Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr PhotoVoltaics_TGM_PhotoVoltaics_TGM.TGM_Comax_Analytical_20160808.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/PhotoVoltaics 2.0.0/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/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/PhotoVoltaics_TGM 2.0.0/package.mo", uses=false) Using package PhotoVoltaics_TGM with version 2.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/PhotoVoltaics_TGM 2.0.0/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 ModelicaServices with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo) Using package PhotoVoltaics with version 2.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/PhotoVoltaics 2.0.0/package.mo) Running command: "" <> buildModelFMU(PhotoVoltaics_TGM.TGM_Comax_Analytical_20160808,fileNamePrefix="PhotoVoltaics_TGM_PhotoVoltaics_TGM_TGM_Comax_Analytical_20160808",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(PhotoVoltaics_TGM.TGM_Comax_Analytical_20160808,fileNamePrefix="PhotoVoltaics_TGM_PhotoVoltaics_TGM_TGM_Comax_Analytical_20160808",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/PhotoVoltaics 2.0.0/package.mo): time 0.02825/0.02825, allocations: 5.394 MB / 20.89 MB, free: 1.398 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.007831/0.007831, allocations: 98.09 kB / 22.88 MB, free: 0.7383 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001196/0.001196, allocations: 195.6 kB / 25 MB, free: 144 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.233/1.233, allocations: 222.9 MB / 249.9 MB, free: 8.504 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/PhotoVoltaics_TGM 2.0.0/package.mo): time 0.008955/0.008955, allocations: 2.313 MB / 303.5 MB, free: 6.551 MB / 238.1 MB Warning: Ignoring unknown experiment annotation option: __Dymola_Algorithm = "Rkfix4" Notification: Performance of FrontEnd - loaded program: time 0.001808/0.001808, allocations: 95.86 kB / 367.3 MB, free: 6.773 MB / 302.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1923/0.1941, allocations: 51.2 MB / 418.5 MB, free: 26.4 MB / 302.1 MB Notification: Performance of NFInst.instantiate(PhotoVoltaics_TGM.TGM_Comax_Analytical_20160808): time 0.005908/0.2001, allocations: 6.772 MB / 425.2 MB, free: 19.6 MB / 302.1 MB Notification: Performance of NFInst.instExpressions: time 0.004124/0.2042, allocations: 3.127 MB / 428.4 MB, free: 16.46 MB / 302.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.0005159/0.2048, allocations: 19.94 kB / 428.4 MB, free: 16.44 MB / 302.1 MB Notification: Performance of NFTyping.typeComponents: time 0.002044/0.2068, allocations: 1.103 MB / 429.5 MB, free: 15.34 MB / 302.1 MB Notification: Performance of NFTyping.typeBindings: time 0.001398/0.2082, allocations: 0.8428 MB / 430.3 MB, free: 14.49 MB / 302.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.00121/0.2094, allocations: 0.5316 MB / 430.9 MB, free: 13.96 MB / 302.1 MB Notification: Performance of NFFlatten.flatten: time 0.0008045/0.2103, allocations: 1.383 MB / 432.3 MB, free: 12.57 MB / 302.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.001003/0.2113, allocations: 1.028 MB / 433.3 MB, free: 11.52 MB / 302.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0004029/0.2117, allocations: 0.5528 MB / 433.8 MB, free: 10.96 MB / 302.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0005705/0.2123, allocations: 0.7121 MB / 434.5 MB, free: 10.25 MB / 302.1 MB Notification: Performance of NFPackage.collectConstants: time 0.0001388/0.2124, allocations: 140 kB / 434.7 MB, free: 10.11 MB / 302.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.0005714/0.213, allocations: 443.6 kB / 435.1 MB, free: 9.68 MB / 302.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0001387/0.2131, allocations: 295 kB / 435.4 MB, free: 9.391 MB / 302.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0003541/0.2135, allocations: 0.6376 MB / 436 MB, free: 8.75 MB / 302.1 MB Notification: Performance of NFConvertDAE.convert: time 0.001125/0.2146, allocations: 1.713 MB / 437.8 MB, free: 7.031 MB / 302.1 MB Notification: Performance of FrontEnd - DAE generated: time 3.366e-06/0.2146, allocations: 3.938 kB / 437.8 MB, free: 7.027 MB / 302.1 MB Notification: Performance of FrontEnd: time 1.513e-06/0.2147, allocations: 0 / 437.8 MB, free: 7.027 MB / 302.1 MB Notification: Performance of Transformations before backend: time 1.336e-05/0.2147, allocations: 0 / 437.8 MB, free: 7.027 MB / 302.