Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_7.0.0_Buildings.Utilities.Plotters.Examples.ControlsVerification_CoolingCoilValve.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.1/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+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/ModelicaServices 3.2.3+maint.om/package.mo", uses=false) Using package ModelicaServices with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/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 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo) Using package Buildings with version 7.0.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.1/package.mo) Running command: translateModel(Buildings.Utilities.Plotters.Examples.ControlsVerification_CoolingCoilValve,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_7.0.0_Buildings.Utilities.Plotters.Examples.ControlsVerification_CoolingCoilValve") translateModel(Buildings.Utilities.Plotters.Examples.ControlsVerification_CoolingCoilValve,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_7.0.0_Buildings.Utilities.Plotters.Examples.ControlsVerification_CoolingCoilValve") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.1/package.mo): time 3.813/3.813, allocations: 251.1 MB / 266.7 MB, free: 11.53 MB / 218.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.002552/0.002552, allocations: 170.4 kB / 326.2 MB, free: 2.832 MB / 250.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 4.15/4.15, allocations: 205.4 MB / 0.5772 GB, free: 20.72 MB / 426.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.001424/0.001424, allocations: 88.59 kB / 0.6817 GB, free: 13.6 MB / 0.5105 GB Notification: Performance of FrontEnd - loaded program: time 0.00077/0.0007704, allocations: 12.06 kB / 0.7957 GB, free: 135.5 MB / 0.6042 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3531/0.3539, allocations: 106.3 MB / 0.8995 GB, free: 65.5 MB / 0.6042 GB Notification: Performance of FrontEnd - scodeFlatten: time 0.3782/0.7322, allocations: 146.3 MB / 1.042 GB, free: 14.96 MB / 0.698 GB Notification: Performance of FrontEnd - mkProgramGraph: time 0.0004827/0.7328, allocations: 95.95 kB / 1.042 GB, free: 14.87 MB / 0.698 GB Notification: Performance of FrontEnd - DAE generated: time 1.093/1.826, allocations: 33.42 MB / 1.075 GB, free: 145.5 MB / 0.698 GB Notification: Performance of FrontEnd: time 4.519e-06/1.826, allocations: 0 / 1.075 GB, free: 145.5 MB / 0.698 GB Notification: Performance of Transformations before backend: time 0.0002899/1.826, allocations: 27.47 kB / 1.075 GB, free: 145.5 MB / 0.698 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 171 * Number of variables: 171 Notification: Performance of Generate backend data structure: time 0.008101/1.834, allocations: 1.622 MB / 1.077 GB, free: 144.5 MB / 0.698 GB Notification: Performance of prepare preOptimizeDAE: time 6.276e-05/1.834, allocations: 10.06 kB / 1.077 GB, free: 144.5 MB / 0.698 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001252/1.836, allocations: 148 kB / 1.077 GB, free: 144.4 MB / 0.698 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.005743/1.841, allocations: 0.8813 MB / 1.078 GB, free: 144.1 MB / 0.698 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0002422/1.842, allocations: 65.06 kB / 1.078 GB, free: 144.1 MB / 0.698 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.000613/1.842, allocations: 85.97 kB / 1.078 GB, free: 144.1 MB / 0.698 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.004186/1.846, allocations: 0.7842 MB / 1.079 GB, free: 143.9 MB / 0.698 GB Notification: Performance of preOpt findStateOrder (simulation): time 4.185e-05/1.847, allocations: 0 / 1.079 GB, free: 143.9 MB / 0.698 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.000204/1.847, allocations: 32.22 kB / 1.079 GB, free: 143.9 MB / 0.698 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.49e-05/1.847, allocations: 17.12 kB / 1.079 GB, free: 143.9 MB / 0.698 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.003548/1.85, allocations: 0.5118 MB / 1.079 GB, free: 143.9 MB / 0.698 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.01269/1.863, allocations: 2.279 MB / 1.081 GB, free: 143.1 MB / 0.698 GB Notification: Performance of preOpt comSubExp (simulation): time 0.005403/1.869, allocations: 0.7111 MB / 1.082 