Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_3.0.0_Buildings.Electrical.DC.Sources.Examples.WindTurbine.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/Buildings 12.0.0-master/package.mo", uses=false) Using package Buildings with version 12.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.0.0-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: translateModel(Buildings.Electrical.DC.Sources.Examples.WindTurbine,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_3.0.0_Buildings.Electrical.DC.Sources.Examples.WindTurbine") translateModel(Buildings.Electrical.DC.Sources.Examples.WindTurbine,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_3.0.0_Buildings.Electrical.DC.Sources.Examples.WindTurbine") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.00149/0.00149, allocations: 111.3 kB / 15.23 MB, free: 0.6602 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001821/0.001821, allocations: 193 kB / 16.13 MB, free: 6.664 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.41/1.41, allocations: 222.9 MB / 239.8 MB, free: 4.555 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.0.0-master/package.mo): time 2.843/2.843, allocations: 472.6 MB / 0.7447 GB, free: 4.961 MB / 0.5919 GB Notification: Performance of FrontEnd - loaded program: time 0.00212/0.00212, allocations: 69.91 kB / 0.9113 GB, free: 33.61 MB / 0.7169 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3852/0.3874, allocations: 159.9 MB / 1.068 GB, free: 10.96 MB / 0.8262 GB Notification: Performance of NFInst.instantiate(Buildings.Electrical.DC.Sources.Examples.WindTurbine): time 0.01026/0.3977, allocations: 7.452 MB / 1.075 GB, free: 3.473 MB / 0.8262 GB Notification: Performance of NFInst.instExpressions: time 0.1832/0.581, allocations: 149.6 MB / 1.221 GB, free: 13.32 MB / 0.9825 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001905/0.583, allocations: 31.81 kB / 1.221 GB, free: 13.29 MB / 0.9825 GB Notification: Performance of NFTyping.typeComponents: time 0.002626/0.5856, allocations: 0.6146 MB / 1.221 GB, free: 12.67 MB / 0.9825 GB Notification: Performance of NFTyping.typeBindings: time 0.003295/0.5889, allocations: 0.6918 MB / 1.222 GB, free: 11.98 MB / 0.9825 GB Notification: Performance of NFTyping.typeClassSections: time 0.003327/0.5923, allocations: 0.9185 MB / 1.223 GB, free: 11.07 MB / 0.9825 GB Notification: Performance of NFFlatten.flatten: time 0.003266/0.5955, allocations: 1.935 MB / 1.225 GB, free: 9.125 MB / 0.9825 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002479/0.598, allocations: 1.006 MB / 1.226 GB, free: 8.082 MB / 0.9825 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001346/0.5994, allocations: 0.5602 MB / 1.226 GB, free: 7.52 MB / 0.9825 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001558/0.601, allocations: 0.7157 MB / 1.227 GB, free: 6.801 MB / 0.9825 GB Notification: Performance of NFPackage.collectConstants: time 0.0004613/0.6015, allocations: 72 kB / 1.227 GB, free: 6.73 MB / 0.9825 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001734/0.6032, allocations: 0.6047 MB / 1.228 GB, free: 6.125 MB / 0.9825 GB Notification: Performance of NFScalarize.scalarize: time 0.0006342/0.6039, allocations: 370.6 kB / 1.228 GB, free: 5.762 MB / 0.9825 GB Notification: Performance of NFVerifyModel.verify: time 0.001409/0.6053, allocations: 0.6564 MB / 1.229 GB, free: 5.102 MB / 0.9825 GB Notification: Performance of NFConvertDAE.convert: time 0.003547/0.6088, allocations: 2.036 MB / 1.231 GB, free: 3.059 MB / 0.9825 GB Notification: Performance of FrontEnd - DAE generated: time 6.552e-06/0.6089, allocations: 0 / 1.231 GB, free: 3.059 MB / 0.9825 GB Notification: Performance of FrontEnd: time 1.062e-06/0.6089, allocations: 0 / 1.231 GB, free: 3.059 MB / 0.9825 GB Notification: Performance of Transformations before backend: time 8.126e-05/0.609, allocations: 4 kB / 1.231 GB, free: 3.055 MB / 0.9825 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 273 * Number of variables: 273 Notification: Performance of Generate backend data structure: time 0.004822/0.6138, allocations: 1.795 MB / 1.233 GB, free: 1.203 MB / 0.9825 GB Notification: Performance