Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.RoomWithLatentGain.conf.json
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/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 8.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo)
Running command: translateModel(Buildings.ThermalZones.ReducedOrder.Validation.RoomWithLatentGain,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.RoomWithLatentGain")
translateModel(Buildings.ThermalZones.ReducedOrder.Validation.RoomWithLatentGain,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.RoomWithLatentGain")
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo): time 2.686/2.686, allocations: 287.5 MB / 302.4 MB, free: 8.289 MB / 234.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.002185/0.002185, allocations: 177.4 kB / 371 MB, free: 10.87 MB / 298.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 2.125/2.125, allocations: 205.4 MB / 0.6297 GB, free: 10.61 MB / 458.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.0009275/0.0009271, allocations: 78.42 kB / 0.743 GB, free: 6.621 MB / 0.5573 GB
Notification: Performance of FrontEnd - loaded program: time 0.0006619/0.0006624, allocations: 11.39 kB / 0.8658 GB, free: 140.5 MB / 0.6198 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.2161/0.2168, allocations: 115.3 MB / 0.9783 GB, free: 28.39 MB / 0.6198 GB
Notification: Performance of NFInst.instantiate(Buildings.ThermalZones.ReducedOrder.Validation.RoomWithLatentGain): time 0.9802/1.197, allocations: 183.9 MB / 1.158 GB, free: 4.961 MB / 0.698 GB
Notification: Performance of NFInst.instExpressions: time 0.02392/1.221, allocations: 9.368 MB / 1.167 GB, free: 13.39 MB / 0.7136 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.003586/1.225, allocations: 55.31 kB / 1.167 GB, free: 13.36 MB / 0.7136 GB
Notification: Performance of NFTyping.typeComponents: time 0.006021/1.231, allocations: 2.519 MB / 1.17 GB, free: 12.06 MB / 0.7136 GB
Notification: Performance of NFTyping.typeBindings: time 0.007779/1.239, allocations: 2.31 MB / 1.172 GB, free: 10.59 MB / 0.7136 GB
Notification: Performance of NFTyping.typeClassSections: time 0.00536/1.244, allocations: 1.031 MB / 1.173 GB, free: 9.855 MB / 0.7136 GB
Notification: Performance of NFFlatten.flatten: time 0.008508/1.253, allocations: 4.125 MB / 1.177 GB, free: 7.453 MB / 0.7136 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.003782/1.256, allocations: 1.534 MB / 1.178 GB, free: 6.551 MB / 0.7136 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.004256/1.261, allocations: 1.394 MB / 1.18 GB, free: 5.871 MB / 0.7136 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.004419/1.265, allocations: 1.979 MB / 1.182 GB, free: 4.93 MB / 0.7136 GB
Notification: Performance of NFPackage.collectConstants: time 0.0007381/1.266, allocations: 66.34 kB / 1.182 GB, free: 4.93 MB / 0.7136 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.004221/1.27, allocations: 0.8242 MB / 1.183 GB, free: 4.543 MB / 0.7136 GB
Notification: Performance of NFScalarize.scalarize: time 0.001597/1.272, allocations: 0.7733 MB / 1.183 GB, free: 4.094 MB / 0.7136 GB
Notification: Performance of NFVerifyModel.verify: time 0.001052/1.273, allocations: 0.4984 MB / 1.184 GB, free: 3.777 MB / 0.7136 GB
Notification: Performance of NFConvertDAE.convert: time 0.005447/1.278, allocations: 2.683 MB / 1.186 GB, free: 2.016 MB / 0.7136 GB
Notification: Performance of FrontEnd - DAE generated: time 7.774e-06/1.278, allocations: 0 / 1.186 GB, free: 2.016 MB / 0.7136 GB
Notification: Performance of FrontEnd: time 3.026e-06/1.278, allocations: 0 / 1.186 GB, free: 2.016 MB / 0.7136 GB
Notification: Performance of Transformations before backend: time 0.00017/1.279, allocations: 3 kB / 1.186 GB, free: 2.016 MB / 0.7136 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 312
 * Number of variables: 312
Notification: Performance of Generate backend data structure: time 0.007776/1.286, allocations: 2.829 MB / 1.189 GB, free: 15.93 MB / 0.7292 GB
