Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.Example1v1.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/Buildings 7.0.3-maint.7.0.x/package.mo", uses=false) Using package Buildings with version 7.0.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/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(Buildings.Fluid.Examples.Performance.Example1v1,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.Example1v1") translateModel(Buildings.Fluid.Examples.Performance.Example1v1,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.Example1v1") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.007391/0.007391, allocations: 103 kB / 15.74 MB, free: 6.496 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.0012/0.0012, allocations: 192.2 kB / 16.68 MB, free: 6.375 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.489/1.489, allocations: 205.1 MB / 222.5 MB, free: 4.516 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo): time 1.535/1.535, allocations: 251.7 MB / 0.5094 GB, free: 3.129 MB / 414.1 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: Performance of FrontEnd - loaded program: time 0.001436/0.001436, allocations: 76.45 kB / 0.7258 GB, free: 9.141 MB / 0.545 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2131/0.2145, allocations: 104.7 MB / 0.8281 GB, free: 340 kB / 0.6387 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.Examples.Performance.Example1v1): time 0.06401/0.2786, allocations: 72.61 MB / 0.899 GB, free: 7.469 MB / 0.7169 GB Notification: Performance of NFInst.instExpressions: time 0.4624/0.741, allocations: 20.06 MB / 0.9185 GB, free: 12.46 MB / 0.7169 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.004315/0.7454, allocations: 96.84 kB / 0.9186 GB, free: 12.46 MB / 0.7169 GB Notification: Performance of NFTyping.typeComponents: time 0.003617/0.749, allocations: 1.01 MB / 0.9196 GB, free: 12.45 MB / 0.7169 GB Notification: Performance of NFTyping.typeBindings: time 0.007236/0.7563, allocations: 2.332 MB / 0.9219 GB, free: 12.34 MB / 0.7169 GB Notification: Performance of NFTyping.typeClassSections: time 0.006195/0.7625, allocations: 2.081 MB / 0.9239 GB, free: 12.3 MB / 0.7169 GB Notification: Performance of NFFlatten.flatten: time 0.01158/0.7741, allocations: 8.008 MB / 0.9318 GB, free: 12.12 MB / 0.7169 GB Notification: Performance of NFFlatten.resolveConnections: time 0.009544/0.7837, allocations: 6.111 MB / 0.9377 GB, free: 11.18 MB / 0.7169 GB Notification: Performance of NFEvalConstants.evaluate: time 0.008215/0.792, allocations: 3.263 MB / 0.9409 GB, free: 10.57 MB / 0.7169 GB Notification: Performance of NFSimplifyModel.simplify: time 0.006214/0.7982, allocations: 2.484 MB / 0.9433 GB, free: 9.73 MB / 0.7169 GB Notification: Performance of NFPackage.collectConstants: time 0.001596/0.7998, allocations: 253.5 kB / 0.9436 GB, free: 9.73 MB / 0.7169 GB Notification: Performance of NFFlatten.collectFunctions: time 0.006122/0.806, allocations: 1.38 MB / 0.9449 GB, free: 9.418 MB / 0.7169 GB Notification: Performance of NFScalarize.scalarize: time 0.001683/0.8077, allocations: 0.7624 MB / 0.9457 GB, free: 8.988 MB / 0.7169 GB Notification: Performance of NFVerifyModel.verify: time 0.00542/0.8131, allocations: 1.759 MB / 0.9474 GB, free: 7.953 MB / 0.7169 GB Notification: Performance of NFConvertDAE.convert: time 0.009233/0.8224, allocations: 4.738 MB / 0.952 GB, free: 6.348 MB / 0.7169 GB Notification: Performance of FrontEnd - DAE generated: time 6.352e-06/0.8224, allocations: 5.375 kB / 0.952 GB, free: 6.344 MB / 0.7169 GB Notification: Performance of FrontEnd: time 1.453e-06/0.8224, allocations: 0 / 0.952 GB, free: 6.344 MB / 0.7169 GB Notification: Performance of Transformations before backend: time 0.0001371/0.8226, allocations: 0 / 0.952 GB, free: 6.344 MB / 0.7169 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 398 * Number of variables: 398 Notification: Performance of Generate backend data structure: time 0.008287/0.8309, allocations: 4.032 MB / 0.956 GB, free: 3.938 MB / 0.7169 GB Notification: Performance of prepare preOptimizeDAE: time 