Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Modelica_3.1_Modelica.Electrical.Machines.Examples.SynchronousInductionMachines.SMPM_Braking.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) 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(Modelica.Electrical.Machines.Examples.SynchronousInductionMachines.SMPM_Braking,tolerance=1e-06,outputFormat="empty",numberOfIntervals=16000,variableFilter="",fileNamePrefix="Modelica_3.1_Modelica.Electrical.Machines.Examples.SynchronousInductionMachines.SMPM_Braking") translateModel(Modelica.Electrical.Machines.Examples.SynchronousInductionMachines.SMPM_Braking,tolerance=1e-06,outputFormat="empty",numberOfIntervals=16000,variableFilter="",fileNamePrefix="Modelica_3.1_Modelica.Electrical.Machines.Examples.SynchronousInductionMachines.SMPM_Braking") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001558/0.001558, allocations: 108 kB / 15.61 MB, free: 152 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.00179/0.00179, allocations: 196.6 kB / 16.53 MB, free: 6.664 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.839/1.839, allocations: 205.1 MB / 222.4 MB, free: 4.598 MB / 174.1 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 0.001691/0.001691, allocations: 55.92 kB / 278.7 MB, free: 12.34 MB / 238.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3669/0.3687, allocations: 46.62 MB / 325.3 MB, free: 1.844 MB / 254.1 MB Notification: Performance of NFInst.instantiate(Modelica.Electrical.Machines.Examples.SynchronousInductionMachines.SMPM_Braking): time 0.01403/0.3827, allocations: 11.44 MB / 336.8 MB, free: 8.457 MB / 270.1 MB Notification: Performance of NFInst.instExpressions: time 0.009036/0.3918, allocations: 3.771 MB / 340.5 MB, free: 4.672 MB / 270.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.002229/0.3941, allocations: 55.75 kB / 340.6 MB, free: 4.617 MB / 270.1 MB Notification: Performance of NFTyping.typeComponents: time 0.002171/0.3963, allocations: 0.8189 MB / 341.4 MB, free: 3.793 MB / 270.1 MB Notification: Performance of NFTyping.typeBindings: time 0.003091/0.3995, allocations: 0.9201 MB / 342.3 MB, free: 2.867 MB / 270.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.00145/0.4009, allocations: 0.4914 MB / 342.8 MB, free: 2.375 MB / 270.1 MB Notification: Performance of NFFlatten.flatten: time 0.004439/0.4054, allocations: 3.351 MB / 346.2 MB, free: 15.01 MB / 286.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.003793/0.4092, allocations: 2.536 MB / 348.7 MB, free: 12.41 MB / 286.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.002366/0.4116, allocations: 1.46 MB / 350.2 MB, free: 10.95 MB / 286.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.003136/0.4147, allocations: 1.794 MB / 352 MB, free: 9.148 MB / 286.1 MB Notification: Performance of NFPackage.collectConstants: time 0.001482/0.4162, allocations: 392 kB / 352.3 MB, free: 8.766 MB / 286.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.002201/0.4184, allocations: 483.8 kB / 352.8 MB, free: 8.293 MB / 286.1 MB Notification: Performance of NFScalarize.scalarize: time 0.002108/0.4205, allocations: 1.087 MB / 353.9 MB, free: 7.203 MB / 286.1 MB Notification: Performance of NFVerifyModel.verify: time 0.004072/0.4246, allocations: 1.754 MB / 355.6 MB, free: 5.441 MB / 286.1 MB Notification: Performance of NFConvertDAE.convert: time 0.007187/0.4318, allocations: 5.067 MB / 360.7 MB, free: 368 kB / 286.1 MB Notification: Performance of FrontEnd - DAE generated: time 7.294e-06/0.4319, allocations: 0 / 360.7 MB, free: 368 kB / 286.1 MB Notification: Performance of FrontEnd: time 1.623e-06/0.4319, allocations: 0 / 360.7 MB, free: 368 kB / 286.1 MB Notification: Performance of Transformations before backend: time 0.0002142/0.4321, allocations: 0 / 360.7 MB, free: 368 kB / 286.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 653 * Number of variables: 653 Notification: Performance of Generate backend data structure: time 0.0108/0.4429, allocations: 3.472 MB / 364.2 MB, free: 12.82 MB / 302.1 MB Notification: Performance of prepare preOptimizeDAE: time 4.471e-05/0.443, allocations: 15.89 kB / 364.2 MB, free: 12.8 MB / 302.