Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8.0.0_Buildings.Fluid.Interfaces.Examples.Humidifier_u.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.Fluid.Interfaces.Examples.Humidifier_u,tolerance=1e-07,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8.0.0_Buildings.Fluid.Interfaces.Examples.Humidifier_u")
translateModel(Buildings.Fluid.Interfaces.Examples.Humidifier_u,tolerance=1e-07,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8.0.0_Buildings.Fluid.Interfaces.Examples.Humidifier_u")
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo): time 2.673/2.673, allocations: 287.5 MB / 302.4 MB, free: 8.293 MB / 234.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.002069/0.002068, allocations: 184.5 kB / 371 MB, free: 10.85 MB / 298.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 2.155/2.155, allocations: 205.4 MB / 0.6297 GB, free: 10.62 MB / 458.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.000965/0.0009646, allocations: 96.89 kB / 0.743 GB, free: 6.602 MB / 0.5573 GB
Notification: Performance of FrontEnd - loaded program: time 0.0006366/0.0006369, allocations: 12.06 kB / 0.8658 GB, free: 140.8 MB / 0.6198 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.227/0.2276, allocations: 115.3 MB / 0.9783 GB, free: 28.37 MB / 0.6198 GB
Notification: Performance of NFInst.instantiate(Buildings.Fluid.Interfaces.Examples.Humidifier_u): time 2.376/2.604, allocations: 0.5341 GB / 1.512 GB, free: 84.76 MB / 0.948 GB
Notification: Performance of NFInst.instExpressions: time 0.07028/2.674, allocations: 33.84 MB / 1.546 GB, free: 84.2 MB / 0.948 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.01148/2.686, allocations: 219.8 kB / 1.546 GB, free: 84.2 MB / 0.948 GB
Notification: Performance of NFTyping.typeComponents: time 0.01386/2.7, allocations: 2.738 MB / 1.548 GB, free: 84.15 MB / 0.948 GB
Notification: Performance of NFTyping.typeBindings: time 0.04569/2.745, allocations: 10.06 MB / 1.558 GB, free: 83.58 MB / 0.948 GB
Notification: Performance of NFTyping.typeClassSections: time 0.01696/2.762, allocations: 3.346 MB / 1.561 GB, free: 82.74 MB / 0.948 GB
Notification: Performance of NFFlatten.flatten: time 0.0347/2.797, allocations: 22.48 MB / 1.583 GB, free: 77.62 MB / 0.948 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.01216/2.809, allocations: 4.734 MB / 1.588 GB, free: 75.79 MB / 0.948 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.02188/2.831, allocations: 6.923 MB / 1.595 GB, free: 73.21 MB / 0.948 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.01407/2.845, allocations: 5.665 MB / 1.6 GB, free: 71.21 MB / 0.948 GB
Notification: Performance of NFPackage.collectConstants: time 0.003089/2.848, allocations: 286.2 kB / 1.601 GB, free: 71.21 MB / 0.948 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.02483/2.873, allocations: 5.275 MB / 1.606 GB, free: 67.07 MB / 0.948 GB
Notification: Performance of NFScalarize.scalarize: time 0.005303/2.879, allocations: 2.26 MB / 1.608 GB, free: 65.26 MB / 0.948 GB
Notification: Performance of NFVerifyModel.verify: time 0.005267/2.884, allocations: 1.587 MB / 1.61 GB, free: 64.18 MB / 0.948 GB
Notification: Performance of NFConvertDAE.convert: time 0.02134/2.905, allocations: 10.6 MB / 1.62 GB, free: 55.21 MB / 0.948 GB
Notification: Performance of FrontEnd - DAE generated: time 5.921e-06/2.905, allocations: 0 / 1.62 GB, free: 55.21 MB / 0.948 GB
Notification: Performance of FrontEnd: time 2.575e-06/2.905, allocations: 0 / 1.62 GB, free: 55.21 MB / 0.948 GB
Notification: Performance of Transformations before backend: time 0.0004241/2.906, allocations: 0 / 1.62 GB, free: 55.21 MB / 0.948 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 1309
 * Number of variables: 1309
Notification: Performance of Generate backend data structure: time 0.03639/2.942, allocations: 7.959 MB / 1.628 GB, free: 47.8 MB / 0.948 GB