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 270 * Number of variables: 270 Notification: Performance of Generate backend data structure: time 0.003414/0.2181, allocations: 1.767 MB / 439.5 MB, free: 5.188 MB / 302.1 MB Notification: Performance of prepare preOptimizeDAE: time 3.477e-05/0.2181, allocations: 15.97 kB / 439.5 MB, free: 5.172 MB / 302.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001405/0.2183, allocations: 164.9 kB / 439.7 MB, free: 5 MB / 302.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001923/0.2202, allocations: 367.2 kB / 440.1 MB, free: 4.641 MB / 302.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001351/0.2216, allocations: 0.7521 MB / 440.8 MB, free: 3.844 MB / 302.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.29e-05/0.2216, allocations: 78.06 kB / 440.9 MB, free: 3.766 MB / 302.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001413/0.2218, allocations: 111.9 kB / 441 MB, free: 3.656 MB / 302.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001668/0.2235, allocations: 1.179 MB / 442.2 MB, free: 2.418 MB / 302.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 2.703e-05/0.2235, allocations: 3.938 kB / 442.2 MB, free: 2.414 MB / 302.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 9.239e-05/0.2236, allocations: 44 kB / 442.2 MB, free: 2.371 MB / 302.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.542e-05/0.2236, allocations: 24 kB / 442.2 MB, free: 2.348 MB / 302.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001791/0.2254, allocations: 1.038 MB / 443.3 MB, free: 1.309 MB / 302.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.005766/0.2312, allocations: 4.404 MB / 447.7 MB, free: 12.7 MB / 318.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.00288/0.2341, allocations: 1.772 MB / 449.5 MB, free: 10.72 MB / 318.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0007458/0.2348, allocations: 366.1 kB / 449.8 MB, free: 10.36 MB / 318.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.0001508/0.235, allocations: 170.8 kB / 450 MB, free: 10.16 MB / 318.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0009252/0.2359, allocations: 0.563 MB / 450.5 MB, free: 9.559 MB / 318.1 MB Notification: Performance of pre-optimization done (n=79): time 3.787e-06/0.236, allocations: 4 kB / 450.6 MB, free: 9.555 MB / 318.1 MB Notification: Performance of matching and sorting (n=79): time 0.005976/0.2419, allocations: 1.694 MB / 452.2 MB, free: 7.812 MB / 318.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001401/0.2421, allocations: 281.7 kB / 452.5 MB, free: 7.477 MB / 318.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0006708/0.2428, allocations: 0.5575 MB / 453.1 MB, free: 6.91 MB / 318.1 MB Notification: Performance of collectPreVariables (initialization): time 5.752e-05/0.2429, allocations: 49.64 kB / 453.1 MB, free: 6.855 MB / 318.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.0003135/0.2432, allocations: 490.7 kB / 453.6 MB, free: 6.367 MB / 318.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.0001877/0.2434, allocations: 252.4 kB / 453.9 MB, free: 6.117 MB / 318.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002985/0.2437, allocations: 210.7 kB / 454.1 MB, free: 5.902 MB / 318.1 MB Notification: Performance of setup shared object (initialization): time 0.0001509/0.2438, allocations: 382.8 kB / 454.4 MB, free: 5.52 MB / 318.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0007245/0.2446, allocations: 326.4 kB / 454.8 MB, free: 5.203 MB / 318.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0008699/0.2454, allocations: 0.5682 MB / 455.3 MB, free: 4.539 MB / 318.1 MB Notification: It was not possible to check the given initialization system for consistency symbolically, because the relevant equations are part of an algebraic loop. This is not supported yet. Notification: Performance of analyzeInitialSystem (initialization): time 0.01711/0.2626, allocations: 3.634 MB / 459 MB, free: 0.7383 MB / 318.