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001603/0.4446, allocations: 357 kB / 364.5 MB, free: 12.45 MB / 302.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.004205/0.4488, allocations: 1.765 MB / 366.3 MB, free: 10.63 MB / 302.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001903/0.449, allocations: 185.1 kB / 366.5 MB, free: 10.45 MB / 302.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0007884/0.4498, allocations: 251.9 kB / 366.7 MB, free: 10.2 MB / 302.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.008672/0.4585, allocations: 3.414 MB / 370.2 MB, free: 6.684 MB / 302.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 0.000145/0.4587, allocations: 19.89 kB / 370.2 MB, free: 6.664 MB / 302.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0005952/0.4593, allocations: 103.9 kB / 370.3 MB, free: 6.562 MB / 302.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0001673/0.4595, allocations: 116.8 kB / 370.4 MB, free: 6.445 MB / 302.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.007195/0.4667, allocations: 2.923 MB / 373.3 MB, free: 3.508 MB / 302.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.02563/0.4924, allocations: 10.89 MB / 384.2 MB, free: 8.32 MB / 318.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.00449/0.4969, allocations: 2.425 MB / 386.6 MB, free: 5.73 MB / 318.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.002737/0.4997, allocations: 1.168 MB / 387.8 MB, free: 4.559 MB / 318.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.0003656/0.5001, allocations: 134.4 kB / 387.9 MB, free: 4.41 MB / 318.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 6.835e-05/0.5002, allocations: 52.28 kB / 388 MB, free: 4.352 MB / 318.1 MB Notification: Performance of pre-optimization done (n=133): time 5.31e-06/0.5002, allocations: 0 / 388 MB, free: 4.352 MB / 318.1 MB Notification: Performance of matching and sorting (n=147): time 0.02228/0.5225, allocations: 7.255 MB / 395.2 MB, free: 12.97 MB / 334.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 7.693e-05/0.5226, allocations: 90.42 kB / 395.3 MB, free: 12.86 MB / 334.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.004102/0.5267, allocations: 1.838 MB / 397.2 MB, free: 11.02 MB / 334.1 MB Notification: Performance of collectPreVariables (initialization): time 0.0002207/0.527, allocations: 49.7 kB / 397.2 MB, free: 10.97 MB / 334.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.001272/0.5282, allocations: 1.218 MB / 398.4 MB, free: 9.734 MB / 334.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0005843/0.5288, allocations: 496.8 kB / 398.9 MB, free: 9.242 MB / 334.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0006484/0.5295, allocations: 319.2 kB / 399.2 MB, free: 8.926 MB / 334.1 MB Notification: Performance of setup shared object (initialization): time 0.0001312/0.5297, allocations: 305.1 kB / 399.5 MB, free: 8.625 MB / 334.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001527/0.5312, allocations: 0.8636 MB / 400.4 MB, free: 7.758 MB / 334.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001878/0.5331, allocations: 1.31 MB / 401.7 MB, free: 6.25 MB / 334.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.003491/0.5366, allocations: 2.26 MB / 404 MB, free: 3.785 MB / 334.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.941e-05/0.5366, allocations: 4 kB / 404 MB, free: 3.781 MB / 334.1 MB Notification: Performance of matching and sorting (n=218) (initialization): time 0.005395/0.542, allocations: 2.852 MB / 406.8 MB, free: 0.9062 MB / 334.1 MB Notification: Performance of prepare postOptimizeDAE: time 4.807e-05/0.5421, allocations: 12 kB / 406.8 MB, free: 0.8945 MB / 334.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.412e-05/0.5421, allocations: 16 kB / 406.8 MB, free: 0.8789 MB / 334.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.001814/0.544, allocations: 0.675 MB / 407.5 MB, free: 196 kB / 334.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001357/0.5453, allocations: 359.4 kB / 407.9 MB, free: 15.84 MB / 350.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01069/0.556, allocations: 9.052 MB / 416.9 MB, free: 6.363 MB / 350.