Notification: Performance of prepare preOptimizeDAE: time 4.51e-05/2.942, allocations: 8.031 kB / 1.628 GB, free: 47.79 MB / 0.948 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01755/2.96, allocations: 1.948 MB / 1.63 GB, free: 45.95 MB / 0.948 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.01502/2.975, allocations: 4.742 MB / 1.634 GB, free: 42.57 MB / 0.948 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0005195/2.975, allocations: 407.2 kB / 1.635 GB, free: 42.34 MB / 0.948 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.001998/2.977, allocations: 0.528 MB / 1.635 GB, free: 41.98 MB / 0.948 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.02079/2.998, allocations: 5.736 MB / 1.641 GB, free: 38.2 MB / 0.948 GB
Notification: Performance of preOpt findStateOrder (simulation): time 0.0002531/2.999, allocations: 0 / 1.641 GB, free: 38.2 MB / 0.948 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.001715/3, allocations: 211.3 kB / 1.641 GB, free: 38.15 MB / 0.948 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0004121/3.001, allocations: 262.1 kB / 1.641 GB, free: 37.91 MB / 0.948 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.02131/3.022, allocations: 6.083 MB / 1.647 GB, free: 33.95 MB / 0.948 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 0.04834/3.07, allocations: 23.65 MB / 1.67 GB, free: 8.832 MB / 0.948 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.01075/3.081, allocations: 5.08 MB / 1.675 GB, free: 3.66 MB / 0.948 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.006446/3.088, allocations: 2.444 MB / 1.678 GB, free: 1.211 MB / 0.948 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.0008193/3.089, allocations: 265.9 kB / 1.678 GB, free: 0.9297 MB / 0.948 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 8.45e-05/3.089, allocations: 81.62 kB / 1.678 GB, free: 0.8398 MB / 0.948 GB
Notification: Performance of pre-optimization done (n=397): time 6.613e-06/3.089, allocations: 4 kB / 1.678 GB, free: 0.8359 MB / 0.948 GB
Notification: Performance of matching and sorting (n=405): time 0.05174/3.141, allocations: 13.02 MB / 1.691 GB, free: 3.562 MB / 0.9636 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 9.003e-05/3.141, allocations: 90.59 kB / 1.691 GB, free: 3.461 MB / 0.9636 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.009768/3.15, allocations: 3.989 MB / 1.695 GB, free: 15.49 MB / 0.9792 GB
Notification: Performance of collectPreVariables (initialization): time 0.001031/3.151, allocations: 125.4 kB / 1.695 GB, free: 15.36 MB / 0.9792 GB
Notification: Performance of collectInitialEqns (initialization): time 0.003601/3.155, allocations: 2.685 MB / 1.697 GB, free: 12.66 MB / 0.9792 GB
Notification: Performance of collectInitialBindings (initialization): time 0.002717/3.158, allocations: 1.398 MB / 1.699 GB, free: 11.27 MB / 0.9792 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0004609/3.158, allocations: 79.52 kB / 1.699 GB, free: 11.2 MB / 0.9792 GB
Notification: Performance of setup shared object (initialization): time 0.0004399/3.159, allocations: 458.4 kB / 1.699 GB, free: 10.75 MB / 0.9792 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.006249/3.165, allocations: 1.803 MB / 1.701 GB, free: 8.941 MB / 0.9792 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.007714/3.173, allocations: 2.598 MB / 1.703 GB, free: 6.086 MB / 0.9792 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.007399/3.18, allocations: 2.106 MB / 1.706 GB, free: 3.977 MB / 0.9792 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.854e-05/3.18, allocations: 10.36 kB / 1.706 GB, free: 3.969 MB / 0.9792 GB
Notification: Performance of matching and sorting (n=501) (initialization): time 0.02234/3.203, allocations: 5.516 MB / 1.711 GB, free: 14.41 MB / 0.9948 GB
Notification: Performance of prepare postOptimizeDAE: time 0.0003139/3.203, allocations: 342 kB / 1.711 GB, free: 13.97 MB / 0.9948 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.082e-05/3.203, allocations: 8 kB / 1.711 GB, free: 13.96 MB / 0.9948 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.004632/3.208, allocations: 0.6027 MB / 1.712 GB, free: 13.32 MB / 0.9948 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.007859/3.216, allocations: 0.7646 MB / 1.713 GB, free: 12.56 MB / 0.9948 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01283/3.229, allocations: 11.77 MB / 1.724 GB, free: 16 kB / 0.9948 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.01197/3.241, allocations: 0.5392 MB / 1.725 GB, free: 15.48 MB / 1.01 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.001074/3.242, allocations: 132 kB / 1.725 GB, free: 15.35 MB / 1.01 GB
