Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildingSystems_BuildingSystems.BoundaryConditions.SolarIrradiation.Examples.DirectTiltedSurface.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 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo", uses=false) Using package BuildingSystems with version 2.0.0-beta (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo) Using package NcDataReader2 with version 2.5.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/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) Running command: "" <> buildModelFMU(BuildingSystems.BoundaryConditions.SolarIrradiation.Examples.DirectTiltedSurface,fileNamePrefix="BuildingSystems_BuildingSystems_BoundaryConditions_SolarIrradiation_Examples_DirectTiltedSurface",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(BuildingSystems.BoundaryConditions.SolarIrradiation.Examples.DirectTiltedSurface,fileNamePrefix="BuildingSystems_BuildingSystems_BoundaryConditions_SolarIrradiation_Examples_DirectTiltedSurface",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 0.001043/0.001043, allocations: 108 kB / 15.6 MB, free: 132 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001062/0.001062, allocations: 194.7 kB / 16.53 MB, free: 6.391 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.295/1.295, allocations: 222.9 MB / 240.2 MB, free: 4.41 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo): time 0.002101/0.002101, allocations: 295 kB / 290.7 MB, free: 2.004 MB / 238.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo): time 0.9336/0.9336, allocations: 169.2 MB / 0.4982 GB, free: 13.93 MB / 382.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001724/0.001724, allocations: 99 kB / 0.5953 GB, free: 28.04 MB / 430.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1286/0.1303, allocations: 86.98 MB / 0.6803 GB, free: 0.5742 MB / 478.1 MB Notification: Performance of NFInst.instantiate(BuildingSystems.BoundaryConditions.SolarIrradiation.Examples.DirectTiltedSurface): time 0.006467/0.1368, allocations: 5.316 MB / 0.6855 GB, free: 11.25 MB / 494.1 MB Notification: Performance of NFInst.instExpressions: time 0.404/0.5408, allocations: 151 MB / 0.8329 GB, free: 1.07 MB / 0.5606 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0008134/0.5416, allocations: 23 kB / 0.8329 GB, free: 1.062 MB / 0.5606 GB Notification: Performance of NFTyping.typeComponents: time 0.0005344/0.5422, allocations: 199.4 kB / 0.8331 GB, free: 0.9492 MB / 0.5606 GB Notification: Performance of NFTyping.typeBindings: time 0.001582/0.5438, allocations: 0.6385 MB / 0.8337 GB, free: 0.7539 MB / 0.5606 GB Notification: Performance of NFTyping.typeClassSections: time 0.001799/0.5456, allocations: 0.9998 MB / 0.8347 GB, free: 0.6797 MB / 0.5606 GB Notification: Performance of NFFlatten.flatten: time 0.00139/0.547, allocations: 1.801 MB / 0.8365 GB, free: 400 kB / 0.5606 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001164/0.5482, allocations: 1.17 MB / 0.8376 GB, free: 144 kB / 0.5606 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0007984/0.549, allocations: 0.7632 MB / 0.8384 GB, free: 15.99 MB / 0.5762 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0007288/0.5497, allocations: 0.8402 MB / 0.8392 GB, free: 15.8 MB / 0.5762 GB Notification: Performance of NFPackage.collectConstants: time 0.0002638/0.55, allocations: 222.5 kB / 0.8394 GB, free: 15.8 MB / 0.5762 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0008768/0.5509, allocations: 0.5453 MB / 0.8399 GB, free: 15.79 MB / 0.5762 GB Notification: Performance of NFScalarize.scalarize: time 0.0003243/0.5512, allocations: 497 kB / 0.8404 GB, free: 15.71 MB / 0.5762 GB Notification: Performance of NFVerifyModel.verify: time 0.0006729/0.5519, allocations: 0.9119 MB / 0.8413 GB, free: 15.4 MB / 0.5762 GB Notification: Performance of NFConvertDAE.convert: time 0.00232/0.5542, allocations: 2.518 MB / 0.8438 GB, free: 13.96 MB / 0.5762 GB Notification: Performance of FrontEnd - DAE generated: time 4.549e-06/0.5542, allocations: 4.906 kB / 0.8438 GB, free: 13.95 MB / 0.5762 GB Notification: Performance of FrontEnd: time 1.163e-06/0.5542, allocations: 0 / 0.8438 GB, free: 13.95 MB / 0.5762 GB Notification: Performance of Transformations before backend: time 2.575e-05/0.5543, allocations: 0 / 0.8438 GB, free: 13.95 MB / 0.5762 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 398 * Number of variables: 398 Notification: Performance of Generate backend data structure: time 0.003489/0.5578, allocations: 2.006 MB / 0.8457 GB, free: 12.42 MB / 0.5762 GB Notification: Performance of prepare preOptimizeDAE: time 3.966e-05/0.5578, allocations: 8.281 kB / 0.8457 GB, free: 12.42 MB / 0.5762 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0002332/0.5581, allocations: 228.4 kB / 0.8459 GB, free: 12.24 MB / 0.5762 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0009964/0.5591, allocations: 256.3 kB / 0.8462 GB, free: 12.11 MB / 0.5762 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001231/0.5603, allocations: 0.9758 MB / 0.8471 GB, free: 11.34 MB / 0.5762 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.000127/0.5604, allocations: 146.4 kB / 0.8473 GB, free: 11.25 MB / 0.5762 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001651/0.5606, allocations: 149.2 kB / 0.8474 GB, free: 11.2 MB / 0.5762 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002369/0.563, allocations: 1.588 MB / 0.849 GB, free: 10.22 MB / 0.5762 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.545e-05/0.563, allocations: 0 / 0.849 GB, free: 10.22 MB / 0.5762 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001307/0.5632, allocations: 63.44 kB / 0.849 GB, free: 10.17 MB / 0.5762 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.078e-05/0.5632, allocations: 37.28 kB / 0.8491 GB, free: 10.17 MB / 0.5762 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002361/0.5656, allocations: 1.599 MB / 0.8506 GB, free: 9.391 MB / 0.5762 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.005855/0.5714, allocations: 4.253 MB / 0.8548 GB, free: 6.234 MB / 0.5762 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001761/0.5732, allocations: 1.094 MB / 0.8559 GB, free: 5.688 MB / 0.5762 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0006642/0.5739, allocations: 426.1 kB / 0.8563 GB, free: 5.473 MB / 0.5762 GB Notification: Performance of preOpt evalFunc (simulation): time 8.793e-05/0.574, allocations: 43.17 kB / 0.8563 GB, free: 5.457 MB / 0.5762 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.00113/0.5751, allocations: 0.7045 MB / 0.857 GB, free: 5.016 MB / 0.5762 GB Notification: Performance of pre-optimization done (n=111): time 2.966e-06/0.5751, allocations: 0 / 0.857 GB, free: 5.016 MB / 0.5762 GB Notification: Performance of matching and sorting (n=111): time 0.003664/0.5788, allocations: 1.651 MB / 0.8586 GB, free: 4.133 MB / 0.5762 GB Notification: Performance of inlineWhenForInitialization (initialization): time 9.301e-05/0.5789, allocations: 197 kB / 0.8588 GB, free: 3.91 MB / 0.5762 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0009487/0.5798, allocations: 0.8458 MB / 0.8596 GB, free: 3.418 MB / 0.5762 GB Notification: Performance of collectPreVariables (initialization): time 7.803e-05/0.5799, allocations: 49.2 kB / 0.8597 GB, free: 3.371 MB / 0.5762 GB Notification: Performance of collectInitialEqns (initialization): time 0.000419/0.5804, allocations: 0.6096 MB / 0.8603 GB, free: 2.832 MB / 0.5762 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002614/0.5806, allocations: 363.9 kB / 0.8606 GB, free: 2.523 MB / 0.5762 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002861/0.5809, allocations: 210.5 kB / 0.8608 GB, free: 2.398 MB / 0.5762 GB Notification: Performance of setup shared object (initialization): time 0.0001243/0.5811, allocations: 344.1 kB / 0.8611 GB, free: 2.066 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006677/0.5817, allocations: 374.3 kB / 0.8615 GB, free: 1.879 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.000783/0.5825, allocations: 0.5071 MB / 0.862 GB, free: 1.562 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001438/0.584, allocations: 0.8544 MB / 0.8628 GB, free: 1.098 