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0018/0.5579, allocations: 111.7 kB / 417 MB, free: 6.254 MB / 350.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002963/0.5582, allocations: 72 kB / 417.1 MB, free: 6.184 MB / 350.1 MB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.003117/0.5613, allocations: 1.585 MB / 418.7 MB, free: 4.594 MB / 350.1 MB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.002105/0.5635, allocations: 1.299 MB / 420 MB, free: 3.102 MB / 350.1 MB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.003554/0.5671, allocations: 2.249 MB / 422.2 MB, free: 0.6602 MB / 350.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.863e-05/0.5671, allocations: 4 kB / 422.2 MB, free: 0.6562 MB / 350.1 MB Notification: Performance of matching and sorting (n=218) (initialization_lambda0): time 0.005661/0.5728, allocations: 2.837 MB / 425.1 MB, free: 13.8 MB / 366.1 MB Notification: Performance of prepare postOptimizeDAE: time 3.375e-05/0.5728, allocations: 14.97 kB / 425.1 MB, free: 13.79 MB / 366.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.418e-05/0.5729, allocations: 16.03 kB / 425.1 MB, free: 13.77 MB / 366.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.001664/0.5746, allocations: 0.6629 MB / 425.8 MB, free: 13.09 MB / 366.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001431/0.576, allocations: 355.4 kB / 426.1 MB, free: 12.75 MB / 366.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01039/0.5864, allocations: 9.061 MB / 435.2 MB, free: 3.266 MB / 366.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002134/0.5886, allocations: 103.9 kB / 435.3 MB, free: 3.164 MB / 366.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002716/0.5889, allocations: 76.09 kB / 435.3 MB, free: 3.09 MB / 366.1 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 63 * Number of states: 0 () * Number of discrete variables: 6 (diodeBridge2mPulse.diode_n.idealDiode[3].off,diodeBridge2mPulse.diode_n.idealDiode[2].off,diodeBridge2mPulse.diode_n.idealDiode[1].off,diodeBridge2mPulse.diode_p.idealDiode[3].off,diodeBridge2mPulse.diode_p.idealDiode[2].off,diodeBridge2mPulse.diode_p.idealDiode[1].off) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (181): * Single equations (assignments): 177 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 3 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 1 system {(2,100.0%)} * Non-linear Jacobian (size): 0 systems * Without analytic Jacobian (size): 0 systems Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 2 systems {(2,9,100.0%), (1,1,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(6,20)} Notification: Performance of prepare postOptimizeDAE: time 0.0005798/0.5895, allocations: 295.8 kB / 435.6 MB, free: 2.793 MB / 366.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0006295/0.5901, allocations: 197.6 kB / 435.8 MB, free: 2.598 MB / 366.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.004854/0.595, allocations: 2.566 MB / 438.4 MB, free: 4 kB / 366.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.718e-05/0.595, allocations: 16.05 kB / 438.4 MB, free: 15.98 MB / 382.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 9.167e-06/0.595, allocations: 0 / 438.4 MB, free: 15.98 MB / 382.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.567e-05/0.5951, allocations: 11.92 kB / 438.4 MB, free: 15.98 MB / 382.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.01133/0.6064, allocations: 5.429 MB / 443.9 MB, free: 10.45 MB / 382.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.092e-05/0.6065, allocations: 4 kB / 443.9 MB, free: 10.44 MB / 382.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0009746/0.6075, allocations: 215.7 kB / 444.1 MB, free: 10.23 MB / 382.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.001758/0.6092, allocations: 0.7026 MB / 444.8 MB, free: 9.516 MB / 382.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.000122/0.6094, allocations: 31.98 kB / 444.8 MB, free: 9.484 MB / 382.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.2841/0.8935, allocations: 10.64 MB / 455.4 MB, free: 109.1 MB / 382.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.153e-05/0.8936, allocations: 6.781 kB / 455.5 MB, free: 109.1 MB / 382.