Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_dev_IDEAS.Fluid.Chillers.Examples.Carnot_TEva.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/IDEAS 3.0.0-master/package.mo", uses=false) Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-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(IDEAS.Fluid.Chillers.Examples.Carnot_TEva,fileNamePrefix="IDEAS_dev_IDEAS_Fluid_Chillers_Examples_Carnot_TEva",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IDEAS.Fluid.Chillers.Examples.Carnot_TEva,fileNamePrefix="IDEAS_dev_IDEAS_Fluid_Chillers_Examples_Carnot_TEva",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 0.007902/0.007902, allocations: 105 kB / 15.74 MB, free: 5.996 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001387/0.001387, allocations: 198.2 kB / 16.68 MB, free: 5.918 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.404/1.404, allocations: 222.9 MB / 240.4 MB, free: 15.15 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 0.8205/0.8205, allocations: 135.1 MB / 425.7 MB, free: 4.098 MB / 334.1 MB Notification: Performance of FrontEnd - loaded program: time 0.00125/0.00125, allocations: 65.42 kB / 0.5851 GB, free: 21.93 MB / 446.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1676/0.1689, allocations: 80.92 MB / 0.6641 GB, free: 6.309 MB / 0.4981 GB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.Chillers.Examples.Carnot_TEva): time 0.06866/0.2376, allocations: 61.15 MB / 0.7239 GB, free: 8.949 MB / 0.5606 GB Notification: Performance of NFInst.instExpressions: time 0.01881/0.2564, allocations: 11.98 MB / 0.7356 GB, free: 12.93 MB / 0.5762 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.002608/0.2591, allocations: 59.62 kB / 0.7356 GB, free: 12.88 MB / 0.5762 GB Notification: Performance of NFTyping.typeComponents: time 0.002474/0.2616, allocations: 0.6713 MB / 0.7363 GB, free: 12.2 MB / 0.5762 GB Notification: Performance of NFTyping.typeBindings: time 0.006578/0.2682, allocations: 1.963 MB / 0.7382 GB, free: 10.23 MB / 0.5762 GB Notification: Performance of NFTyping.typeClassSections: time 0.003792/0.272, allocations: 1.204 MB / 0.7394 GB, free: 9.031 MB / 0.5762 GB Notification: Performance of NFFlatten.flatten: time 0.005147/0.2772, allocations: 3.087 MB / 0.7424 GB, free: 5.938 MB / 0.5762 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002056/0.2793, allocations: 1.092 MB / 0.7434 GB, free: 4.816 MB / 0.5762 GB Notification: Performance of NFEvalConstants.evaluate: time 0.00411/0.2834, allocations: 1.368 MB / 0.7448 GB, free: 3.445 MB / 0.5762 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002467/0.2859, allocations: 0.8906 MB / 0.7456 GB, free: 2.551 MB / 0.5762 GB Notification: Performance of NFPackage.collectConstants: time 0.0003048/0.2862, allocations: 116 kB / 0.7458 GB, free: 2.438 MB / 0.5762 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003439/0.2897, allocations: 1.443 MB / 0.7472 GB, free: 0.9922 MB / 0.5762 GB Notification: Performance of NFScalarize.scalarize: time 0.0004299/0.2901, allocations: 294.8 kB / 0.7474 GB, free: 0.7031 MB / 0.5762 GB Notification: Performance of NFVerifyModel.verify: time 0.001135/0.2913, allocations: 0.6997 MB / 0.7481 GB, free: 0 / 0.5762 GB Notification: Performance of NFConvertDAE.convert: time 0.3789/0.6701, allocations: 2.296 MB / 0.7504 GB, free: 23.26 MB / 0.5762 GB Notification: Performance of FrontEnd - DAE generated: time 7.565e-06/0.6702, allocations: 0 / 0.7504 GB, free: 23.26 MB / 0.5762 GB Notification: Performance of FrontEnd: time 2.455e-06/0.6702, allocations: 0.7031 kB / 0.7504 GB, free: 23.26 MB / 0.5762 GB Notification: Performance of Transformations before backend: time 3.107e-05/0.6703, allocations: 1.344 kB / 0.7504 GB, free: 