GB, free: 143 MB / 0.698 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001698/1.87, allocations: 302.5 kB / 1.082 GB, free: 142.9 MB / 0.698 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0001034/1.871, allocations: 14.33 kB / 1.082 GB, free: 142.9 MB / 0.698 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.002146/1.873, allocations: 478.8 kB / 1.083 GB, free: 142.7 MB / 0.698 GB Notification: Performance of pre-optimization done (n=82): time 6.562e-06/1.873, allocations: 0 / 1.083 GB, free: 142.7 MB / 0.698 GB Notification: Performance of matching and sorting (n=82): time 0.006137/1.879, allocations: 1.064 MB / 1.084 GB, free: 142.5 MB / 0.698 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001998/1.879, allocations: 304.3 kB / 1.084 GB, free: 142.1 MB / 0.698 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.003873/1.883, allocations: 0.9323 MB / 1.085 GB, free: 141.8 MB / 0.698 GB Notification: Performance of collectPreVariables (initialization): time 0.0005155/1.884, allocations: 60.28 kB / 1.085 GB, free: 141.8 MB / 0.698 GB Notification: Performance of collectInitialEqns (initialization): time 0.0009538/1.885, allocations: 493.1 kB / 1.086 GB, free: 141.6 MB / 0.698 GB Notification: Performance of collectInitialBindings (initialization): time 0.0006267/1.885, allocations: 226.3 kB / 1.086 GB, free: 141.4 MB / 0.698 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002129/1.886, allocations: 22.78 kB / 1.086 GB, free: 141.4 MB / 0.698 GB Notification: Performance of setup shared object (initialization): time 0.0001656/1.886, allocations: 340.1 kB / 1.086 GB, free: 141.1 MB / 0.698 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001747/1.888, allocations: 280.7 kB / 1.086 GB, free: 141 MB / 0.698 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.002218/1.89, allocations: 0.5749 MB / 1.087 GB, free: 140.6 MB / 0.698 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001748/1.892, allocations: 435.9 kB / 1.087 GB, free: 140.3 MB / 0.698 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.47e-05/1.892, allocations: 3.688 kB / 1.087 GB, free: 140.3 MB / 0.698 GB Notification: Performance of matching and sorting (n=117) (initialization): time 0.005023/1.897, allocations: 1.106 MB / 1.089 GB, free: 139.7 MB / 0.698 GB Notification: Performance of prepare postOptimizeDAE: time 0.0003453/1.897, allocations: 358.3 kB / 1.089 GB, free: 139.3 MB / 0.698 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.3e-05/1.897, allocations: 7.812 kB / 1.089 GB, free: 139.3 MB / 0.698 GB Notification: Performance of postOpt tearingSystem (initialization): time 4.471e-05/1.897, allocations: 11.66 kB / 1.089 GB, free: 139.3 MB / 0.698 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001526/1.899, allocations: 160.5 kB / 1.089 GB, free: 139.3 MB / 0.698 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 3.084e-05/1.899, allocations: 11.78 kB / 1.089 GB, free: 139.3 MB / 0.698 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002036/1.901, allocations: 121.9 kB / 1.089 GB, free: 139.2 MB / 0.698 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002088/1.901, allocations: 46.98 kB / 1.089 GB, free: 139.2 MB / 0.698 GB Notification: Performance of prepare postOptimizeDAE: time 2.029e-05/1.901, allocations: 7.891 kB / 1.089 GB, free: 139.2 MB / 0.698 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.004189/1.905, allocations: 0.9633 MB / 1.09 GB, free: 138.7 MB / 0.698 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.029e-05/1.905, allocations: 4.031 kB / 1.09 GB, free: 138.7 MB / 0.698 GB Notification: Performance of postOpt tearingSystem (initialization): time 3.046e-05/1.906, allocations: 11.19 kB / 1.09 GB, free: 138.7 MB / 0.698 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.00136/1.907, allocations: 156.3 kB / 1.09 GB, free: 138.6 MB / 0.698 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 3.07e-05/1.907, allocations: 15.47 kB / 1.09 GB, free: 138.6 MB / 0.698 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002076/1.909, allocations: 108.9 kB / 1.09 GB, free: 138.5 MB / 0.698 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002922/1.909, allocations: 45.08 kB / 1.09 GB, free: 138.5 MB / 0.698 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 24 * Number of states: 0 () * Number