Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IBPSA_latest_IBPSA.Fluid.Examples.Performance.Example2.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/IBPSA 4.0.0-master/package.mo", uses=false) Using package IBPSA with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/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(IBPSA.Fluid.Examples.Performance.Example2,fileNamePrefix="IBPSA_latest_IBPSA_Fluid_Examples_Performance_Example2",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IBPSA.Fluid.Examples.Performance.Example2,fileNamePrefix="IBPSA_latest_IBPSA_Fluid_Examples_Performance_Example2",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 0.001561/0.001561, allocations: 101 kB / 16.27 MB, free: 5.969 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001722/0.001722, allocations: 189.9 kB / 17.19 MB, free: 5.598 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.328/1.328, allocations: 222.9 MB / 240.9 MB, free: 15.21 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IBPSA 4.0.0-master/package.mo): time 0.7377/0.7377, allocations: 122.8 MB / 413.9 MB, free: 15.93 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001286/0.001286, allocations: 63.91 kB / 0.4912 GB, free: 7.391 MB / 414.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3058/0.3071, allocations: 77.92 MB / 0.5673 GB, free: 32.52 MB / 446.1 MB Notification: Performance of NFInst.instantiate(IBPSA.Fluid.Examples.Performance.Example2): time 0.02397/0.3312, allocations: 30.02 MB / 0.5966 GB, free: 10.31 MB / 446.1 MB Notification: Performance of NFInst.instExpressions: time 0.01413/0.3453, allocations: 11.73 MB / 0.608 GB, free: 0.9102 MB / 446.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.001595/0.3469, allocations: 51.53 kB / 0.6081 GB, free: 0.8906 MB / 446.1 MB Notification: Performance of NFTyping.typeComponents: time 0.007196/0.3542, allocations: 3.928 MB / 0.6119 GB, free: 13.05 MB / 462.1 MB Notification: Performance of NFTyping.typeBindings: time 0.003934/0.3581, allocations: 1.519 MB / 0.6134 GB, free: 11.53 MB / 462.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.003299/0.3614, allocations: 1.394 MB / 0.6148 GB, free: 10.14 MB / 462.1 MB Notification: Performance of NFFlatten.flatten: time 0.008684/0.3701, allocations: 6.613 MB / 0.6212 GB, free: 3.523 MB / 462.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.001874/0.372, allocations: 1.369 MB / 0.6226 GB, free: 2.117 MB / 462.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.003003/0.375, allocations: 1.46 MB / 0.624 GB, free: 0.6562 MB / 462.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.001782/0.3768, allocations: 1.077 MB / 0.625 GB, free: 15.57 MB / 478.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0003893/0.3772, allocations: 120 kB / 0.6252 GB, free: 15.45 MB / 478.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.00285/0.3801, allocations: 1.306 MB / 0.6264 GB, free: 14.15 MB / 478.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0007029/0.3808, allocations: 0.5217 MB / 0.6269 GB, free: 13.62 MB / 478.1 MB Notification: Performance of NFVerifyModel.verify: time 0.001221/0.382, allocations: 0.96 MB / 0.6279 GB, free: 12.66 MB / 478.1 MB Notification: Performance of NFConvertDAE.convert: time 0.003764/0.3858, allocations: 2.971 MB / 0.6308 GB, free: 9.68 MB / 478.1 MB Notification: Performance of FrontEnd - DAE generated: time 3.938e-06/0.3858, allocations: 0 / 0.6308 GB, free: 9.68 MB / 478.1 MB Notification: Performance of FrontEnd: time 3.386e-06/0.3858, allocations: 0 / 0.6308 GB, free: 9.68 MB / 478.1 MB Notification: Performance of Transformations before backend: time 2.766e-05/0.3859, allocations: 7.938 kB / 0.6308 GB, free: 9.672 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: 192 * Number of variables: 192 Notification: Performance of Generate backend data structure: time 0.00347/0.3893, allocations: 2.335 MB / 0.6331 GB, free: 7.266 MB / 478.1 MB Notification: Performance of prepare preOptimizeDAE: time 3.866e-05/0.3894, allocations: 8.625 kB / 0.6331 GB, free: 7.258 MB / 478.