Notification: Performance of prepare postOptimizeDAE: time 1.467e-05/3.242, allocations: 4 kB / 1.725 GB, free: 15.35 MB / 1.01 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.01755/3.259, allocations: 4.824 MB / 1.729 GB, free: 10.48 MB / 1.01 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.001e-05/3.259, allocations: 8 kB / 1.729 GB, free: 10.48 MB / 1.01 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.002163/3.262, allocations: 438.3 kB / 1.73 GB, free: 10.01 MB / 1.01 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.007295/3.269, allocations: 0.7333 MB / 1.731 GB, free: 9.277 MB / 1.01 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.02072/3.29, allocations: 17.78 MB / 1.748 GB, free: 5.922 MB / 1.026 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.01146/3.301, allocations: 0.5339 MB / 1.749 GB, free: 5.391 MB / 1.026 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0009846/3.302, allocations: 131.9 kB / 1.749 GB, free: 5.262 MB / 1.026 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 32
 * Number of states: 0 ()
 * Number of discrete variables: 0 ()
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (457):
 * Single equations (assignments): 435
 * Array equations: 8
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 2
 * Torn equation systems: 12
 * Mixed (continuous/discrete) equation systems: 0
Notification: Equation system details:
 * Constant Jacobian: 0
 * Linear Jacobian (size,density): 0
 * Non-linear Jacobian: 2 {1,1}
 * Without analytic Jacobian: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 4 {(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3}
 * Non-linear torn systems: 8 {1 3,1 3,1 3,1 3,1 3,1 3,1 3,1 3}
Notification: Performance of prepare postOptimizeDAE: time 0.007247/3.309, allocations: 1.421 MB / 1.75 GB, free: 3.832 MB / 1.026 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.002776/3.312, allocations: 0.5519 MB / 1.751 GB, free: 3.273 MB / 1.026 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01787/3.33, allocations: 5.109 MB / 1.756 GB, free: 14.1 MB / 1.042 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.084e-05/3.33, allocations: 40 kB / 1.756 GB, free: 14.06 MB / 1.042 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 1.357e-05/3.33, allocations: 0 / 1.756 GB, free: 14.06 MB / 1.042 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.01496/3.345, allocations: 4.243 MB / 1.76 GB, free: 9.762 MB / 1.042 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.03617/3.382, allocations: 11.93 MB / 1.771 GB, free: 13.68 MB / 1.057 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.785e-05/3.382, allocations: 4.219 kB / 1.771 GB, free: 13.68 MB / 1.057 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.008596/3.39, allocations: 0.8232 MB / 1.772 GB, free: 12.85 MB / 1.057 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.00199/3.392, allocations: 441.2 kB / 1.773 GB, free: 12.39 MB / 1.057 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0007888/3.393, allocations: 95.91 kB / 1.773 GB, free: 12.29 MB / 1.057 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.01152/3.405, allocations: 11.73 MB / 1.784 GB, free: 15.78 MB / 1.073 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 8.096e-06/3.405, allocations: 4 kB / 1.784 GB, free: 15.78 MB / 1.073 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.02428/3.429, allocations: 7.818 MB / 1.792 GB, free: 7.855 MB / 1.073 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.005138/3.434, allocations: 1.088 MB / 1.793 GB, free: 6.742 MB / 1.073 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.002053/3.436, allocations: 86.5 kB / 1.793 GB, free: 6.66 MB / 1.073 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.009403/3.446, allocations: 435.3 kB / 1.793 GB, free: 6.234 MB / 1.073 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0009685/3.447, allocations: 262.6 kB / 1.794 GB, free: 5.977 MB / 1.073 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0005322/3.447, allocations: 131.9 kB / 1.794 GB, free: 5.848 MB / 1.073 GB
