Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACConverter.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 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo", uses=false) Using package Buildings with version 8.1.4 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/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 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: "" <> buildModelFMU(Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACConverter,fileNamePrefix="Buildings_8_Buildings_Electrical_AC_ThreePhasesBalanced_Conversion_Examples_ACACConverter",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACConverter,fileNamePrefix="Buildings_8_Buildings_Electrical_AC_ThreePhasesBalanced_Conversion_Examples_ACACConverter",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001096/0.001096, allocations: 108 kB / 15.61 MB, free: 152 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001074/0.001074, allocations: 194.2 kB / 16.53 MB, free: 6.664 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.327/1.327, allocations: 205.1 MB / 222.4 MB, free: 4.617 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.643/1.643, allocations: 292.3 MB / 0.5489 GB, free: 12.85 MB / 462.1 MB Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.001358/0.001358, allocations: 65.39 kB / 0.6716 GB, free: 26.21 MB / 0.5294 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1973/0.1987, allocations: 114.6 MB / 0.7835 GB, free: 13.39 MB / 0.6075 GB Notification: Performance of NFInst.instantiate(Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACConverter): time 0.004086/0.2028, allocations: 2.814 MB / 0.7862 GB, free: 10.55 MB / 0.6075 GB Notification: Performance of NFInst.instExpressions: time 0.002959/0.2058, allocations: 2.035 MB / 0.7882 GB, free: 8.504 MB / 0.6075 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0001116/0.206, allocations: 4 kB / 0.7882 GB, free: 8.5 MB / 0.6075 GB Notification: Performance of NFTyping.typeComponents: time 0.000713/0.2067, allocations: 227.1 kB / 0.7884 GB, free: 8.277 MB / 0.6075 GB Notification: Performance of NFTyping.typeBindings: time 0.0003703/0.2071, allocations: 195.2 kB / 0.7886 GB, free: 8.086 MB / 0.6075 GB Notification: Performance of NFTyping.typeClassSections: time 0.000613/0.2077, allocations: 283.1 kB / 0.7889 GB, free: 7.809 MB / 0.6075 GB Notification: Performance of NFFlatten.flatten: time 0.0003299/0.2081, allocations: 311 kB / 0.7892 GB, free: 7.504 MB / 0.6075 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0002969/0.2084, allocations: 166.2 kB / 0.7894 GB, free: 7.344 MB / 0.6075 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0001576/0.2085, allocations: 119.6 kB / 0.7895 GB, free: 7.227 MB / 0.6075 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0002405/0.2088, allocations: 151.5 kB / 0.7896 GB, free: 7.078 MB / 0.6075 GB Notification: Performance of NFPackage.collectConstants: time 3.552e-05/0.2088, allocations: 20 kB / 0.7896 GB, free: 7.059 MB / 0.6075 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0005262/0.2094, allocations: 387.2 kB / 0.79 GB, free: 6.68 MB / 0.6075 GB Notification: Performance of NFScalarize.scalarize: time 9.833e-05/0.2095, allocations: 95.78 kB / 0.7901 GB, free: 6.586 MB / 0.6075 GB Notification: Performance of NFVerifyModel.verify: time 0.0001073/0.2096, allocations: 115.4 kB / 0.7902 GB, free: 6.473 MB / 0.6075 GB Notification: Performance of NFConvertDAE.convert: time 0.0004868/0.2101, allocations: 458.8 kB / 0.7906 GB, free: 6.023 MB / 0.6075 GB Notification: Performance of FrontEnd - DAE generated: time 3.125e-06/0.2101, allocations: 0 / 0.7906 GB, free: 6.023 MB / 0.6075 GB Notification: Performance of FrontEnd: time 1.383e-06/0.2101, allocations: 0 / 0.7906 GB, free: 6.023 MB / 0.6075 GB Notification: Performance of Transformations before backend: time 5.551e-06/0.2101, allocations: 0 / 0.7906 GB, free: 6.023 MB / 0.6075 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 54 * Number of variables: 54 Notification: Performance