Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr AixLib_AixLib.Media.Examples.AirProperties.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/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/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_DeviceDrivers 2.1.1/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/SDF master/package.mo", uses=false) Using package SDF with version 0.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/SDF master/package.mo) Using package Modelica_DeviceDrivers with version 2.1.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_DeviceDrivers 2.1.1/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) 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 AixLib with version 1.3.2 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/package.mo) Running command: translateModel(AixLib.Media.Examples.AirProperties,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="AixLib_AixLib.Media.Examples.AirProperties") translateModel(AixLib.Media.Examples.AirProperties,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="AixLib_AixLib.Media.Examples.AirProperties") [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/Obsolete/YearIndependent/FastHVAC/Components/HeatExchangers/RadiatorMultiLayer.mo:265:34-265:6228:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/Obsolete/YearIndependent/FastHVAC/Components/HeatExchangers/RadiatorMultiLayer.mo:265:34-265:6853:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/Obsolete/YearIndependent/FastHVAC/Components/HeatExchangers/RadiatorMultiLayer.mo:265:34-265:8435:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/Obsolete/YearIndependent/FastHVAC/Components/HeatExchangers/RadiatorMultiLayer.mo:265:34-265:9369:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/Obsolete/YearIndependent/FastHVAC/Components/HeatExchangers/RadiatorMultiLayer.mo:265:34-265:11505:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/Obsolete/YearIndependent/FastHVAC/Components/HeatExchangers/RadiatorMultiLayer.mo:265:34-265:12875:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/ThermalZones/HighOrder/Components/Examples/DryAir/DryAir_test.mo:71:18-71:405:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/ThermalZones/HighOrder/Components/DryAir/InfiltrationRate_DIN12831.mo:20:192-20:2066:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/ThermalZones/HighOrder/Components/DryAir/InfiltrationRate_DIN12831.mo:20:192-20:4252:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/DataBase/Weather/SurfaceOrientation/SurfaceOrientationData_N_E_S_W_RoofN_Roof_S.mo:5:35-5:362:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/DataBase/Weather/SurfaceOrientation/SurfaceOrientationData_N_E_S_W_Hor.mo:5:35-5:320:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/DataBase/Weather/SurfaceOrientation/SurfaceOrientationData_NE_SE_SW_NW_Hor.mo:5:35-5:324:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/DataBase/CHP/CHPDataSimple/CHP_XRGI_9kWel.mo:25:34-25:588:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/DataBase/CHP/CHPDataSimple/CHP_XRGI_9kWel.mo:25:34-25:3852:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/DataBase/CHP/CHPDataSimple/CHP_Cleanergy_C9G.mo:36:34-36:594:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/BoundaryConditions/InternalGains/Examples/InternalGains/Machines.mo:31:20-31:400:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. [/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/BoundaryConditions/InternalGains/Examples/InternalGains/Lights.mo:27:20-27:398:writable] Warning: Lexer treating \ as \\, since \ is not a valid Modelica escape sequence. Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/AixLib 1.3.2/package.mo): time 1.692/1.692, allocations: 266.7 MB / 281.7 MB, free: 5.598 MB / 234.8 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.00136/0.00136, allocations: 180.2 kB / 339.4 MB, free: 2.82 MB / 266.8 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.431/1.431, allocations: 223.2 MB / 0.6056 GB, free: 1.926 MB / 474.8 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001269/0.00127, allocations: 97.62 kB / 0.7111 GB, free: 6.328 MB / 490.8 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_DeviceDrivers 2.1.1/package.mo): time 0.4557/0.4557, allocations: 12.01 MB / 0.8282 GB, free: 67.52 MB / 0.5887 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/SDF master/package.mo:9:42-9:258:writable] Notification: This is an open source dummy package of a commercial library. If you want it to be supported, you will need to add an implemention on our github repository: https://github.com/Modelica-OpenVendorSpecificLibraries. Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/SDF master/package.mo): time 0.0004199/0.0004198, allocations: 17.61 kB / 0.9365 GB, free: 13.96 MB / 0.5887 GB Notification: AixLib requested package SDF of version 0.4.2. SDF 0.