Notification: Performance of prepare preOptimizeDAE: time 4.635e-05/1.287, allocations: 9.25 kB / 1.189 GB, free: 15.93 MB / 0.7292 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002757/1.289, allocations: 458.2 kB / 1.19 GB, free: 15.71 MB / 0.7292 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.004056/1.293, allocations: 1.419 MB / 1.191 GB, free: 14.66 MB / 0.7292 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.000304/1.294, allocations: 139.1 kB / 1.191 GB, free: 14.57 MB / 0.7292 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.0003912/1.294, allocations: 125.1 kB / 1.191 GB, free: 14.54 MB / 0.7292 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.004604/1.299, allocations: 1.51 MB / 1.193 GB, free: 13.62 MB / 0.7292 GB
Notification: Performance of preOpt findStateOrder (simulation): time 5.514e-05/1.299, allocations: 7.906 kB / 1.193 GB, free: 13.61 MB / 0.7292 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001885/1.299, allocations: 47.44 kB / 1.193 GB, free: 13.58 MB / 0.7292 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 6.499e-05/1.299, allocations: 43.58 kB / 1.193 GB, free: 13.57 MB / 0.7292 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.00398/1.303, allocations: 1.262 MB / 1.194 GB, free: 12.95 MB / 0.7292 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 0.0143/1.317, allocations: 6.434 MB / 1.2 GB, free: 7.715 MB / 0.7292 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.004493/1.322, allocations: 1.347 MB / 1.202 GB, free: 6.781 MB / 0.7292 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.002143/1.324, allocations: 0.6786 MB / 1.202 GB, free: 6.102 MB / 0.7292 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.0006645/1.325, allocations: 304.2 kB / 1.203 GB, free: 5.75 MB / 0.7292 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.002126/1.327, allocations: 0.6765 MB / 1.203 GB, free: 5.062 MB / 0.7292 GB
Notification: Performance of pre-optimization done (n=112): time 4.849e-06/1.327, allocations: 0 / 1.203 GB, free: 5.062 MB / 0.7292 GB
Notification: Performance of matching and sorting (n=112): time 0.009232/1.336, allocations: 2.394 MB / 1.206 GB, free: 2.617 MB / 0.7292 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 7.134e-05/1.336, allocations: 64.41 kB / 1.206 GB, free: 2.543 MB / 0.7292 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.007701/1.344, allocations: 4.01 MB / 1.21 GB, free: 14.52 MB / 0.7448 GB
Notification: Performance of collectPreVariables (initialization): time 0.0002897/1.345, allocations: 49.7 kB / 1.21 GB, free: 14.46 MB / 0.7448 GB
Notification: Performance of collectInitialEqns (initialization): time 0.001841/1.346, allocations: 1.279 MB / 1.211 GB, free: 13.18 MB / 0.7448 GB
Notification: Performance of collectInitialBindings (initialization): time 0.0007322/1.347, allocations: 378.7 kB / 1.211 GB, free: 12.8 MB / 0.7448 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001018/1.347, allocations: 24 kB / 1.211 GB, free: 12.78 MB / 0.7448 GB
Notification: Performance of setup shared object (initialization): time 0.0001982/1.347, allocations: 353.9 kB / 1.212 GB, free: 12.43 MB / 0.7448 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.001605/1.349, allocations: 482.3 kB / 1.212 GB, free: 11.96 MB / 0.7448 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.001865/1.351, allocations: 0.73 MB / 1.213 GB, free: 11.13 MB / 0.7448 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.001811/1.353, allocations: 0.5709 MB / 1.213 GB, free: 10.56 MB / 0.7448 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 8.967e-06/1.353, allocations: 4 kB / 1.213 GB, free: 10.55 MB / 0.7448 GB
Notification: Performance of matching and sorting (n=153) (initialization): time 0.005432/1.358, allocations: 1.721 MB / 1.215 GB, free: 8.82 MB / 0.7448 GB