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001457/0.3895, allocations: 134.7 kB / 0.6332 GB, free: 7.117 MB / 478.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001842/0.3914, allocations: 381.2 kB / 0.6336 GB, free: 6.742 MB / 478.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003495/0.3949, allocations: 2.297 MB / 0.6358 GB, free: 4.398 MB / 478.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0001023/0.395, allocations: 70.17 kB / 0.6359 GB, free: 4.328 MB / 478.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.000139/0.3952, allocations: 88 kB / 0.636 GB, free: 4.242 MB / 478.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0018/0.397, allocations: 1.009 MB / 0.6369 GB, free: 3.176 MB / 478.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.509e-05/0.397, allocations: 11.94 kB / 0.637 GB, free: 3.164 MB / 478.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 8.189e-05/0.3971, allocations: 32 kB / 0.637 GB, free: 3.133 MB / 478.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.878e-05/0.3971, allocations: 20 kB / 0.637 GB, free: 3.113 MB / 478.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001844/0.399, allocations: 0.7493 MB / 0.6377 GB, free: 2.359 MB / 478.1 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 0.006274/0.4053, allocations: 5.268 MB / 0.6429 GB, free: 12.76 MB / 494.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.001419/0.4067, allocations: 0.5673 MB / 0.6434 GB, free: 12.18 MB / 494.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0007456/0.4075, allocations: 325.5 kB / 0.6438 GB, free: 11.86 MB / 494.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.002579/0.4101, allocations: 1.631 MB / 0.6453 GB, free: 10.08 MB / 494.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0007534/0.4108, allocations: 334.8 kB / 0.6457 GB, free: 9.742 MB / 494.1 MB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0003246/0.4112, allocations: 59.36 kB / 0.6457 GB, free: 9.684 MB / 494.1 MB Notification: Performance of pre-optimization done (n=42): time 2.425e-06/0.4112, allocations: 7.938 kB / 0.6457 GB, free: 9.676 MB / 494.1 MB Notification: Performance of matching and sorting (n=42): time 0.003408/0.4146, allocations: 1.23 MB / 0.6469 GB, free: 8.414 MB / 494.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 3.763e-05/0.4146, allocations: 63.34 kB / 0.647 GB, free: 8.34 MB / 494.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002247/0.4169, allocations: 1.85 MB / 0.6488 GB, free: 6.445 MB / 494.1 MB Notification: Performance of collectPreVariables (initialization): time 6.506e-05/0.417, allocations: 41.7 kB / 0.6488 GB, free: 6.398 MB / 494.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0006423/0.4176, allocations: 0.7909 MB / 0.6496 GB, free: 5.598 MB / 494.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0001393/0.4178, allocations: 142 kB / 0.6497 GB, free: 5.457 MB / 494.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003439/0.4181, allocations: 274.3 kB / 0.65 GB, free: 5.18 MB / 494.1 MB Notification: Performance of setup shared object (initialization): time 0.0001297/0.4183, allocations: 349.9 kB / 0.6503 GB, free: 4.832 MB / 494.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0008804/0.4191, allocations: 468.9 kB / 0.6508 GB, free: 4.375 MB / 494.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001118/0.4203, allocations: 0.8392 MB / 0.6516 GB, free: 3.375 MB / 494.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.001817/0.4221, allocations: 1.173 MB / 0.6527 GB, free: 2.078 MB / 494.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.129e-06/0.4221, allocations: 0 / 0.6527 GB, free: 2.078 MB / 494.1 MB Notification: Performance of matching and sorting (n=150) (initialization): time 0.00329/0.4254, allocations: 1.596 MB / 0.6543 GB, free: 480 kB / 494.1 MB Notification: Performance of prepare postOptimizeDAE: time 4.478e-05/0.4255, allocations: 41.7 kB / 0.6543 GB, free: 432 kB / 494.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.753e-05/0.4255, allocations: 8 kB / 0.6544 GB, free: 424 kB / 494.