of prepare preOptimizeDAE: time 5.734e-05/0.6139, allocations: 12.03 kB / 1.233 GB, free: 1.191 MB / 0.9825 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001709/0.6156, allocations: 274.7 kB / 1.233 GB, free: 0.9219 MB / 0.9825 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002141/0.6177, allocations: 0.9452 MB / 1.234 GB, free: 15.93 MB / 0.9981 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.000102/0.6179, allocations: 78.09 kB / 1.234 GB, free: 15.86 MB / 0.9981 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002356/0.6181, allocations: 103.9 kB / 1.234 GB, free: 15.75 MB / 0.9981 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002594/0.6207, allocations: 1.233 MB / 1.235 GB, free: 14.44 MB / 0.9981 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.559e-05/0.6207, allocations: 0 / 1.235 GB, free: 14.44 MB / 0.9981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001324/0.6209, allocations: 51.98 kB / 1.235 GB, free: 14.39 MB / 0.9981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 7.983e-05/0.621, allocations: 58 kB / 1.235 GB, free: 14.33 MB / 0.9981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002457/0.6234, allocations: 1.342 MB / 1.237 GB, free: 12.98 MB / 0.9981 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.007938/0.6314, allocations: 4.669 MB / 1.241 GB, free: 8.043 MB / 0.9981 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001871/0.6333, allocations: 0.9031 MB / 1.242 GB, free: 7.133 MB / 0.9981 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0007377/0.6341, allocations: 367.7 kB / 1.242 GB, free: 6.773 MB / 0.9981 GB Notification: Performance of preOpt evalFunc (simulation): time 8.856e-05/0.6342, allocations: 28.97 kB / 1.242 GB, free: 6.746 MB / 0.9981 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.001018/0.6352, allocations: 0.5421 MB / 1.243 GB, free: 6.176 MB / 0.9981 GB Notification: Performance of pre-optimization done (n=89): time 4.178e-06/0.6352, allocations: 0 / 1.243 GB, free: 6.176 MB / 0.9981 GB Notification: Performance of matching and sorting (n=89): time 0.003157/0.6384, allocations: 1.204 MB / 1.244 GB, free: 4.945 MB / 0.9981 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.00019/0.6386, allocations: 303.7 kB / 1.244 GB, free: 4.578 MB / 0.9981 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002041/0.6407, allocations: 0.9613 MB / 1.245 GB, free: 3.594 MB / 0.9981 GB Notification: Performance of collectPreVariables (initialization): time 0.0001176/0.6408, allocations: 41.7 kB / 1.245 GB, free: 3.547 MB / 0.9981 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006889/0.6415, allocations: 0.5428 MB / 1.246 GB, free: 2.996 MB / 0.9981 GB Notification: Performance of collectInitialBindings (initialization): time 0.0003628/0.6419, allocations: 295.8 kB / 1.246 GB, free: 2.703 MB / 0.9981 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0004063/0.6423, allocations: 194.4 kB / 1.246 GB, free: 2.508 MB / 0.9981 GB Notification: Performance of setup shared object (initialization): time 0.0001953/0.6425, allocations: 345.9 kB / 1.247 GB, free: 2.164 MB / 0.9981 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006653/0.6432, allocations: 304.7 kB / 1.247 GB, free: 1.863 MB / 0.9981 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0008445/0.644, allocations: 472.5 kB / 1.247 GB, free: 1.355 MB / 0.9981 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001439/0.6455, allocations: 0.7363 MB / 1.248 GB, free: 0.582 MB / 0.9981 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 9.838e-06/0.6455, allocations: 3.938 kB / 1.248 GB, free: 0.5781 MB / 0.9981 GB Notification: Performance of matching and sorting (n=116) (initialization): time 0.6155/1.261, allocations: 0.9568 MB / 1.249 GB, free: 183 MB / 0.9981 GB Notification: Performance of prepare postOptimizeDAE: time 2.555e-05/1.261, allocations: 6.875 kB / 1.249 GB, free: 183 MB / 0.9981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.19e-05/1.261, allocations: 2.312 kB / 1.249 GB, free: 183 MB / 0.9981 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0002347/1.261, allocations: 30.14 kB / 1.249 GB, free: 183 