of Generate backend data structure: time 0.000839/0.2109, allocations: 0.5575 MB / 0.7912 GB, free: 5.414 MB / 0.6075 GB Notification: Performance of prepare preOptimizeDAE: time 3.475e-05/0.211, allocations: 8.031 kB / 0.7912 GB, free: 5.406 MB / 0.6075 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 5.451e-05/0.211, allocations: 62.72 kB / 0.7913 GB, free: 5.336 MB / 0.6075 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0007156/0.2118, allocations: 108.5 kB / 0.7914 GB, free: 5.23 MB / 0.6075 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0002618/0.212, allocations: 248.5 kB / 0.7916 GB, free: 4.949 MB / 0.6075 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 1.692e-05/0.2121, allocations: 16.8 kB / 0.7916 GB, free: 4.934 MB / 0.6075 GB Notification: Performance of preOpt expandDerOperator (simulation): time 4.818e-05/0.2121, allocations: 19.94 kB / 0.7916 GB, free: 4.914 MB / 0.6075 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0006019/0.2127, allocations: 385.9 kB / 0.792 GB, free: 4.512 MB / 0.6075 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.756e-05/0.2128, allocations: 7.984 kB / 0.792 GB, free: 4.504 MB / 0.6075 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.859e-05/0.2128, allocations: 4 kB / 0.792 GB, free: 4.5 MB / 0.6075 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 4.069e-05/0.2128, allocations: 27.77 kB / 0.792 GB, free: 4.473 MB / 0.6075 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0006174/0.2135, allocations: 363.6 kB / 0.7924 GB, free: 4.117 MB / 0.6075 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.001862/0.2153, allocations: 1.726 MB / 0.7941 GB, free: 2.246 MB / 0.6075 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0006768/0.216, allocations: 351.8 kB / 0.7944 GB, free: 1.887 MB / 0.6075 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.000309/0.2163, allocations: 185.6 kB / 0.7946 GB, free: 1.699 MB / 0.6075 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0001436/0.2165, allocations: 93.08 kB / 0.7947 GB, free: 1.59 MB / 0.6075 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.536e-05/0.2165, allocations: 38.56 kB / 0.7947 GB, free: 1.543 MB / 0.6075 GB Notification: Performance of pre-optimization done (n=25): time 3.016e-06/0.2165, allocations: 0 / 0.7947 GB, free: 1.543 MB / 0.6075 GB Notification: Performance of matching and sorting (n=35): time 0.007129/0.2237, allocations: 1.909 MB / 0.7966 GB, free: 15.62 MB / 0.6231 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.393e-05/0.2238, allocations: 81.11 kB / 0.7966 GB, free: 15.53 MB / 0.6231 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001642/0.2239, allocations: 181.3 kB / 0.7968 GB, free: 15.34 MB / 0.6231 GB Notification: Performance of collectPreVariables (initialization): time 3.813e-05/0.224, allocations: 33.7 kB / 0.7969 GB, free: 15.3 MB / 0.6231 GB Notification: Performance of collectInitialEqns (initialization): time 9.61e-05/0.2241, allocations: 152.3 kB / 0.797 GB, free: 15.15 MB / 0.6231 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001032/0.2242, allocations: 122.3 kB / 0.7971 GB, free: 15.03 MB / 0.6231 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001409/0.2243, allocations: 81.59 kB / 0.7972 GB, free: 14.94 MB / 0.6231 GB Notification: Performance of setup shared object (initialization): time 0.0001067/0.2245, allocations: 330.8 kB / 0.7975 GB, free: 14.61 MB / 0.6231 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0004539/0.2249, allocations: 252.7 kB / 0.7977 GB, free: 14.36 MB / 0.6231 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0005048/0.2254, allocations: 341.5 kB / 0.7981 GB, free: 13.99 MB / 0.6231 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.000968/0.2264, allocations: 0.5955 MB / 0.7987 GB, free: 13.37 MB / 0.6231 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.753e-06/0.2264, allocations: 4 kB / 0.7987 GB, free: 13.36 MB / 0.6231 GB Notification: Performance of matching and sorting (n=44) (initialization): time 