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.0006896/0.4262, allocations: 185.7 kB / 0.6545 GB, free: 236 kB / 494.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0007417/0.427, allocations: 203.6 kB / 0.6547 GB, free: 32 kB / 494.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0007813/0.4277, allocations: 0.7675 MB / 0.6555 GB, free: 15.24 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001029/0.4288, allocations: 68.44 kB / 0.6555 GB, free: 15.17 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001007/0.4289, allocations: 47.98 kB / 0.6556 GB, free: 15.12 MB / 0.4981 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001456/0.4304, allocations: 0.8652 MB / 0.6564 GB, free: 14.26 MB / 0.4981 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.001109/0.4315, allocations: 0.8262 MB / 0.6572 GB, free: 13.27 MB / 0.4981 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001744/0.4332, allocations: 1.124 MB / 0.6583 GB, free: 12.02 MB / 0.4981 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 5.47e-06/0.4333, allocations: 0 / 0.6583 GB, free: 12.02 MB / 0.4981 GB Notification: Performance of matching and sorting (n=150) (initialization_lambda0): time 0.002875/0.4361, allocations: 1.588 MB / 0.6599 GB, free: 10.4 MB / 0.4981 GB Notification: Performance of prepare postOptimizeDAE: time 4.231e-05/0.4362, allocations: 37.69 kB / 0.6599 GB, free: 10.36 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.236e-05/0.4362, allocations: 8.594 kB / 0.6599 GB, free: 10.35 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0002084/0.4364, allocations: 111.3 kB / 0.66 GB, free: 10.24 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006939/0.4371, allocations: 195.7 kB / 0.6602 GB, free: 10.05 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002241/0.4394, allocations: 2.364 MB / 0.6625 GB, free: 7.527 MB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001028/0.4404, allocations: 68.39 kB / 0.6626 GB, free: 7.461 MB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.7e-05/0.4405, allocations: 52.06 kB / 0.6626 GB, free: 7.41 MB / 0.4981 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 38 * Number of states: 0 () * Number of discrete variables: 7 (pulse.count,$PRE.pulse.count,pulse.T_start,$PRE.pulse.T_start,$whenCondition1,nRes.y,from_dp.y) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (105): * Single equations (assignments): 101 * Array equations: 1 * Algorithm blocks: 1 * Record equations: 1 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * 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): 1 system {(5,7)} Notification: Performance of prepare postOptimizeDAE: time 0.0002519/0.4408, allocations: 251.8 kB / 0.6629 GB, free: 7.156 MB / 0.4981 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002661/0.4411, allocations: 165.8 kB / 0.663 GB, free: 6.992 MB / 0.4981 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002131/0.4432, allocations: 0.9041 MB / 0.6639 GB, free: 6.078 MB / 0.4981 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.385e-05/0.4432, allocations: 7.938 kB / 0.6639 GB, free: 6.07 MB / 0.4981 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.354e-06/0.4432, allocations: 3.938 kB / 0.6639 GB, free: 6.066 MB / 0.4981 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001592/0.4448, allocations: 0.9076 MB / 0.6648 GB, free: 5.086 MB / 0.4981 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003531/0.4484, allocations: 1.999 MB / 0.6668 GB, free: 3.012 MB / 0.4981 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 8.686e-06/0.4484, allocations: 4 kB / 0.6668 GB, free: 3.008 MB / 0.4981 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0004725/0.4489, allocations: 80 kB / 0.6669 GB, free: 2.93 MB / 0.4981 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0002855/0.4492, allocations: 127.6 kB / 0.667 GB, free: 2.805 MB / 0.4981 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.39e-05/0.4492, allocations: 15.98 kB / 0.667 GB, free: 2.789 MB / 