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 8.025e-06/0.2626, allocations: 7.938 kB / 459 MB, free: 0.7305 MB / 318.1 MB Notification: Performance of matching and sorting (n=133) (initialization): time 0.002502/0.2651, allocations: 1.205 MB / 460.2 MB, free: 15.5 MB / 334.1 MB Notification: Performance of prepare postOptimizeDAE: time 5.725e-05/0.2652, allocations: 91.92 kB / 460.3 MB, free: 15.39 MB / 334.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.19e-05/0.2652, allocations: 7.984 kB / 460.3 MB, free: 15.38 MB / 334.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.0004571/0.2657, allocations: 89.05 kB / 460.4 MB, free: 15.29 MB / 334.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001086/0.2668, allocations: 259.5 kB / 460.6 MB, free: 15.04 MB / 334.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00148/0.2682, allocations: 1.582 MB / 462.2 MB, free: 13.31 MB / 334.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0008506/0.2691, allocations: 119.1 kB / 462.3 MB, free: 13.2 MB / 334.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.957e-05/0.2692, allocations: 55.95 kB / 462.4 MB, free: 13.14 MB / 334.1 MB Warning: The initial conditions are over specified. The following 1 initial equations are redundant, so they are removed from the initialization system: $PRE.irradiance.daysOfYear = PhotoVoltaics.Functions.dayOfTheYear(31, 12, irradiance.startYear). Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 32 * Number of states: 0 () * Number of discrete variables: 27 (writeCSV.firstTrigger,$PRE.writeCSV.firstTrigger,irradiance.year,$PRE.irradiance.year,mpTracker.signv,$PRE.mpTracker.signv,mpTracker.firstTrigger,$PRE.mpTracker.firstTrigger,mpTracker.counter,$PRE.mpTracker.counter,writeCSV.sampleTrigger,$whenCondition4,mpTracker.sampleTrigger,$whenCondition1,irradiance.localDays,irradiance.daysOfYear,$PRE.irradiance.daysOfYear,irradiance.dayOfYear,$PRE.irradiance.dayOfYear,irradiance.startDayOfYear,$PRE.irradiance.startDayOfYear,mpTracker.vRef,$PRE.mpTracker.vRef,$whenCondition3,$whenCondition2,integrator.local_reset,converter.integrator.local_reset) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (129): * Single equations (assignments): 125 * Array equations: 0 * Algorithm blocks: 3 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 1 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 1 system {2} * Without analytic Jacobian (size): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.0005085/0.2697, allocations: 367.9 kB / 462.7 MB, free: 12.75 MB / 334.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001511/0.2699, allocations: 83 kB / 462.8 MB, free: 12.67 MB / 334.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002588/0.2725, allocations: 1.257 MB / 464.1 MB, free: 11.38 MB / 334.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 7.494e-06/0.2725, allocations: 8 kB / 464.1 MB, free: 11.37 MB / 334.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.344e-06/0.2725, allocations: 0 / 464.1 MB, free: 11.37 MB / 334.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.005e-05/0.2725, allocations: 3.984 kB / 464.1 MB, free: 11.37 MB / 334.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.006258/0.2788, allocations: 2.559 MB / 466.6 MB, free: 8.723 MB / 334.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.098e-06/0.2788, allocations: 0 / 466.6 MB, free: 8.723 MB / 334.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.000551/0.2794, allocations: 135.8 kB / 466.8 MB, free: 8.59 MB / 334.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 0.0007488/0.2801, allocations: 334.2 kB / 467.1 MB, free: 8.254 MB / 334.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.259e-05/0.2802, allocations: 31.97 kB / 467.1 MB, free: 8.223 MB / 334.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001253/0.2814, allocations: 0.8896 MB / 468 MB, free: 7.301 MB / 334.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.895e-06/0.2815, allocations: 4.031 kB / 468 MB, free: 7.297 MB / 334.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.005551/0.287, allocations: 1.923 MB / 469.9 MB, free: 5.328 MB / 334.1 MB Notification: Performance of postOpt removeConstants (simulation): time 0.0003004/0.2873, allocations: 239.9 kB / 470.2 MB, free: 5.074 MB / 334.