Notification: Performance of prepare postOptimizeDAE: time 3.868e-05/1.358, allocations: 8 kB / 1.215 GB, free: 8.812 MB / 0.7448 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.073e-05/1.358, allocations: 4 kB / 1.215 GB, free: 8.809 MB / 0.7448 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.00105/1.359, allocations: 223.3 kB / 1.215 GB, free: 8.586 MB / 0.7448 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001835/1.361, allocations: 231.6 kB / 1.215 GB, free: 8.359 MB / 0.7448 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.007164/1.369, allocations: 4.241 MB / 1.22 GB, free: 3.859 MB / 0.7448 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002312/1.371, allocations: 176.2 kB / 1.22 GB, free: 3.688 MB / 0.7448 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002182/1.371, allocations: 52 kB / 1.22 GB, free: 3.637 MB / 0.7448 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 27
 * Number of states: 0 ()
 * Number of discrete variables: 35 ($PRE.assEqu.nFai,assEqu.nFai,$whenCondition8,$whenCondition7,$PRE.intGai.nextTimeEvent,$whenCondition6,$PRE.reference.nextTimeEvent,$whenCondition5,$PRE.outdoorTemp.nextTimeEvent,$whenCondition4,$PRE.tableSolRadWindow.nextTimeEvent,$whenCondition3,$PRE.ventRate.nextTimeEvent,$whenCondition1,$whenCondition2,reference.nextTimeEvent,$PRE.reference.nextTimeEventScaled,reference.nextTimeEventScaled,$PRE.assEqu.satisfied,assEqu.satisfied,$PRE.mean.y,mean.y,intGai.nextTimeEvent,$PRE.intGai.nextTimeEventScaled,intGai.nextTimeEventScaled,outdoorTemp.nextTimeEvent,$PRE.outdoorTemp.nextTimeEventScaled,outdoorTemp.nextTimeEventScaled,tableSolRadWindow.nextTimeEvent,$PRE.tableSolRadWindow.nextTimeEventScaled,tableSolRadWindow.nextTimeEventScaled,greaterThreshold1.y,ventRate.nextTimeEvent,$PRE.ventRate.nextTimeEventScaled,ventRate.nextTimeEventScaled)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (135):
 * Single equations (assignments): 133
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 0
 * Torn equation systems: 2
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 2 {(2,100.0%) 14,(1,100.0%) 3}
 * Non-linear torn systems: 0
Notification: Performance of prepare postOptimizeDAE: time 0.002141/1.373, allocations: 0.8137 MB / 1.221 GB, free: 2.812 MB / 0.7448 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0007177/1.374, allocations: 268.5 kB / 1.221 GB, free: 2.547 MB / 0.7448 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.005282/1.379, allocations: 1.648 MB / 1.222 GB, free: 0.8789 MB / 0.7448 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.715e-05/1.379, allocations: 12 kB / 1.222 GB, free: 0.8672 MB / 0.7448 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 1.192e-05/1.379, allocations: 4 kB / 1.222 GB, free: 0.8633 MB / 0.7448 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.004272/1.384, allocations: 1.444 MB / 1.224 GB, free: 15.36 MB / 0.7605 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.01056/1.394, allocations: 3.566 MB / 1.227 GB, free: 11.71 MB / 0.7605 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 9.598e-06/1.394, allocations: 0 / 1.227 GB, free: 11.71 MB / 0.7605 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001592/1.396, allocations: 175.9 kB / 1.228 GB, free: 11.54 MB / 0.7605 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.0009316/1.397, allocations: 209.5 kB / 1.228 GB, free: 11.33 MB / 0.7605 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0001841/1.397, allocations: 35.92 kB / 1.228 GB, free: 11.29 MB / 0.7605 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.006954/1.404, allocations: 4.188 MB / 1.232 GB, free: 6.84 MB / 0.7605 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.136e-06/1.404, allocations: 0 / 1.232 GB, free: 6.84 MB / 0.7605 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.007209/1.411, allocations: 2.386 MB / 1.234 GB, free: 4.414 MB / 0.7605 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.001416/1.413, allocations: 449.3 kB / 1.235 GB, free: 3.953 MB / 0.7605 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0004606/1.413, allocations: 32.11 kB / 1.235 GB, free: 3.922 MB / 0.7605 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001837/1.415, allocations: 115.8 kB / 1.235 GB, free: 3.809 MB / 0.7605 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0003599/1.416, allocations: 100.8 kB / 1.235 GB, free: 3.711 MB / 0.7605 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.000146/1.416, allocations: 39.98 kB / 1.235 GB, free: 3.672 MB / 0.7605 GB