MB / 0.9981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008595/1.262, allocations: 197.5 kB / 1.249 GB, free: 183 MB / 0.9981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0008881/1.263, allocations: 1.292 MB / 1.251 GB, free: 181.8 MB / 0.9981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001017/1.264, allocations: 114.1 kB / 1.251 GB, free: 181.8 MB / 0.9981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.307e-05/1.264, allocations: 42.86 kB / 1.251 GB, free: 181.8 MB / 0.9981 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001109/1.265, allocations: 0.5561 MB / 1.251 GB, free: 181.7 MB / 0.9981 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0007939/1.266, allocations: 484.9 kB / 1.252 GB, free: 181.6 MB / 0.9981 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001313/1.267, allocations: 0.7358 MB / 1.252 GB, free: 181.4 MB / 0.9981 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 4.148e-06/1.267, allocations: 0.7812 kB / 1.252 GB, free: 181.4 MB / 0.9981 GB Notification: Performance of matching and sorting (n=116) (initialization_lambda0): time 0.001862/1.269, allocations: 0.9407 MB / 1.253 GB, free: 181.4 MB / 0.9981 GB Notification: Performance of prepare postOptimizeDAE: time 1.26e-05/1.269, allocations: 6.094 kB / 1.253 GB, free: 181.4 MB / 0.9981 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.803e-06/1.269, allocations: 5.781 kB / 1.253 GB, free: 181.4 MB / 0.9981 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.175e-05/1.269, allocations: 7.891 kB / 1.253 GB, free: 181.4 MB / 0.9981 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008106/1.27, allocations: 202.2 kB / 1.254 GB, free: 181.4 MB / 0.9981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.206e-05/1.27, allocations: 12.45 kB / 1.254 GB, free: 181.4 MB / 0.9981 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0009256/1.271, allocations: 108.2 kB / 1.254 GB, free: 181.4 MB / 0.9981 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.167e-05/1.271, allocations: 43.3 kB / 1.254 GB, free: 181.4 MB / 0.9981 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 12 * Number of states: 0 () * Number of discrete variables: 17 (weaDat.conTim.canRepeatWeatherFile,weaDat.conTimMin.canRepeatWeatherFile,weaDat.decAng.tNext,$PRE.weaDat.decAng.tNext,weaDat.eqnTim.tNext,$PRE.weaDat.eqnTim.tNext,weaDat.conTim.tNext,$PRE.weaDat.conTim.tNext,weaDat.conTimMin.tNext,$PRE.weaDat.conTimMin.tNext,weaDat.locTim.tNext,$PRE.weaDat.locTim.tNext,$whenCondition1,$whenCondition2,$whenCondition3,$whenCondition4,$whenCondition5) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (115): * Single equations (assignments): 114 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * 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 {(1,1)} Notification: Performance of prepare postOptimizeDAE: time 0.0003082/1.272, allocations: 245.7 kB / 1.254 GB, free: 181.2 MB / 0.9981 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002063/1.272, allocations: 117.6 kB / 1.254 GB, free: 181.2 MB / 0.9981 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002227/1.274, allocations: 1.066 MB / 1.255 GB, free: 181.1 MB / 0.9981 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.251e-05/1.274, allocations: 11.16 kB / 1.255 GB, free: 181.1 MB / 0.9981 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.418e-06/1.274, allocations: 5.438 kB / 1.255 GB, free: 181.1 MB / 0.9981 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.259e-05/1.274, allocations: 6.047 kB / 1.255 GB, free: 181.1 MB / 0.9981 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003177/1.277, allocations: 2.376 MB / 1.257 GB, free: 180.5 MB / 0.9981 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.338e-06/1.277, allocations: 0 / 1.257 GB, free: 180.5 MB / 0.9981 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0006204/1.278, allocations: 161.9 kB / 1.258 GB, free: 180.4 MB / 0.9981 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0001176/1.278, allocations: 34.41 kB / 1.258 GB, free: 180.4 MB / 0.9981 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 5.623e-05/1.278, allocations: 27.22 kB / 1.258 GB, free: 180.4 