5.918e-05/0.8309, allocations: 9.625 kB / 0.956 GB, free: 3.938 MB / 0.7169 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002716/0.8337, allocations: 0.5689 MB / 0.9565 GB, free: 3.719 MB / 0.7169 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.00579/0.8395, allocations: 2.76 MB / 0.9592 GB, free: 2 MB / 0.7169 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001076/0.8396, allocations: 139.3 kB / 0.9593 GB, free: 1.941 MB / 0.7169 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002792/0.8399, allocations: 189.5 kB / 0.9595 GB, free: 1.883 MB / 0.7169 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.003679/0.8436, allocations: 2.324 MB / 0.9618 GB, free: 300 kB / 0.7169 GB Notification: Performance of preOpt findStateOrder (simulation): time 4.163e-05/0.8436, allocations: 8.812 kB / 0.9618 GB, free: 296 kB / 0.7169 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001543/0.8438, allocations: 68.69 kB / 0.9619 GB, free: 244 kB / 0.7169 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.25e-05/0.8438, allocations: 43.03 kB / 0.9619 GB, free: 244 kB / 0.7169 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.003333/0.8471, allocations: 1.866 MB / 0.9637 GB, free: 15.27 MB / 0.7325 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 0.01318/0.8603, allocations: 11.09 MB / 0.9746 GB, free: 6.074 MB / 0.7325 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002532/0.8629, allocations: 1.338 MB / 0.9759 GB, free: 5.395 MB / 0.7325 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001505/0.8644, allocations: 1.017 MB / 0.9769 GB, free: 4.891 MB / 0.7325 GB Notification: Performance of preOpt evalFunc (simulation): time 0.005802/0.8702, allocations: 3.628 MB / 0.9804 GB, free: 1.898 MB / 0.7325 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001408/0.8716, allocations: 0.777 MB / 0.9812 GB, free: 1.434 MB / 0.7325 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.001365/0.873, allocations: 241.6 kB / 0.9814 GB, free: 1.312 MB / 0.7325 GB Notification: Performance of pre-optimization done (n=95): time 3.316e-06/0.873, allocations: 0 / 0.9814 GB, free: 1.312 MB / 0.7325 GB Notification: Performance of matching and sorting (n=95): time 0.01187/0.8849, allocations: 4.17 MB / 0.9855 GB, free: 14.14 MB / 0.7481 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.882e-05/0.885, allocations: 60.41 kB / 0.9855 GB, free: 14.07 MB / 0.7481 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.004721/0.8897, allocations: 2.867 MB / 0.9883 GB, free: 11.21 MB / 0.7481 GB Notification: Performance of collectPreVariables (initialization): time 0.0002893/0.89, allocations: 57.7 kB / 0.9884 GB, free: 11.14 MB / 0.7481 GB Notification: Performance of collectInitialEqns (initialization): time 0.001425/0.8915, allocations: 1.435 MB / 0.9898 GB, free: 9.703 MB / 0.7481 GB Notification: Performance of collectInitialBindings (initialization): time 0.0004553/0.8919, allocations: 357.2 kB / 0.9901 GB, free: 9.363 MB / 0.7481 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0006924/0.8926, allocations: 347.8 kB / 0.9905 GB, free: 9.016 MB / 0.7481 GB Notification: Performance of setup shared object (initialization): time 9.899e-05/0.8928, allocations: 305.1 kB / 0.9907 GB, free: 8.715 MB / 0.7481 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.00143/0.8942, allocations: 0.6848 MB / 0.9914 GB, free: 8.027 MB / 0.7481 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001946/0.8962, allocations: 1.434 MB / 0.9928 GB, free: 6.242 MB / 0.7481 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.003193/0.8994, allocations: 1.912 MB / 0.9947 GB, free: 4.129 MB / 0.7481 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.288e-05/0.8994, allocations: 8 kB / 0.9947 GB, free: 4.121 MB / 0.7481 GB Notification: Performance of matching and sorting (n=183) (initialization): time 0.00643/0.9058, allocations: 2.848 MB / 0.9975 GB, free: 1.258 MB / 0.7481 GB Notification: Performance of prepare postOptimizeDAE: time 6.931e-05/0.9059, allocations: 41.88 kB / 0.9975 GB, free: 1.211 MB / 0.7481 