0.4981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.000651/0.4499, allocations: 0.7474 MB / 0.6677 GB, free: 2.016 MB / 0.4981 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.375e-06/0.4499, allocations: 4 kB / 0.6677 GB, free: 2.012 MB / 0.4981 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002586/0.4525, allocations: 1.234 MB / 0.6689 GB, free: 0.7461 MB / 0.4981 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0006971/0.4532, allocations: 314.9 kB / 0.6692 GB, free: 428 kB / 0.4981 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0003782/0.4536, allocations: 12.06 kB / 0.6692 GB, free: 416 kB / 0.4981 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0008457/0.4545, allocations: 43.89 kB / 0.6693 GB, free: 372 kB / 0.4981 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 9.965e-05/0.4546, allocations: 35.95 kB / 0.6693 GB, free: 336 kB / 0.4981 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.737e-05/0.4546, allocations: 23.92 kB / 0.6693 GB, free: 312 kB / 0.4981 GB Notification: Performance of sorting global known variables: time 0.002004/0.4567, allocations: 1.262 MB / 0.6706 GB, free: 15.02 MB / 0.5137 GB Notification: Performance of sort global known variables: time 1.3e-07/0.4567, allocations: 4 kB / 0.6706 GB, free: 15.02 MB / 0.5137 GB Notification: Performance of remove unused functions: time 0.002412/0.4591, allocations: 0.8151 MB / 0.6714 GB, free: 14.2 MB / 0.5137 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 1 (pump_dp.vol.dynBal.U) * 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 (37): * Single equations (assignments): 31 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 3 * When equations: 2 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * 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): 1 system {(5,7)} Notification: Performance of Backend phase and start with SimCode phase: time 0.003735/0.4628, allocations: 2.152 MB / 0.6735 GB, free: 12.02 MB / 0.5137 GB Notification: Performance of simCode: created initialization part: time 0.003727/0.4666, allocations: 1.93 MB / 0.6754 GB, free: 10.06 MB / 0.5137 GB Notification: Performance of simCode: created event and clocks part: time 4.128e-06/0.4666, allocations: 0 / 0.6754 GB, free: 10.06 MB / 0.5137 GB Notification: Performance of simCode: created simulation system equations: time 0.0008463/0.4674, allocations: 344 kB / 0.6757 GB, free: 9.723 MB / 0.5137 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003298/0.4707, allocations: 0.7987 MB / 0.6765 GB, free: 8.969 MB / 0.5137 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02153/0.4923, allocations: 13.5 MB / 0.6897 GB, free: 10.72 MB / 0.5294 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001349/0.4937, allocations: 1.448 MB / 0.6911 GB, free: 9.242 MB / 0.5294 GB Notification: Performance of simCode: alias equations: time 0.001795/0.4955, allocations: 442.6 kB / 0.6915 GB, free: 8.805 MB / 0.5294 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0009258/0.4964, allocations: 0.6398 MB / 0.6921 GB, free: 8.164 MB / 0.5294 GB Notification: Performance of SimCode: time 6.31e-07/0.4964, allocations: 3.938 kB / 0.6921 GB, free: 8.16 MB / 0.5294 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 1.985/2.481, allocations: 46.86 MB / 0.7379 GB, free: 9.812 MB / 0.5762 GB Notification: Performance of buildModelFMU: Generate platform static: time 18.72/21.2, allocations: 3.938 kB / 0.7379 GB, free: 9.809 MB / 0.5762 GB (rm -f IBPSA_latest_IBPSA.Fluid.Examples.Performance.Example2.pipe ; mkfifo IBPSA_latest_IBPSA.Fluid.Examples.Performance.Example2.pipe ; head -c 1048576 < IBPSA_latest_IBPSA.Fluid.Examples.Performance.Example2.pipe >> ../files/IBPSA_latest_IBPSA.Fluid.Examples.Performance.Example2.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator --tempDir=temp_IBPSA_latest_IBPSA_Fluid_Examples_Performance_Example2_fmu --startTime=0 --stopTime=20 --timeout=50 --tolerance=1e-06 IBPSA_latest_IBPSA_Fluid_Examples_Performance_Example2.fmu > IBPSA_latest_IBPSA.Fluid.Examples.Performance.Example2.pipe 2>&1)