0.001129/0.2276, allocations: 0.635 MB / 0.7993 GB, free: 12.72 MB / 0.6231 GB Notification: Performance of prepare postOptimizeDAE: time 1.82e-05/0.2276, allocations: 8 kB / 0.7993 GB, free: 12.71 MB / 0.6231 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.053e-05/0.2276, allocations: 12.25 kB / 0.7993 GB, free: 12.7 MB / 0.6231 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.637e-05/0.2276, allocations: 4 kB / 0.7993 GB, free: 12.7 MB / 0.6231 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008843/0.2285, allocations: 139.8 kB / 0.7994 GB, free: 12.56 MB / 0.6231 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.07e-05/0.2285, allocations: 11.88 kB / 0.7994 GB, free: 12.55 MB / 0.6231 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003876/0.2289, allocations: 55.92 kB / 0.7995 GB, free: 12.5 MB / 0.6231 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.78e-05/0.229, allocations: 19.98 kB / 0.7995 GB, free: 12.48 MB / 0.6231 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0005281/0.2295, allocations: 360 kB / 0.7999 GB, free: 12.12 MB / 0.6231 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0004626/0.23, allocations: 309.3 kB / 0.8002 GB, free: 11.79 MB / 0.6231 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0009107/0.2309, allocations: 0.5705 MB / 0.8007 GB, free: 11.18 MB / 0.6231 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.663e-06/0.2309, allocations: 4 kB / 0.8007 GB, free: 11.18 MB / 0.6231 GB Notification: Performance of matching and sorting (n=44) (initialization_lambda0): time 0.001081/0.232, allocations: 0.6182 MB / 0.8013 GB, free: 10.55 MB / 0.6231 GB Notification: Performance of prepare postOptimizeDAE: time 1.012e-05/0.232, allocations: 4 kB / 0.8013 GB, free: 10.55 MB / 0.6231 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.6e-06/0.232, allocations: 4 kB / 0.8013 GB, free: 10.55 MB / 0.6231 GB Notification: Performance of postOpt tearingSystem (initialization): time 6.322e-06/0.232, allocations: 4 kB / 0.8013 GB, free: 10.54 MB / 0.6231 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008298/0.2329, allocations: 147.7 kB / 0.8015 GB, free: 10.4 MB / 0.6231 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 6.662e-06/0.2329, allocations: 4 kB / 0.8015 GB, free: 10.39 MB / 0.6231 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003814/0.2333, allocations: 52.11 kB / 0.8015 GB, free: 10.34 MB / 0.6231 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.302e-05/0.2333, allocations: 16 kB / 0.8015 GB, free: 10.33 MB / 0.6231 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 10 * 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 (44): * Single equations (assignments): 44 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0001602/0.2335, allocations: 204.1 kB / 0.8017 GB, free: 10.12 MB / 0.6231 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 8.77e-05/0.2336, allocations: 23.81 kB / 0.8018 GB, free: 10.1 MB / 0.6231 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001339/0.2349, allocations: 0.6607 MB / 0.8024 GB, free: 9.43 MB / 0.6231 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 7.524e-06/0.2349, allocations: 4 kB / 0.8024 GB, free: 9.426 MB / 0.6231 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.382e-06/0.235, allocations: 0 / 0.8024 GB, free: 9.426 MB / 0.6231 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.813e-06/0.235, allocations: 4 kB / 0.8024 GB, free: 9.422 MB / 0.6231 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002134/0.2371, allocations: 1.375 MB / 0.8038 GB, free: 7.949 MB / 0.6231 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.617e-06/0.2371, allocations: 0 / 0.8038 GB, free: 7.949 MB / 0.6231 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005674/0.2377, allocations: 115.8 kB / 0.8039 GB, free: 7.836 MB / 0.6231 GB Notification: Performance of postOpt tearingSystem (simulation): time 8.045e-06/0.2377, allocations: 4 kB / 0.8039 GB, free: 7.832 MB / 0.6231 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.189e-05/0.2378, allocations: 