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.261e-05/0.906, allocations: 16 kB / 0.9975 GB, free: 1.195 MB / 0.7481 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.002534/0.9085, allocations: 0.6904 MB / 0.9982 GB, free: 0.5039 MB / 0.7481 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001383/0.9099, allocations: 293.4 kB / 0.9985 GB, free: 224 kB / 0.7481 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00237/0.9123, allocations: 1.902 MB / 1 GB, free: 14.27 MB / 0.7637 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003502/0.9158, allocations: 96.94 kB / 1 GB, free: 14.17 MB / 0.7637 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002845/0.9161, allocations: 87.94 kB / 1.001 GB, free: 14.09 MB / 0.7637 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.003381/0.9195, allocations: 1.275 MB / 1.002 GB, free: 12.81 MB / 0.7637 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.00201/0.9215, allocations: 1.386 MB / 1.003 GB, free: 11.07 MB / 0.7637 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.003577/0.9251, allocations: 1.822 MB / 1.005 GB, free: 9.047 MB / 0.7637 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.191e-05/0.9252, allocations: 7.938 kB / 1.005 GB, free: 9.039 MB / 0.7637 GB Notification: Performance of matching and sorting (n=183) (initialization_lambda0): time 0.005628/0.9308, allocations: 2.694 MB / 1.008 GB, free: 6.301 MB / 0.7637 GB Notification: Performance of prepare postOptimizeDAE: time 4.48e-05/0.9309, allocations: 44.52 kB / 1.008 GB, free: 6.254 MB / 0.7637 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.27e-05/0.9309, allocations: 16.84 kB / 1.008 GB, free: 6.238 MB / 0.7637 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0009212/0.9318, allocations: 469.3 kB / 1.008 GB, free: 5.773 MB / 0.7637 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001229/0.9331, allocations: 301 kB / 1.008 GB, free: 5.473 MB / 0.7637 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00726/0.9403, allocations: 6.345 MB / 1.015 GB, free: 14.86 MB / 0.7794 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002484/0.9429, allocations: 109.5 kB / 1.015 GB, free: 14.75 MB / 0.7794 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002541/0.9431, allocations: 75.97 kB / 1.015 GB, free: 14.67 MB / 0.7794 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 66 * Number of states: 0 () * Number of discrete variables: 8 (pulse.count,$PRE.pulse.count,pulse.T_start,$PRE.pulse.T_start,$whenCondition1,from_dp.y,nRes.y,allowFlowReversal.y) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (135): * Single equations (assignments): 131 * Array equations: 1 * Algorithm blocks: 1 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 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): 2 systems {(1,40), (2,5)} Notification: Performance of prepare postOptimizeDAE: time 0.0005374/0.9437, allocations: 292.2 kB / 1.015 GB, free: 14.38 MB / 0.7794 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0008867/0.9446, allocations: 313.9 kB / 1.015 GB, free: 14.07 MB / 0.7794 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.006119/0.9507, allocations: 2.423 MB / 1.018 GB, free: 11.64 MB / 0.7794 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.221e-05/0.9507, allocations: 16 kB / 1.018 GB, free: 11.62 MB / 0.7794 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 9.137e-06/0.9508, allocations: 0 / 1.018 GB, free: 11.62 MB / 0.7794 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.003559/0.9543, allocations: 2.062 MB / 1.02 GB, free: 9.496 MB / 0.7794 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.01004/0.9644, allocations: 4.378 MB / 1.024 GB, free: 5.082 MB / 0.7794 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.233e-06/0.9644, allocations: 0 / 1.024 GB, free: 5.082 MB / 0.7794 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0008471/0.9653, allocations: 165.6 kB / 1.024 GB, free: 4.922 MB / 0.7794 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.001131/0.9664, allocations: 478.9 kB / 1.025 GB, free: 4.453 MB / 0.7794 