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.966e-06/0.584, allocations: 0 / 0.8628 GB, free: 1.098 MB / 0.5762 GB Notification: Performance of matching and sorting (n=129) (initialization): time 0.002335/0.5863, allocations: 1.148 MB / 0.8639 GB, free: 0.5078 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 1.618e-05/0.5863, allocations: 9.75 kB / 0.864 GB, free: 0.5078 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.722e-06/0.5864, allocations: 0 / 0.864 GB, free: 0.5078 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0005782/0.5869, allocations: 85.58 kB / 0.864 GB, free: 476 kB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0008644/0.5878, allocations: 222.9 kB / 0.8643 GB, free: 416 kB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.002042/0.5899, allocations: 1.652 MB / 0.8659 GB, free: 14.79 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000865/0.5907, allocations: 132.8 kB / 0.866 GB, free: 14.7 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.481e-05/0.5908, allocations: 47.81 kB / 0.866 GB, free: 14.68 MB / 0.5919 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 5 * Number of states: 0 () * Number of discrete variables: 24 (HDirWal.incAng.decAng.tNext,$PRE.HDirWal.incAng.decAng.tNext,HDirFlo.incAng.decAng.tNext,$PRE.HDirFlo.incAng.decAng.tNext,HDirRoo.incAng.decAng.tNext,$PRE.HDirRoo.incAng.decAng.tNext,weaDat.decAng.tNext,$PRE.weaDat.decAng.tNext,weaDat.eqnTim.tNext,$PRE.weaDat.eqnTim.tNext,weaDat.conTim.tNext,$PRE.weaDat.conTim.tNext,weaDat.conTimMin.tNext,$PRE.weaDat.conTimMin.tNext,weaDat.locTim.tNext,$PRE.weaDat.locTim.tNext,$whenCondition1,$whenCondition2,$whenCondition3,$whenCondition4,$whenCondition5,$whenCondition6,$whenCondition7,$whenCondition8) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (127): * Single equations (assignments): 126 * Array equations: 0 * Algorithm blocks: 0 * 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 {(1,2)} Notification: Performance of prepare postOptimizeDAE: time 0.0004962/0.5913, allocations: 349.6 kB / 0.8664 GB, free: 14.43 MB / 0.5919 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002018/0.5915, allocations: 111.7 kB / 0.8665 GB, free: 14.37 MB / 0.5919 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003074/0.5946, allocations: 1.536 MB / 0.868 GB, free: 13.51 MB / 0.5919 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.746e-06/0.5946, allocations: 12.28 kB / 0.868 GB, free: 13.51 MB / 0.5919 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 3.176e-06/0.5947, allocations: 0 / 0.868 GB, free: 13.51 MB / 0.5919 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.388e-05/0.5947, allocations: 7.969 kB / 0.868 GB, free: 13.5 MB / 0.5919 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001349/0.596, allocations: 1.375 MB / 0.8693 GB, free: 12.52 MB / 0.5919 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.178e-06/0.596, allocations: 2.406 kB / 0.8693 GB, free: 12.52 MB / 0.5919 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.000772/0.5968, allocations: 196.3 kB / 0.8695 GB, free: 12.48 MB / 0.5919 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0004306/0.5973, allocations: 77.06 kB / 0.8696 GB, free: 12.44 MB / 0.5919 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.014e-05/0.5973, allocations: 33.72 kB / 0.8696 GB, free: 12.41 MB / 0.5919 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001734/0.5991, allocations: 1.678 MB / 0.8713 GB, free: 10.79 MB / 0.5919 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.252e-06/0.5991, allocations: 0 / 0.8713 GB, free: 10.79 MB / 0.5919 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002353/0.6015, allocations: 1.29 MB / 0.8725 GB, free: 10.11 MB / 0.5919 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0004285/0.6019, allocations: 353.8 kB / 0.8729 GB, free: 9.801 MB / 0.5919 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001631/0.6021, allocations: 34.12 kB / 0.8729 GB, free: 9.777 MB / 0.5919 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0008474/0.6029, allocations: 81.78 kB / 0.873 GB, free: 9.734 MB / 0.5919 