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001339/0.2875, allocations: 31.94 kB / 470.2 MB, free: 5.043 MB / 334.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0006436/0.2881, allocations: 51.88 kB / 470.2 MB, free: 4.992 MB / 334.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001332/0.2883, allocations: 60.58 kB / 470.3 MB, free: 4.934 MB / 334.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.125e-05/0.2883, allocations: 35.97 kB / 470.3 MB, free: 4.898 MB / 334.1 MB Notification: Performance of sorting global known variables: time 0.0004354/0.2888, allocations: 390.8 kB / 470.7 MB, free: 4.516 MB / 334.1 MB Notification: Performance of sort global known variables: time 1.332e-06/0.2888, allocations: 0 / 470.7 MB, free: 4.516 MB / 334.1 MB Notification: Performance of remove unused functions: time 0.0009183/0.2897, allocations: 343 kB / 471.1 MB, free: 4.18 MB / 334.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 3 * Number of states: 3 (converter.integrator.y,integrator.y,voltageSource.pin_p.reference.gamma) * Number of discrete variables: 16 ($whenCondition1,$whenCondition2,$whenCondition3,$whenCondition4,mpTracker.firstTrigger,mpTracker.sampleTrigger,mpTracker.counter,mpTracker.signv,mpTracker.vRef,irradiance.startDayOfYear,irradiance.dayOfYear,irradiance.daysOfYear,irradiance.year,irradiance.localDays,writeCSV.sampleTrigger,writeCSV.firstTrigger) * Number of discrete states: 16 (irradiance.daysOfYear,irradiance.year,irradiance.startDayOfYear,$whenCondition3,irradiance.dayOfYear,$whenCondition2,mpTracker.signv,mpTracker.vRef,mpTracker.firstTrigger,mpTracker.counter,$whenCondition1,mpTracker.sampleTrigger,mpTracker.power,writeCSV.firstTrigger,$whenCondition4,writeCSV.sampleTrigger) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (80): * Single equations (assignments): 77 * Array equations: 0 * Algorithm blocks: 2 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(1,4)} Notification: Performance of Backend phase and start with SimCode phase: time 0.00628/0.296, allocations: 2.718 MB / 473.8 MB, free: 1.48 MB / 334.1 MB Notification: Performance of simCode: created initialization part: time 0.002526/0.2985, allocations: 1.204 MB / 475 MB, free: 228 kB / 334.1 MB Notification: Performance of simCode: created event and clocks part: time 3.436e-06/0.2985, allocations: 5.375 kB / 475 MB, free: 224 kB / 334.1 MB Notification: Performance of simCode: created simulation system equations: time 0.001064/0.2996, allocations: 0.6583 MB / 475.6 MB, free: 15.52 MB / 350.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0007622/0.3004, allocations: 138.2 kB / 475.8 MB, free: 15.39 MB / 350.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01076/0.3112, allocations: 7.358 MB / 483.1 MB, free: 7.715 MB / 350.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005285/0.3117, allocations: 1.011 MB / 484.1 MB, free: 6.672 MB / 350.1 MB Notification: Performance of simCode: alias equations: time 0.0005248/0.3122, allocations: 130.4 kB / 484.3 MB, free: 6.539 MB / 350.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.000502/0.3128, allocations: 399.3 kB / 484.7 MB, free: 6.148 MB / 350.1 MB Notification: Performance of SimCode: time 5.31e-07/0.3128, allocations: 0 / 484.7 MB, free: 6.148 MB / 350.1 MB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.04458/0.3574, allocations: 20.49 MB / 0.4933 GB, free: 1.855 MB / 366.1 MB Notification: Performance of buildModelFMU: Generate platform static: time 10.43/10.79, allocations: 11.33 kB / 0.4933 GB, free: 1.848 MB / 366.1 MB (rm -f PhotoVoltaics_TGM_PhotoVoltaics_TGM.TGM_Comax_Analytical_20160808.pipe ; mkfifo PhotoVoltaics_TGM_PhotoVoltaics_TGM.TGM_Comax_Analytical_20160808.pipe ; head -c 1048576 < PhotoVoltaics_TGM_PhotoVoltaics_TGM.TGM_Comax_Analytical_20160808.pipe >> ../files/PhotoVoltaics_TGM_PhotoVoltaics_TGM.TGM_Comax_Analytical_20160808.sim & python3 -m fmpy simulate --output-file PhotoVoltaics_TGM_PhotoVoltaics_TGM.TGM_Comax_Analytical_20160808_res.csv --start-time 0 --stop-time 86400 --timeout 50 --relative-tolerance 1e-08 --interface-type ModelExchange --solver CVode --output-interval 60 PhotoVoltaics_TGM_PhotoVoltaics_TGM_TGM_Comax_Analytical_20160808.fmu > PhotoVoltaics_TGM_PhotoVoltaics_TGM.TGM_Comax_Analytical_20160808.pipe 2>&1)