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001052/0.9666, allocations: 31.98 kB / 1.025 GB, free: 4.422 MB / 0.7794 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001814/0.9684, allocations: 1.855 MB / 1.026 GB, free: 2.512 MB / 0.7794 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.256e-06/0.9684, allocations: 80 / 1.026 GB, free: 2.512 MB / 0.7794 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.006185/0.9746, allocations: 3.132 MB / 1.029 GB, free: 15.36 MB / 0.795 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001656/0.9763, allocations: 490.8 kB / 1.03 GB, free: 14.86 MB / 0.795 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000967/0.9773, allocations: 32.06 kB / 1.03 GB, free: 14.83 MB / 0.795 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001773/0.979, allocations: 67.83 kB / 1.03 GB, free: 14.76 MB / 0.795 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001993/0.9793, allocations: 76.89 kB / 1.03 GB, free: 14.69 MB / 0.795 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001223/0.9794, allocations: 51.91 kB / 1.03 GB, free: 14.64 MB / 0.795 GB Notification: Performance of sorting global known variables: time 0.00407/0.9835, allocations: 1.958 MB / 1.032 GB, free: 12.69 MB / 0.795 GB Notification: Performance of sort global known variables: time 2.6e-07/0.9835, allocations: 0 / 1.032 GB, free: 12.69 MB / 0.795 GB Notification: Performance of remove unused functions: time 0.005106/0.9886, allocations: 1.345 MB / 1.033 GB, free: 11.34 MB / 0.795 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 2 (pump.vol.dynBal.U,hea.outCon.T) * Number of discrete variables: 3 ($whenCondition1,pulse.T_start,pulse.count) * Number of discrete states: 1 (pulse.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (79): * Single equations (assignments): 71 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 4 * When equations: 2 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 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): 2 systems {(2,5), (1,40)} Notification: Performance of Backend phase and start with SimCode phase: time 0.001401/0.99, allocations: 466.9 kB / 1.034 GB, free: 10.91 MB / 0.795 GB Notification: Performance of simCode: created initialization part: time 0.006465/0.9965, allocations: 3.183 MB / 1.037 GB, free: 7.684 MB / 0.795 GB Notification: Performance of simCode: created event and clocks part: time 5.039e-06/0.9965, allocations: 0 / 1.037 GB, free: 7.684 MB / 0.795 GB Notification: Performance of simCode: created simulation system equations: time 0.001653/0.9982, allocations: 0.7926 MB / 1.038 GB, free: 6.891 MB / 0.795 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.006721/1.005, allocations: 1.267 MB / 1.039 GB, free: 5.641 MB / 0.795 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01022/1.015, allocations: 5.213 MB / 1.044 GB, free: 404 kB / 0.795 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.002261/1.017, allocations: 2.05 MB / 1.046 GB, free: 14.32 MB / 0.8106 GB Notification: Performance of simCode: alias equations: time 0.002641/1.02, allocations: 0.6873 MB / 1.047 GB, free: 13.63 MB / 0.8106 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0005867/1.021, allocations: 211.4 kB / 1.047 GB, free: 13.42 MB / 0.8106 GB Notification: Performance of SimCode: time 6.41e-07/1.021, allocations: 0 / 1.047 GB, free: 13.42 MB / 0.8106 GB Notification: Performance of Templates: time 0.09316/1.114, allocations: 55.12 MB / 1.101 GB, free: 7.152 MB / 0.8575 GB make -j1 -f Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.Example1v1.makefile (rm -f Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.Example1v1.pipe ; mkfifo Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.Example1v1.pipe ; head -c 1048576 < Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.Example1v1.pipe >> ../files/Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.Example1v1.sim & ./Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.Example1v1 -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_maint.7.0.x_Buildings.Fluid.Examples.Performance.Example1v1.pipe 2>&1)