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001727/0.6031, allocations: 96.77 kB / 0.8731 GB, free: 9.684 MB / 0.5919 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 8.693e-05/0.6032, allocations: 54.61 kB / 0.8731 GB, free: 9.66 MB / 0.5919 GB Notification: Performance of sorting global known variables: time 0.0007216/0.6039, allocations: 0.6178 MB / 0.8737 GB, free: 9.301 MB / 0.5919 GB Notification: Performance of sort global known variables: time 2.11e-07/0.6039, allocations: 0 / 0.8737 GB, free: 9.301 MB / 0.5919 GB Notification: Performance of remove unused functions: time 0.0009496/0.6049, allocations: 444 kB / 0.8742 GB, free: 9.16 MB / 0.5919 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 0 () * Number of discrete variables: 16 ($whenCondition8,$whenCondition7,$whenCondition6,$whenCondition5,$whenCondition4,$whenCondition3,$whenCondition2,$whenCondition1,weaDat.locTim.tNext,weaDat.conTimMin.tNext,weaDat.conTim.tNext,weaDat.eqnTim.tNext,weaDat.decAng.tNext,HDirRoo.incAng.decAng.tNext,HDirFlo.incAng.decAng.tNext,HDirWal.incAng.decAng.tNext) * Number of discrete states: 8 (weaDat.locTim.tNext,weaDat.conTimMin.tNext,weaDat.conTim.tNext,weaDat.eqnTim.tNext,weaDat.decAng.tNext,HDirRoo.incAng.decAng.tNext,HDirFlo.incAng.decAng.tNext,HDirWal.incAng.decAng.tNext) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (128): * Single equations (assignments): 119 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 8 * 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 {(1,3)} Notification: Performance of Backend phase and start with SimCode phase: time 0.003761/0.6087, allocations: 2.357 MB / 0.8765 GB, free: 7.766 MB / 0.5919 GB Notification: Performance of simCode: created initialization part: time 0.003251/0.6119, allocations: 1.396 MB / 0.8778 GB, free: 6.516 MB / 0.5919 GB Notification: Performance of simCode: created event and clocks part: time 3.066e-06/0.6119, allocations: 0 / 0.8778 GB, free: 6.516 MB / 0.5919 GB Notification: Performance of simCode: created simulation system equations: time 0.001158/0.6131, allocations: 0.6818 MB / 0.8785 GB, free: 5.82 MB / 0.5919 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001266/0.6144, allocations: 315.5 kB / 0.8788 GB, free: 5.535 MB / 0.5919 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01579/0.6302, allocations: 9.373 MB / 0.8879 GB, free: 11.85 MB / 0.6075 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0008327/0.6311, allocations: 1.216 MB / 0.8891 GB, free: 10.6 MB / 0.6075 GB Notification: Performance of simCode: alias equations: time 0.001102/0.6322, allocations: 324.9 kB / 0.8894 GB, free: 10.28 MB / 0.6075 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0008505/0.633, allocations: 0.6047 MB / 0.89 GB, free: 9.672 MB / 0.6075 GB Notification: Performance of SimCode: time 6.62e-07/0.633, allocations: 4 kB / 0.89 GB, free: 9.668 MB / 0.6075 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.05635/0.6894, allocations: 28.43 MB / 0.9178 GB, free: 13.66 MB / 0.6387 GB Notification: Performance of buildModelFMU: Generate platform static: time 11.04/11.73, allocations: 7.75 kB / 0.9178 GB, free: 13.66 MB / 0.6387 GB (rm -f BuildingSystems_BuildingSystems.BoundaryConditions.SolarIrradiation.Examples.DirectTiltedSurface.pipe ; mkfifo BuildingSystems_BuildingSystems.BoundaryConditions.SolarIrradiation.Examples.DirectTiltedSurface.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.BoundaryConditions.SolarIrradiation.Examples.DirectTiltedSurface.pipe >> ../files/BuildingSystems_BuildingSystems.BoundaryConditions.SolarIrradiation.Examples.DirectTiltedSurface.sim & python3 -m fmpy simulate --output-file BuildingSystems_BuildingSystems.BoundaryConditions.SolarIrradiation.Examples.DirectTiltedSurface_res.csv --start-time 1.82304e+07 --stop-time 1.83168e+07 --timeout 50 --relative-tolerance 1e-06 --interface-type ModelExchange --solver CVode --output-interval 34.56 BuildingSystems_BuildingSystems_BoundaryConditions_SolarIrradiation_Examples_DirectTiltedSurface.fmu > BuildingSystems_BuildingSystems.BoundaryConditions.SolarIrradiation.Examples.DirectTiltedSurface.pipe 2>&1)