15.94 kB / 0.8039 GB, free: 7.816 MB / 0.6231 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 7.795e-06/0.2378, allocations: 7.984 kB / 0.8039 GB, free: 7.809 MB / 0.6231 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.346e-06/0.2378, allocations: 4 kB / 0.8039 GB, free: 7.805 MB / 0.6231 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0009773/0.2388, allocations: 0.707 MB / 0.8046 GB, free: 7.059 MB / 0.6231 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0001432/0.2389, allocations: 144.7 kB / 0.8047 GB, free: 6.898 MB / 0.6231 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 5.201e-05/0.239, allocations: 11.94 kB / 0.8047 GB, free: 6.887 MB / 0.6231 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003212/0.2393, allocations: 39.95 kB / 0.8048 GB, free: 6.848 MB / 0.6231 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 9.471e-05/0.2394, allocations: 31.91 kB / 0.8048 GB, free: 6.816 MB / 0.6231 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.611e-05/0.2394, allocations: 11.98 kB / 0.8048 GB, free: 6.805 MB / 0.6231 GB Notification: Performance of sorting global known variables: time 0.000129/0.2396, allocations: 152.9 kB / 0.805 GB, free: 6.656 MB / 0.6231 GB Notification: Performance of sort global known variables: time 1.8e-07/0.2396, allocations: 3.938 kB / 0.805 GB, free: 6.652 MB / 0.6231 GB Notification: Performance of remove unused functions: time 0.0006631/0.2402, allocations: 144 kB / 0.8051 GB, free: 6.512 MB / 0.6231 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 9 * 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 (37): * Single equations (assignments): 37 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.001349/0.2416, allocations: 1.279 MB / 0.8064 GB, free: 5.18 MB / 0.6231 GB Notification: Performance of simCode: created initialization part: time 0.001733/0.2433, allocations: 0.8988 MB / 0.8072 GB, free: 4.281 MB / 0.6231 GB Notification: Performance of simCode: created event and clocks part: time 4.258e-06/0.2434, allocations: 0 / 0.8072 GB, free: 4.281 MB / 0.6231 GB Notification: Performance of simCode: created simulation system equations: time 0.0004505/0.2438, allocations: 251.7 kB / 0.8075 GB, free: 4.035 MB / 0.6231 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0005762/0.2444, allocations: 50.12 kB / 0.8075 GB, free: 3.992 MB / 0.6231 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.005062/0.2495, allocations: 3.789 MB / 0.8112 GB, free: 24 kB / 0.6231 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0003448/0.2499, allocations: 0.7877 MB / 0.812 GB, free: 15.21 MB / 0.6387 GB Notification: Performance of simCode: alias equations: time 0.0005492/0.2504, allocations: 174.8 kB / 0.8122 GB, free: 15.04 MB / 0.6387 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001959/0.2506, allocations: 79.39 kB / 0.8122 GB, free: 14.96 MB / 0.6387 GB Notification: Performance of SimCode: time 1.613e-06/0.2506, allocations: 4 kB / 0.8122 GB, free: 14.96 MB / 0.6387 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.5022/0.7528, allocations: 7.242 MB / 0.8193 GB, free: 7.867 MB / 0.6387 GB Notification: Performance of buildModelFMU: Generate platform static: time 7.96/8.713, allocations: 7.719 kB / 0.8193 GB, free: 7.859 MB / 0.6387 GB (rm -f Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACConverter.pipe ; mkfifo Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACConverter.pipe ; head -c 1048576 < Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACConverter.pipe >> ../files/Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACConverter.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator --tempDir=temp_Buildings_8_Buildings_Electrical_AC_ThreePhasesBalanced_Conversion_Examples_ACACConverter_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 Buildings_8_Buildings_Electrical_AC_ThreePhasesBalanced_Conversion_Examples_ACACConverter.fmu > Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Conversion.Examples.ACACConverter.pipe 2>&1)