB, free: 78.79 MB / 0.5607 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.006487/1.52, allocations: 8.199 MB / 0.8011 GB, free: 67.9 MB / 0.5607 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.01055/1.531, allocations: 11.67 MB / 0.8125 GB, free: 53.57 MB / 0.5607 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 0.0001896/1.531, allocations: 60 kB / 0.8125 GB, free: 53.52 MB / 0.5607 GB Notification: Performance of matching and sorting (n=1177) (initialization): time 0.01896/1.55, allocations: 10.38 MB / 0.8227 GB, free: 43.14 MB / 0.5607 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001615/1.55, allocations: 92 kB / 0.8227 GB, free: 43.05 MB / 0.5607 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0002495/1.55, allocations: 200.9 kB / 0.8229 GB, free: 42.86 MB / 0.5607 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0002016/1.551, allocations: 268.8 kB / 0.8232 GB, free: 42.6 MB / 0.5607 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.006389/1.557, allocations: 2.055 MB / 0.8252 GB, free: 40.54 MB / 0.5607 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0002943/1.557, allocations: 394.5 kB / 0.8256 GB, free: 40.15 MB / 0.5607 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.007129/1.564, allocations: 427.6 kB / 0.826 GB, free: 39.73 MB / 0.5607 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.001575/1.566, allocations: 0.5545 MB / 0.8265 GB, free: 39.18 MB / 0.5607 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 923 * Number of states: 0 () * Number of discrete variables: 88 (cutForce2b.torqueArrow.twoHeadedArrow,cutForce2b.torqueArrow.headAtOrigin,cutForce2b.forceArrow.twoHeadedArrow,cutForce2b.forceArrow.headAtOrigin,cutForce1b.torqueArrow.twoHeadedArrow,cutForce1b.torqueArrow.headAtOrigin,cutForce1b.forceArrow.twoHeadedArrow,cutForce1b.forceArrow.headAtOrigin,cutForce2a.torqueArrow.twoHeadedArrow,cutForce2a.torqueArrow.headAtOrigin,cutForce2a.forceArrow.twoHeadedArrow,cutForce2a.forceArrow.headAtOrigin,cutForce1a.torqueArrow.twoHeadedArrow,cutForce1a.torqueArrow.headAtOrigin,cutForce1a.forceArrow.twoHeadedArrow,cutForce1a.forceArrow.headAtOrigin,rotate2b.color[3],rotate2b.color[2],rotate2b.color[1],body2b.sphereColor[3],body2b.sphereColor[2],body2b.sphereColor[1],translate2b.color[3],translate2b.color[2],translate2b.color[1],cutForce2b.torqueColor[3],cutForce2b.torqueColor[2],cutForce2b.torqueColor[1],cutForce2b.forceColor[3],cutForce2b.forceColor[2],cutForce2b.forceColor[1],rotate1b.color[3],rotate1b.color[2],rotate1b.color[1],body1b.sphereColor[3],body1b.sphereColor[2],body1b.sphereColor[1],translate1b.color[3],translate1b.color[2],translate1b.color[1],cutForce1b.torqueColor[3],cutForce1b.torqueColor[2],cutForce1b.torqueColor[1],cutForce1b.forceColor[3],cutForce1b.forceColor[2],cutForce1b.forceColor[1],rotate2a.color[3],rotate2a.color[2],rotate2a.color[1],rotate1a.color[3],rotate1a.color[2],rotate1a.color[1],body2a.sphereColor[3],body2a.sphereColor[2],body2a.sphereColor[1],translate2a.color[3],translate2a.color[2],translate2a.color[1],cutForce2a.torqueColor[3],cutForce2a.torqueColor[2],cutForce2a.torqueColor[1],cutForce2a.forceColor[3],cutForce2a.forceColor[2],cutForce2a.forceColor[1],body1a.sphereColor[3],body1a.sphereColor[2],body1a.sphereColor[1],translate1a.color[3],translate1a.color[2],translate1a.color[1],cutForce1a.torqueColor[3],cutForce1a.torqueColor[2],cutForce1a.torqueColor[1],cutForce1a.forceColor[3],cutForce1a.forceColor[2],cutForce1a.forceColor[1],world.gravityArrowColor[3],world.gravityArrowColor[2],world.gravityArrowColor[1],world.axisColor_x[3],world.axisColor_x[2],world.axisColor_x[1],world.groundColor[3],world.groundColor[2],world.groundColor[1],world.gravitySphereColor[3],world.gravitySphereColor[2],world.gravitySphereColor[1]) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (1113): * Single equations (assignments): 1102 * Array equations: 11 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.00681/1.573, allocations: 3.734 MB / 0.8302 GB, free: 35.43 MB / 0.5607 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001362/1.574, allocations: 0.5937 MB / 0.8307 GB, free: 34.83 MB / 0.5607 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002083/1.576, allocations: 0.6749 MB / 0.8314 GB, free: 34.14 MB / 0.5607 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.761e-05/1.576, allocations: 24 kB / 0.8314 GB, free: 34.12 MB / 0.5607 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.264e-05/1.576, allocations: 4 kB / 0.8314 GB, free: 34.12 MB / 0.5607 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 2.247e-05/1.577, allocations: 15.95 kB / 0.8314 GB, free: 34.1 MB / 0.5607 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.02888/1.605, allocations: 19.24 MB / 0.8502 GB, free: 14.07 MB / 0.5607 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 9.033e-05/1.606, allocations: 60.25 kB / 0.8503 GB, free: 14.01 MB / 0.5607 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001513/1.607, allocations: 0.5302 MB / 0.8508 GB, free: 13.48 MB / 0.5607 GB Notification: Performance of postOpt tearingSystem (simulation): time 5.085e-05/1.607, allocations: 72 kB / 0.8509 GB, free: 13.41 MB / 0.5607 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0002219/1.607, allocations: 124 kB / 0.851 GB, free: 13.29 MB / 0.5607 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 4.977e-05/1.607, allocations: 107.6 kB / 0.8511 GB, free: 13.18 MB / 0.5607 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.612e-05/1.607, allocations: 87.62 kB / 0.8512 GB, free: 13.09 MB / 0.5607 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.004831/1.612, allocations: 5.045 MB / 0.8561 GB, free: 7.16 MB / 0.5607 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001655/1.614, allocations: 0.6999 MB / 0.8568 GB, free: 6.438 MB / 0.5607 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0009771/1.615, allocations: 128 kB / 0.8569 GB, free: 6.312 MB / 0.5607 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002604/1.618, allocations: 139.9 kB / 0.8571 GB, free: 6.176 MB / 0.5607 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0004001/1.618, allocations: 374.7 kB / 0.8574 GB, free: 5.809 MB / 0.5607 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001765/1.618, allocations: 151.4 kB / 0.8576 GB, free: 5.664 MB / 0.5607 GB Notification: Performance of sorting global known variables: time 0.006779/1.625, allocations: 4.143 MB / 0.8616 GB, free: 1.539 MB / 0.5607 GB Notification: Performance of sort global known variables: time 2.71e-07/1.625, allocations: 0 / 0.8616 GB, free: 1.539 MB / 0.5607 GB Notification: Performance of remove unused functions: time 0.009313/1.634, allocations: 1.461 MB / 0.863 GB, free: 80 kB / 0.5607 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 256 * 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 simulation (283): * Single equations (assignments): 280 * Array equations: 3 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.009417/1.644, allocations: 5.803 MB / 0.8687 GB, free: 9.383 MB / 0.5763 GB Notification: Performance of simCode: created initialization part: time 0.01143/1.655, allocations: 5.952 MB / 0.8745 GB, free: 3.465 MB / 0.5763 GB Notification: Performance of simCode: created event and clocks part: time 5.06e-05/1.655, allocations: 12 kB / 0.8745 GB, free: 3.453 MB / 0.5763 GB Notification: Performance of simCode: created simulation system equations: time 0.002578/1.658, allocations: 1.388 MB / 0.8759 GB, free: 2.078 MB / 0.5763 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.008685/1.667, allocations: 0.984 MB / 0.8768 GB, free: 1.109 MB / 0.5763 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.1386/1.805, allocations: 72.59 MB / 0.9477 GB, free: 13.95 MB / 0.6701 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.01292/1.818, allocations: 5.733 MB / 0.9533 GB, free: 8.184 MB / 0.6701 GB Notification: Performance of simCode: alias equations: time 0.008009/1.826, allocations: 2.725 MB / 0.956 GB, free: 5.449 MB / 0.6701 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.007447/1.834, allocations: 3.784 MB / 0.9597 GB, free: 1.664 MB / 0.6701 GB Notification: Performance of SimCode: time 9.11e-07/1.834, allocations: 0 / 0.9597 GB, free: 1.664 MB / 0.6701 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.4687/2.303, allocations: 101 MB / 1.058 GB, free: 207.4 MB / 0.6857 GB Notification: Performance of buildModelFMU: Generate platform static: time 36.82/39.13, allocations: 16.94 kB / 1.058 GB, free: 207.4 MB / 0.6857 GB (rm -f ModelicaTest_4.1.0-beta.om_ModelicaTest.MultiBody.Sensors.CutForceAndTorque2.pipe ; mkfifo ModelicaTest_4.1.0-beta.om_ModelicaTest.MultiBody.Sensors.CutForceAndTorque2.pipe ; head -c 1048576 < ModelicaTest_4.1.0-beta.om_ModelicaTest.MultiBody.Sensors.CutForceAndTorque2.pipe >> ../files/ModelicaTest_4.1.0-beta.om_ModelicaTest.MultiBody.Sensors.CutForceAndTorque2.sim & python3 -m fmpy simulate --output-file ModelicaTest_4.1.0-beta.om_ModelicaTest.MultiBody.Sensors.CutForceAndTorque2_res.csv --start-time 0 --stop-time 1.1 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 0.00044 ModelicaTest_4_1_0-beta_om_ModelicaTest_MultiBody_Sensors_CutForceAndTorque2.fmu > ModelicaTest_4.1.0-beta.om_ModelicaTest.MultiBody.Sensors.CutForceAndTorque2.pipe 2>&1)