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.0006342/0.0006344, allocations: 24 kB / 1.057 GB, free: 2.52 MB / 0.698 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.7425/0.7432, allocations: 110.2 MB / 1.165 GB, free: 160.2 MB / 0.7449 GB Notification: Performance of FrontEnd - scodeFlatten: time 4.748/5.491, allocations: 1.908 GB / 3.073 GB, free: 130.1 MB / 0.948 GB Notification: Performance of FrontEnd - mkProgramGraph: time 0.0002421/5.491, allocations: 71.72 kB / 3.073 GB, free: 130.1 MB / 0.948 GB Notification: Performance of FrontEnd - DAE generated: time 0.09211/5.583, allocations: 48.15 MB / 3.12 GB, free: 89.84 MB / 0.948 GB Notification: Performance of FrontEnd: time 2.464e-06/5.583, allocations: 0 / 3.12 GB, free: 89.84 MB / 0.948 GB Notification: Performance of Transformations before backend: time 1.044e-05/5.584, allocations: 4 kB / 3.12 GB, free: 89.84 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: 52 * Number of variables: 52 Notification: Performance of Generate backend data structure: time 0.001119/5.585, allocations: 0.5552 MB / 3.12 GB, free: 89.25 MB / 0.948 GB Notification: Performance of prepare preOptimizeDAE: time 4.383e-05/5.585, allocations: 8.031 kB / 3.12 GB, free: 89.24 MB / 0.948 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001156/5.586, allocations: 137.4 kB / 3.12 GB, free: 89.12 MB / 0.948 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0002949/5.586, allocations: 220.1 kB / 3.121 GB, free: 88.87 MB / 0.948 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.017e-05/5.586, allocations: 12.56 kB / 3.121 GB, free: 88.86 MB / 0.948 GB Notification: Performance of preOpt expandDerOperator (simulation): time 3.381e-05/5.586, allocations: 22.7 kB / 3.121 GB, free: 88.85 MB / 0.948 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0005862/5.587, allocations: 332 kB / 3.121 GB, free: 88.58 MB / 0.948 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.397e-05/5.587, allocations: 0 / 3.121 GB, free: 88.58 MB / 0.948 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 3.49e-05/5.587, allocations: 14.06 kB / 3.121 GB, free: 88.57 MB / 0.948 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.382e-05/5.587, allocations: 21.09 kB / 3.121 GB, free: 88.55 MB / 0.948 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0004898/5.587, allocations: 315 kB / 3.121 GB, free: 88.32 MB / 0.948 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.001508/5.589, allocations: 1.164 MB / 3.122 GB, free: 87.15 MB / 0.948 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0004609/5.589, allocations: 185.1 kB / 3.123 GB, free: 86.99 MB / 0.948 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0004245/5.59, allocations: 457 kB / 3.123 GB, free: 86.46 MB / 0.948 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.852e-05/5.59, allocations: 37.12 kB / 3.123 GB, free: 86.41 MB / 0.948 GB Notification: Performance of pre-optimization done (n=21): time 1.723e-06/5.59, allocations: 0 / 3.123 GB, free: 86.41 MB / 0.948 GB Notification: Performance of matching and sorting (n=21): time 0.0006696/5.591, allocations: 342.1 kB / 3.123 GB, free: 86.1 MB / 0.948 GB Notification: Performance of inlineWhenForInitialization (initialization): time 2.879e-05/5.591, allocations: 55.41 kB / 3.123 GB, free: 86.04 MB / 0.948 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001847/5.591, allocations: 197.3 kB / 3.124 GB, free: 85.86 MB / 0.948 GB Notification: Performance of collectPreVariables (initialization): time 3.012e-05/5.591, allocations: 36.45 kB / 3.124 GB, free: 85.82 MB / 0.948 GB Notification: Performance of collectInitialEqns (initialization): time 6.687e-05/5.591, allocations: 146.5 kB / 3.124 GB, free: 85.68 MB / 0.948 GB Notification: Performance of collectInitialBindings (initialization): time 4.538e-05/5.591, allocations: 69.42 kB / 3.124 GB, free: 85.62 MB / 0.948 GB Notification: Performance of simplifyInitialFunctions (initialization): time 1.289e-05/5.591, allocations: 3 kB / 3.124 GB, free: 85.62 MB / 0.948 GB Notification: Performance of setup shared object (initialization): time 7.208e-05/5.591, allocations: 330.4 kB / 3.124 GB, free: 85.3 MB / 0.948 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001022/5.591, allocations: 73.84 kB / 3.124 GB, free: 85.24 MB / 0.948 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0001282/5.591, allocations: 153.5 kB / 3.124 GB, free: 85.07 MB / 0.948 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0001459/5.591, allocations: 97.02 kB / 3.124 GB, free: 85 MB / 0.948 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.555e-06/5.591, allocations: 0 / 3.124 GB, free: 85 MB / 0.948 GB Notification: Performance of matching and sorting (n=34) (initialization): time 0.0004559/5.592, allocations: 278.3 kB / 3.125 GB, free: 84.77 MB / 0.948 GB Notification: Performance of prepare postOptimizeDAE: time 1.835e-05/5.592, allocations: 12.03 kB / 3.125 GB, free: 84.75 MB / 0.948 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.846e-06/5.592, allocations: 4 kB / 3.125 GB, free: 84.75 MB / 0.948 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.099e-05/5.592, allocations: 7.953 kB / 3.125 GB, free: 84.74 MB / 0.948 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002512/5.592, allocations: 61.97 kB / 3.125 GB, free: 84.68 MB / 0.948 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.177e-06/5.592, allocations: 4 kB / 3.125 GB, free: 84.68 MB / 0.948 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002207/5.593, allocations: 35.62 kB / 3.125 GB, free: 84.65 MB / 0.948 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.455e-05/5.593, allocations: 