of discrete variables: 67 ($PRE.timSerRes.timeConverted,timSerRes.timeConverted,$PRE.timSerInp.timeConverted,timSerInp.timeConverted,$PRE.csvWriter.str,csvWriter.str,$whenCondition10,$PRE.TOut_F.nextTimeEvent,$whenCondition9,$PRE.TSupSetpoint_F.nextTimeEvent,$whenCondition8,$PRE.coolingValveSignal.nextTimeEvent,$whenCondition7,$PRE.fanFeedback.nextTimeEvent,$whenCondition6,$PRE.fanStatus.nextTimeEvent,$whenCondition5,$PRE.TSupply_F.nextTimeEvent,$whenCondition12,$whenCondition4,$whenCondition3,$whenCondition2,$PRE.plotConfiguration.tActivateLast,plotConfiguration.tActivateLast,correlation.active,$PRE.correlation.tActivateLast,correlation.tActivateLast,correlation.sampleTrigger,timSerRes.active,$PRE.timSerRes.tActivateLast,timSerRes.tActivateLast,timSerRes.sampleTrigger,timSerInp.active,timSerInp.activate_internal,$PRE.timSerInp.tActivateLast,timSerInp.tActivateLast,timSerInp.sampleTrigger,$whenCondition1,csvWriter.sampleTrigger,coolingValveSignal.nextTimeEvent,$PRE.coolingValveSignal.nextTimeEventScaled,coolingValveSignal.nextTimeEventScaled,plotConfiguration.activate_internal,$whenCondition11,TOut_F.nextTimeEvent,$PRE.TOut_F.nextTimeEventScaled,TOut_F.nextTimeEventScaled,TSupSetpoint_F.nextTimeEvent,$PRE.TSupSetpoint_F.nextTimeEventScaled,TSupSetpoint_F.nextTimeEventScaled,fanFeedback.nextTimeEvent,$PRE.fanFeedback.nextTimeEventScaled,fanFeedback.nextTimeEventScaled,fanStatus.nextTimeEvent,$PRE.fanStatus.nextTimeEventScaled,fanStatus.nextTimeEventScaled,TSupply_F.nextTimeEvent,$PRE.TSupply_F.nextTimeEventScaled,TSupply_F.nextTimeEventScaled,cooValSta.uFanSta,cooValSta.limPI.trigger,$PRE.cooValSta.TOutThr.y,cooValSta.TOutThr.y,$PRE.cooValSta.uFanFeeThr.y,cooValSta.uFanFeeThr.y,$PRE.cooValSta.cha.u,cooValSta.cha.u) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (117): * Single equations (assignments): 113 * Array equations: 0 * Algorithm blocks: 4 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.001596/1.911, allocations: 407.4 kB / 1.091 GB, free: 138.2 MB / 0.698 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0006272/1.912, allocations: 123.5 kB / 1.091 GB, free: 138.1 MB / 0.698 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.00417/1.916, allocations: 0.9175 MB / 1.092 GB, free: 137.6 MB / 0.698 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.052e-05/1.916, allocations: 11.94 kB / 1.092 GB, free: 137.6 MB / 0.698 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.352e-05/1.916, allocations: 3.969 kB / 1.092 GB, free: 137.6 MB / 0.698 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 2.081e-05/1.916, allocations: 3.984 kB / 1.092 GB, free: 137.6 MB / 0.698 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.008156/1.924, allocations: 1.97 MB / 1.094 GB, free: 136.4 MB / 0.698 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.25e-05/1.924, allocations: 0 / 1.094 GB, free: 136.4 MB / 0.698 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0008919/1.925, allocations: 88.45 kB / 1.094 GB, free: 136.3 MB / 0.698 GB Notification: Performance of postOpt tearingSystem (simulation): time 1.368e-05/1.925, allocations: 7.875 kB / 1.094 GB, free: 136.3 MB / 0.698 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001826/1.925, allocations: 19.86 kB / 1.094 GB, free: 136.3 MB / 0.698 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.418e-05/1.926, allocations: 7.953 kB / 1.094 GB, free: 136.3 MB / 0.698 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 6.161e-06/1.926, allocations: 3.938 kB / 1.094 GB, free: 136.3 MB / 0.698 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.005567/1.931, allocations: 1.331 MB / 1.095 GB, free: 135.6 MB / 0.698 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001169/1.932, allocations: 293.2 kB / 1.096 GB, free: 135.4 MB / 0.698 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0003778/1.933, allocations: 31.08 kB / 1.096 GB, free: 135.3 MB / 0.698 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00121/1.934, allocations: 59.08 kB / 1.096 GB, free: 135.3 MB / 0.698 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0003616/1.934, allocations: 83.91 kB / 1.096 GB, free: 135.3 MB / 0.698 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0001713/1.935, allocations: 39.22 kB / 1.096 GB, free: 135.2 MB / 0.698 GB Notification: Performance of sorting global