Notification: Performance of sorting global known variables: time 0.005866/1.422, allocations: 2.912 MB / 1.238 GB, free: 0.7617 MB / 0.7605 GB
Notification: Performance of sort global known variables: time 7.62e-07/1.422, allocations: 0 / 1.238 GB, free: 0.7617 MB / 0.7605 GB
Notification: Performance of remove unused functions: time 0.00268/1.424, allocations: 0.5146 MB / 1.238 GB, free: 252 kB / 0.7605 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 6
 * Number of states: 6 (thermalZoneTwoElements.volMoiAir.dynBal.U,thermalZoneTwoElements.volMoiAir.dynBal.m,thermalZoneTwoElements.volMoiAir.dynBal.mXi[1],thermalZoneTwoElements.extWallRC.thermCapExt[1].T,thermalZoneTwoElements.intWallRC.thermCapInt[1].T,mean.x)
 * Number of discrete variables: 22 ($whenCondition8,$whenCondition7,$whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,intGai.nextTimeEvent,intGai.nextTimeEventScaled,reference.nextTimeEvent,reference.nextTimeEventScaled,outdoorTemp.nextTimeEvent,outdoorTemp.nextTimeEventScaled,tableSolRadWindow.nextTimeEvent,tableSolRadWindow.nextTimeEventScaled,greaterThreshold1.y,ventRate.nextTimeEvent,ventRate.nextTimeEventScaled,assEqu.satisfied,assEqu.nFai,mean.y)
 * Number of discrete states: 13 (intGai.nextTimeEvent,reference.nextTimeEvent,outdoorTemp.nextTimeEvent,tableSolRadWindow.nextTimeEvent,ventRate.nextTimeEvent,mean.x,ventRate.nextTimeEventScaled,tableSolRadWindow.nextTimeEventScaled,outdoorTemp.nextTimeEventScaled,reference.nextTimeEventScaled,assEqu.satisfied,assEqu.nFai,intGai.nextTimeEventScaled)
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for simulation (94):
 * Single equations (assignments): 80
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 12
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 0
 * Torn equation systems: 2
 * Mixed (continuous/discrete) equation systems: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 2 {(2,100.0%) 14,(1,100.0%) 3}
 * Non-linear torn systems: 0
Notification: Performance of Backend phase and start with SimCode phase: time 0.001989/1.426, allocations: 0.5878 MB / 1.239 GB, free: 15.84 MB / 0.7761 GB
Notification: Performance of simCode: created initialization part: time 0.004774/1.431, allocations: 1.507 MB / 1.24 GB, free: 14.31 MB / 0.7761 GB
Notification: Performance of simCode: created event and clocks part: time 6.142e-06/1.431, allocations: 4.062 kB / 1.24 GB, free: 14.31 MB / 0.7761 GB
Notification: Performance of simCode: created simulation system equations: time 0.002812/1.434, allocations: 0.9247 MB / 1.241 GB, free: 13.36 MB / 0.7761 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.005149/1.439, allocations: 0.557 MB / 1.242 GB, free: 12.81 MB / 0.7761 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01816/1.458, allocations: 6.4 MB / 1.248 GB, free: 6.355 MB / 0.7761 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.005237/1.463, allocations: 1.918 MB / 1.25 GB, free: 4.41 MB / 0.7761 GB
Notification: Performance of simCode: alias equations: time 0.003099/1.466, allocations: 310.7 kB / 1.25 GB, free: 4.102 MB / 0.7761 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0006274/1.467, allocations: 115.4 kB / 1.25 GB, free: 3.988 MB / 0.7761 GB
Notification: Performance of SimCode: time 1.352e-06/1.467, allocations: 0 / 1.25 GB, free: 3.988 MB / 0.7761 GB
Notification: Performance of Templates: time 0.07462/1.541, allocations: 23.24 MB / 1.273 GB, free: 12.95 MB / 0.8073 GB
make -j1 -f Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.RoomWithLatentGain.makefile
(rm -f Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.RoomWithLatentGain.pipe ; mkfifo Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.RoomWithLatentGain.pipe ; head -c 1048576 < Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.RoomWithLatentGain.pipe >> ../files/Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.RoomWithLatentGain.sim & ./Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.RoomWithLatentGain -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8.0.0_Buildings.ThermalZones.ReducedOrder.Validation.RoomWithLatentGain.pipe 2>&1)