10.56 kB / 3.125 GB, free: 84.64 MB / 0.948 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 13 * 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 (31): * Single equations (assignments): 30 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 1 * 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 0.0001232/5.593, allocations: 140.6 kB / 3.125 GB, free: 84.5 MB / 0.948 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001181/5.593, allocations: 29.73 kB / 3.125 GB, free: 84.48 MB / 0.948 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0004159/5.593, allocations: 247.9 kB / 3.125 GB, free: 84.29 MB / 0.948 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.773e-06/5.593, allocations: 11.89 kB / 3.125 GB, free: 84.28 MB / 0.948 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.139e-06/5.593, allocations: 0 / 3.125 GB, free: 84.28 MB / 0.948 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.598e-06/5.593, allocations: 3.984 kB / 3.125 GB, free: 84.28 MB / 0.948 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0005764/5.594, allocations: 0.5426 MB / 3.126 GB, free: 83.74 MB / 0.948 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.204e-06/5.594, allocations: 7.969 kB / 3.126 GB, free: 83.73 MB / 0.948 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001708/5.594, allocations: 27.98 kB / 3.126 GB, free: 83.71 MB / 0.948 GB Notification: Performance of postOpt tearingSystem (simulation): time 4.359e-06/5.594, allocations: 4 kB / 3.126 GB, free: 83.7 MB / 0.948 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.57e-05/5.594, allocations: 2.375 kB / 3.126 GB, free: 83.7 MB / 0.948 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 3.617e-06/5.594, allocations: 4 kB / 3.126 GB, free: 83.7 MB / 0.948 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.853e-06/5.594, allocations: 3.938 kB / 3.126 GB, free: 83.7 MB / 0.948 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0004217/5.595, allocations: 343.5 kB / 3.126 GB, free: 83.37 MB / 0.948 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0001225/5.595, allocations: 125.9 kB / 3.126 GB, free: 83.23 MB / 0.948 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 5.543e-05/5.595, allocations: 2.438 kB / 3.126 GB, free: 83.23 MB / 0.948 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0002458/5.595, allocations: 22.44 kB / 3.126 GB, free: 83.21 MB / 0.948 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 3.068e-05/5.595, allocations: 11.98 kB / 3.126 GB, free: 83.2 MB / 0.948 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.801e-05/5.595, allocations: 10.5 kB / 3.126 GB, free: 83.19 MB / 0.948 GB Notification: Performance of sorting global known variables: time 0.0001017/5.595, allocations: 152.8 kB / 3.126 GB, free: 83.06 MB / 0.948 GB Notification: Performance of sort global known variables: time 1.2e-07/5.595, allocations: 0 / 3.126 GB, free: 83.06 MB / 0.948 GB Notification: Performance of remove unused functions: time 0.0006858/5.596, allocations: 154.4 kB / 3.127 GB, free: 82.94 MB / 0.948 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * 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 simulation (18): * Single equations (assignments): 17 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 1 * 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 Backend phase and start with SimCode phase: time 0.001002/5.597, allocations: 0.6552 MB / 3.127 GB, free: 82.3 MB / 0.948 GB Notification: Performance of simCode: created initialization part: time 0.000329/5.597, allocations: 194 kB / 3.127 GB, free: 82.14 MB / 0.948 GB Notification: Performance of simCode: created event and clocks part: time 4.137e-06/5.597, allocations: 0 / 3.127 GB, free: 82.14 MB / 0.948 GB Notification: Performance of simCode: created simulation system equations: time 0.0001097/5.597, allocations: 94.84 kB / 3.128 GB, free: 82.07 MB / 0.948 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0004988/5.598, allocations: 90.92 kB / 3.128 GB, free: 82 MB / 0.948 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0007394/5.599, allocations: 0.5292 MB / 3.128 GB, free: 81.46 MB / 0.948 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0002071/5.599, allocations: 0.7367 MB / 3.129 GB, free: 80.7 MB / 0.948 GB Notification: Performance of simCode: alias equations: time 0.0003023/5.599, allocations: 62.23 kB / 3.129 GB, free: 80.64 MB / 0.948 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 7.031e-05/5.599, allocations: 23.44 kB / 3.129 GB, free: 80.61 MB / 0.948 GB Notification: Performance of SimCode: time 4.61e-07/5.599, allocations: 0 / 3.129 GB, free: 80.61 MB / 0.948 GB Notification: Performance of Templates: time 0.0157/5.615, allocations: 12.07 MB / 3.141 GB, free: 68.63 MB / 0.948 GB make -j1 -f AixLib_AixLib.Media.Examples.AirProperties.makefile (rm -f AixLib_AixLib.Media.Examples.AirProperties.pipe ; mkfifo AixLib_AixLib.Media.Examples.AirProperties.pipe ; head -c 1048576 < AixLib_AixLib.Media.Examples.AirProperties.pipe >> ../files/AixLib_AixLib.Media.Examples.AirProperties.sim & ./AixLib_AixLib.Media.Examples.AirProperties -abortSlowSimulation -alarm=480 -lv LOG_STATS > AixLib_AixLib.Media.Examples.AirProperties.pipe 2>&1)