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.00827/0.9018, allocations: 3.755 MB / 459.2 MB, free: 108.7 MB / 382.1 MB Notification: Performance of postOpt removeConstants (simulation): time 0.002128/0.904, allocations: 468.9 kB / 459.7 MB, free: 108.5 MB / 382.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0005516/0.9046, allocations: 31.31 kB / 459.7 MB, free: 108.5 MB / 382.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001155/0.9058, allocations: 95.31 kB / 459.8 MB, free: 108.5 MB / 382.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0004613/0.9063, allocations: 116.9 kB / 459.9 MB, free: 108.5 MB / 382.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001182/0.9064, allocations: 44.27 kB / 459.9 MB, free: 108.4 MB / 382.1 MB Notification: Performance of sorting global known variables: time 0.002887/0.9093, allocations: 1.256 MB / 461.2 MB, free: 108 MB / 382.1 MB Notification: Performance of sort global known variables: time 1.71e-07/0.9093, allocations: 3.562 kB / 461.2 MB, free: 108 MB / 382.1 MB Notification: Performance of remove unused functions: time 0.00497/0.9143, allocations: 1.004 MB / 462.2 MB, free: 107.9 MB / 382.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 10 * Number of states: 5 (smpm.inertiaRotor.w,smpm.i_0_s,smpm.idq_sr[1],smpm.idq_sr[2],inertiaLoad.phi) * Number of discrete variables: 6 (diodeBridge2mPulse.diode_p.idealDiode[1].off,diodeBridge2mPulse.diode_p.idealDiode[2].off,diodeBridge2mPulse.diode_p.idealDiode[3].off,diodeBridge2mPulse.diode_n.idealDiode[1].off,diodeBridge2mPulse.diode_n.idealDiode[2].off,diodeBridge2mPulse.diode_n.idealDiode[3].off) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (110): * Single equations (assignments): 106 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 4 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 3 systems {(2,9,100.0%), (1,1,100.0%), (2,1,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(6,20)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0005654/0.9149, allocations: 199.3 kB / 462.4 MB, free: 107.8 MB / 382.1 MB Notification: Performance of simCode: created initialization part: time 0.009549/0.9244, allocations: 5.193 MB / 467.6 MB, free: 105.6 MB / 382.1 MB Notification: Performance of simCode: created event and clocks part: time 1.283e-05/0.9245, allocations: 0 / 467.6 MB, free: 105.6 MB / 382.1 MB Notification: Performance of simCode: created simulation system equations: time 0.002693/0.9272, allocations: 1.733 MB / 469.3 MB, free: 104.7 MB / 382.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.00369/0.9309, allocations: 0.6249 MB / 470 MB, free: 104.2 MB / 382.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01366/0.9446, allocations: 5.885 MB / 475.8 MB, free: 98.98 MB / 382.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.002517/0.9472, allocations: 2.101 MB / 477.9 MB, free: 97.1 MB / 382.1 MB Notification: Performance of simCode: alias equations: time 0.002545/0.9498, allocations: 0.5834 MB / 478.5 MB, free: 96.52 MB / 382.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003709/0.9502, allocations: 135.4 kB / 478.7 MB, free: 96.38 MB / 382.1 MB Notification: Performance of SimCode: time 2.285e-06/0.9502, allocations: 0 / 478.7 MB, free: 96.38 MB / 382.1 MB Notification: Performance of Templates: time 0.08099/1.031, allocations: 41.91 MB / 0.5084 GB, free: 54.43 MB / 382.1 MB make -j1 -f Modelica_3.1_Modelica.Electrical.Machines.Examples.SynchronousInductionMachines.SMPM_Braking.makefile (rm -f Modelica_3.1_Modelica.Electrical.Machines.Examples.SynchronousInductionMachines.SMPM_Braking.pipe ; mkfifo Modelica_3.1_Modelica.Electrical.Machines.Examples.SynchronousInductionMachines.SMPM_Braking.pipe ; head -c 1048576 < Modelica_3.1_Modelica.Electrical.Machines.Examples.SynchronousInductionMachines.SMPM_Braking.pipe >> ../files/Modelica_3.1_Modelica.Electrical.Machines.Examples.SynchronousInductionMachines.SMPM_Braking.sim & ./Modelica_3.1_Modelica.Electrical.Machines.Examples.SynchronousInductionMachines.SMPM_Braking -abortSlowSimulation -alarm=480 -lv LOG_STATS > Modelica_3.1_Modelica.Electrical.Machines.Examples.SynchronousInductionMachines.SMPM_Braking.pipe 2>&1)