Notification: Performance of sorting global known variables: time 0.006694/3.454, allocations: 2.659 MB / 1.796 GB, free: 3.207 MB / 1.073 GB
Notification: Performance of sort global known variables: time 6.81e-07/3.454, allocations: 0 / 1.796 GB, free: 3.207 MB / 1.073 GB
Notification: Performance of remove unused functions: time 0.01444/3.468, allocations: 2.971 MB / 1.799 GB, free: 244 kB / 1.073 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 8
 * Number of states: 26 (hea1.vol.dynBal.U,hea1.vol.dynBal.mXi[1],hea2.vol.dynBal.U,hea2.vol.dynBal.m,hea2.vol.dynBal.mXi[1],hea3.vol.dynBal.U,hea3.vol.dynBal.mXi[1],hea4.vol.dynBal.U,hea4.vol.dynBal.m,hea4.vol.dynBal.mXi[1],mix1.dynBal.U,mix1.dynBal.m,mix1.dynBal.mXi[1],hea5.vol.dynBal.U,hea5.vol.dynBal.mXi[1],hea6.vol.dynBal.U,hea6.vol.dynBal.m,hea6.vol.dynBal.mXi[1],hea7.vol.dynBal.U,hea7.vol.dynBal.mXi[1],hea8.vol.dynBal.U,hea8.vol.dynBal.m,hea8.vol.dynBal.mXi[1],mix2.dynBal.U,mix2.dynBal.m,mix2.dynBal.mXi[1])
 * Number of discrete variables: 0 ()
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for simulation (369):
 * Single equations (assignments): 355
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 2
 * Torn equation systems: 12
 * Mixed (continuous/discrete) equation systems: 0
Notification: Equation system details:
 * Constant Jacobian: 0
 * Linear Jacobian (size,density): 0
 * Non-linear Jacobian: 2 {1,1}
 * Without analytic Jacobian: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 4 {(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3,(1,100.0%) 3}
 * Non-linear torn systems: 8 {1 3,1 3,1 3,1 3,1 3,1 3,1 3,1 3}
Notification: Performance of Backend phase and start with SimCode phase: time 0.001986/3.47, allocations: 0.6174 MB / 1.8 GB, free: 15.66 MB / 1.089 GB
Notification: Performance of simCode: created initialization part: time 0.02528/3.496, allocations: 9.077 MB / 1.809 GB, free: 6.387 MB / 1.089 GB
Notification: Performance of simCode: created event and clocks part: time 1.148e-05/3.496, allocations: 0 / 1.809 GB, free: 6.387 MB / 1.089 GB
Notification: Performance of simCode: created simulation system equations: time 0.008311/3.504, allocations: 2.896 MB / 1.812 GB, free: 3.449 MB / 1.089 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.03521/3.539, allocations: 3.502 MB / 1.815 GB, free: 15.97 MB / 1.104 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.03717/3.577, allocations: 14.75 MB / 1.829 GB, free: 1.203 MB / 1.104 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.007078/3.584, allocations: 3.524 MB / 1.833 GB, free: 13.65 MB / 1.12 GB
Notification: Performance of simCode: alias equations: time 0.01358/3.597, allocations: 1.779 MB / 1.835 GB, free: 11.86 MB / 1.12 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.002913/3.6, allocations: 407.4 kB / 1.835 GB, free: 11.46 MB / 1.12 GB
Notification: Performance of SimCode: time 1.242e-06/3.6, allocations: 3.938 kB / 1.835 GB, free: 11.46 MB / 1.12 GB
Notification: Performance of Templates: time 0.9582/4.559, allocations: 116.5 MB / 1.949 GB, free: 435.6 MB / 1.12 GB
make -j1 -f Buildings_8.0.0_Buildings.Fluid.Interfaces.Examples.Humidifier_u.makefile
(rm -f Buildings_8.0.0_Buildings.Fluid.Interfaces.Examples.Humidifier_u.pipe ; mkfifo Buildings_8.0.0_Buildings.Fluid.Interfaces.Examples.Humidifier_u.pipe ; head -c 1048576 < Buildings_8.0.0_Buildings.Fluid.Interfaces.Examples.Humidifier_u.pipe >> ../files/Buildings_8.0.0_Buildings.Fluid.Interfaces.Examples.Humidifier_u.sim & ./Buildings_8.0.0_Buildings.Fluid.Interfaces.Examples.Humidifier_u -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8.0.0_Buildings.Fluid.Interfaces.Examples.Humidifier_u.pipe 2>&1)