known variables: time 0.001915/1.937, allocations: 0.6231 MB / 1.096 GB, free: 134.9 MB / 0.698 GB Notification: Performance of sort global known variables: time 7.72e-07/1.937, allocations: 3.844 kB / 1.096 GB, free: 134.9 MB / 0.698 GB Notification: Performance of remove unused functions: time 0.003438/1.94, allocations: 431 kB / 1.097 GB, free: 134.8 MB / 0.698 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 1 (cooValSta.limPI.I.y) * Number of discrete variables: 44 (cooValSta.limPI.trigger,correlation.sampleTrigger,timSerRes.sampleTrigger,timSerInp.sampleTrigger,timSerInp.activate_internal,$whenCondition12,$whenCondition11,$whenCondition10,$whenCondition9,$whenCondition8,$whenCondition7,$whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,TOut_F.nextTimeEvent,TOut_F.nextTimeEventScaled,TSupSetpoint_F.nextTimeEvent,TSupSetpoint_F.nextTimeEventScaled,coolingValveSignal.nextTimeEvent,coolingValveSignal.nextTimeEventScaled,fanFeedback.nextTimeEvent,fanFeedback.nextTimeEventScaled,fanStatus.nextTimeEvent,fanStatus.nextTimeEventScaled,TSupply_F.nextTimeEvent,TSupply_F.nextTimeEventScaled,cooValSta.uFanSta,cooValSta.TOutThr.y,cooValSta.uFanFeeThr.y,cooValSta.cha.u,csvWriter.str,csvWriter.sampleTrigger,plotConfiguration.tActivateLast,correlation.active,correlation.tActivateLast,timSerRes.active,timSerRes.tActivateLast,timSerRes.timeConverted,timSerInp.active,timSerInp.tActivateLast,timSerInp.timeConverted) * Number of discrete states: 17 (TOut_F.nextTimeEvent,TSupSetpoint_F.nextTimeEvent,coolingValveSignal.nextTimeEvent,fanFeedback.nextTimeEvent,fanStatus.nextTimeEvent,TSupply_F.nextTimeEvent,TSupply_F.nextTimeEventScaled,fanStatus.nextTimeEventScaled,fanFeedback.nextTimeEventScaled,cooValSta.uFanFeeThr.y,coolingValveSignal.nextTimeEventScaled,TSupSetpoint_F.nextTimeEventScaled,TOut_F.nextTimeEventScaled,cooValSta.TOutThr.y,cooValSta.cha.u,csvWriter.str,$whenCondition1) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (88): * Single equations (assignments): 69 * Array equations: 0 * Algorithm blocks: 1 * Record equations: 0 * When equations: 18 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.002517/1.943, allocations: 0.5635 MB / 1.097 GB, free: 134.5 MB / 0.698 GB Notification: Performance of simCode: created initialization part: time 0.006054/1.949, allocations: 1.568 MB / 1.099 GB, free: 133.5 MB / 0.698 GB Notification: Performance of simCode: created event and clocks part: time 1.138e-05/1.949, allocations: 4.188 kB / 1.099 GB, free: 133.5 MB / 0.698 GB Notification: Performance of simCode: created simulation system equations: time 0.001925/1.951, allocations: 426.7 kB / 1.099 GB, free: 133.3 MB / 0.698 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003812/1.955, allocations: 304.1 kB / 1.1 GB, free: 133.1 MB / 0.698 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.007472/1.962, allocations: 2.051 MB / 1.102 GB, free: 131 MB / 0.698 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.00098/1.963, allocations: 1.071 MB / 1.103 GB, free: 129.9 MB / 0.698 GB Notification: Performance of simCode: alias equations: time 0.002139/1.965, allocations: 220.5 kB / 1.103 GB, free: 129.7 MB / 0.698 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000776/1.966, allocations: 115.4 kB / 1.103 GB, free: 129.5 MB / 0.698 GB Notification: Performance of SimCode: time 1.883e-06/1.966, allocations: 0 / 1.103 GB, free: 129.5 MB / 0.698 GB Notification: Performance of Templates: time 0.06563/2.032, allocations: 15.75 MB / 1.118 GB, free: 113.9 MB / 0.698 GB make -j1 -f Buildings_7.0.0_Buildings.Utilities.Plotters.Examples.ControlsVerification_CoolingCoilValve.makefile (rm -f Buildings_7.0.0_Buildings.Utilities.Plotters.Examples.ControlsVerification_CoolingCoilValve.pipe ; mkfifo Buildings_7.0.0_Buildings.Utilities.Plotters.Examples.ControlsVerification_CoolingCoilValve.pipe ; head -c 1048576 < Buildings_7.0.0_Buildings.Utilities.Plotters.Examples.ControlsVerification_CoolingCoilValve.pipe >> ../files/Buildings_7.0.0_Buildings.Utilities.Plotters.Examples.ControlsVerification_CoolingCoilValve.sim & ./Buildings_7.0.0_Buildings.Utilities.Plotters.Examples.ControlsVerification_CoolingCoilValve -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_7.0.0_Buildings.Utilities.Plotters.Examples.ControlsVerification_CoolingCoilValve.pipe 2>&1)