MB / 0.9981 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0007323/1.279, allocations: 1.282 MB / 1.259 GB, free: 179.2 MB / 0.9981 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.424e-06/1.279, allocations: 3 kB / 1.259 GB, free: 179.2 MB / 0.9981 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001576/1.28, allocations: 1.044 MB / 1.26 GB, free: 178.9 MB / 0.9981 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0004257/1.281, allocations: 311.4 kB / 1.26 GB, free: 178.7 MB / 0.9981 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001561/1.281, allocations: 21.62 kB / 1.26 GB, free: 178.7 MB / 0.9981 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0007452/1.282, allocations: 70.97 kB / 1.26 GB, free: 178.7 MB / 0.9981 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001486/1.282, allocations: 74.48 kB / 1.26 GB, free: 178.7 MB / 0.9981 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.376e-05/1.282, allocations: 36.25 kB / 1.26 GB, free: 178.7 MB / 0.9981 GB Notification: Performance of sorting global known variables: time 0.000829/1.283, allocations: 0.6691 MB / 1.261 GB, free: 178.6 MB / 0.9981 GB Notification: Performance of sort global known variables: time 2.91e-07/1.283, allocations: 3.344 kB / 1.261 GB, free: 178.6 MB / 0.9981 GB Notification: Performance of remove unused functions: time 0.001614/1.284, allocations: 0.602 MB / 1.262 GB, free: 178.4 MB / 0.9981 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * Number of states: 0 () * Number of discrete variables: 10 ($whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,weaDat.locTim.tNext,weaDat.conTimMin.tNext,weaDat.conTim.tNext,weaDat.eqnTim.tNext,weaDat.decAng.tNext) * Number of discrete states: 5 (weaDat.conTimMin.tNext,weaDat.decAng.tNext,weaDat.eqnTim.tNext,weaDat.conTim.tNext,weaDat.locTim.tNext) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (101): * Single equations (assignments): 95 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 5 * 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 {(1,1)} Notification: Performance of Backend phase and start with SimCode phase: time 0.00153/1.286, allocations: 0.6536 MB / 1.262 GB, free: 178.2 MB / 0.9981 GB Notification: Performance of simCode: created initialization part: time 0.002452/1.288, allocations: 1.339 MB / 1.264 GB, free: 177.7 MB / 0.9981 GB Notification: Performance of simCode: created event and clocks part: time 5.09e-06/1.288, allocations: 9.266 kB / 1.264 GB, free: 177.7 MB / 0.9981 GB Notification: Performance of simCode: created simulation system equations: time 0.0007693/1.289, allocations: 0.5235 MB / 1.264 GB, free: 177.5 MB / 0.9981 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001488/1.291, allocations: 341.4 kB / 1.264 GB, free: 177.4 MB / 0.9981 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003997/1.295, allocations: 2.723 MB / 1.267 GB, free: 175.7 MB / 0.9981 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0008976/1.296, allocations: 1.168 MB / 1.268 GB, free: 175 MB / 0.9981 GB Notification: Performance of simCode: alias equations: time 0.001551/1.297, allocations: 411 kB / 1.269 GB, free: 174.9 MB / 0.9981 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003329/1.298, allocations: 127.6 kB / 1.269 GB, free: 174.9 MB / 0.9981 GB Notification: Performance of SimCode: time 6.61e-07/1.298, allocations: 0 / 1.269 GB, free: 174.9 MB / 0.9981 GB Notification: Performance of Templates: time 0.03262/1.33, allocations: 16.66 MB / 1.285 GB, free: 170.6 MB / 0.9981 GB make -j1 -f Buildings_3.0.0_Buildings.Electrical.DC.Sources.Examples.WindTurbine.makefile (rm -f Buildings_3.0.0_Buildings.Electrical.DC.Sources.Examples.WindTurbine.pipe ; mkfifo Buildings_3.0.0_Buildings.Electrical.DC.Sources.Examples.WindTurbine.pipe ; head -c 1048576 < Buildings_3.0.0_Buildings.Electrical.DC.Sources.Examples.WindTurbine.pipe >> ../files/Buildings_3.0.0_Buildings.Electrical.DC.Sources.Examples.WindTurbine.sim & ./Buildings_3.0.0_Buildings.Electrical.DC.Sources.Examples.WindTurbine -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_3.0.0_Buildings.Electrical.DC.Sources.Examples.WindTurbine.pipe 2>&1)