23.26 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: 192 * Number of variables: 192 Notification: Performance of Generate backend data structure: time 0.003554/0.6738, allocations: 1.73 MB / 0.7521 GB, free: 22.4 MB / 0.5762 GB Notification: Performance of prepare preOptimizeDAE: time 4.433e-05/0.6739, allocations: 11.08 kB / 0.7521 GB, free: 22.4 MB / 0.5762 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001441/0.674, allocations: 122.5 kB / 0.7522 GB, free: 22.36 MB / 0.5762 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002333/0.6764, allocations: 411.3 kB / 0.7526 GB, free: 22.29 MB / 0.5762 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.002349/0.6787, allocations: 1.162 MB / 0.7537 GB, free: 21.92 MB / 0.5762 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.538e-05/0.6788, allocations: 63.59 kB / 0.7538 GB, free: 21.92 MB / 0.5762 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001145/0.6789, allocations: 78.84 kB / 0.7539 GB, free: 21.92 MB / 0.5762 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001997/0.6809, allocations: 1.002 MB / 0.7548 GB, free: 21.72 MB / 0.5762 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.537e-05/0.681, allocations: 3.969 kB / 0.7548 GB, free: 21.72 MB / 0.5762 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 8.399e-05/0.681, allocations: 33.28 kB / 0.7549 GB, free: 21.72 MB / 0.5762 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.964e-05/0.6811, allocations: 19.91 kB / 0.7549 GB, free: 21.72 MB / 0.5762 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002356/0.6834, allocations: 0.8473 MB / 0.7557 GB, free: 21.7 MB / 0.5762 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 0.006493/0.6899, allocations: 5.206 MB / 0.7608 GB, free: 18.61 MB / 0.5762 GB Notification: Performance of preOpt comSubExp (simulation): time 0.003625/0.6936, allocations: 0.7777 MB / 0.7616 GB, free: 18.57 MB / 0.5762 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0008403/0.6944, allocations: 303.5 kB / 0.7618 GB, free: 18.55 MB / 0.5762 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0004976/0.695, allocations: 0.905 MB / 0.7627 GB, free: 17.52 MB / 0.5762 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.366e-05/0.695, allocations: 44.41 kB / 0.7628 GB, free: 17.48 MB / 0.5762 GB Notification: Performance of pre-optimization done (n=43): time 2.404e-06/0.695, allocations: 0.5938 kB / 0.7628 GB, free: 17.48 MB / 0.5762 GB Notification: Performance of matching and sorting (n=43): time 0.008031/0.703, allocations: 1.691 MB / 0.7644 GB, free: 17.22 MB / 0.5762 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.5e-05/0.7031, allocations: 56.47 kB / 0.7645 GB, free: 17.16 MB / 0.5762 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001977/0.7051, allocations: 1.082 MB / 0.7655 GB, free: 17 MB / 0.5762 GB Notification: Performance of collectPreVariables (initialization): time 0.0001011/0.7052, allocations: 36.45 kB / 0.7656 GB, free: 16.97 MB / 0.5762 GB Notification: Performance of collectInitialEqns (initialization): time 0.0003609/0.7056, allocations: 0.5322 MB / 0.7661 GB, free: 16.77 MB / 0.5762 GB Notification: Performance of collectInitialBindings (initialization): time 0.000119/0.7057, allocations: 149.6 kB / 0.7662 GB, free: 16.68 MB / 0.5762 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002249/0.7059, allocations: 132.1 kB / 0.7664 GB, free: 16.66 MB / 0.5762 GB Notification: Performance of setup shared object (initialization): time 6.317e-05/0.706, allocations: 334.5 kB / 0.7667 GB, free: 16.35 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0008651/0.7069, allocations: 308.4 kB / 0.767 GB, free: 16.34 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001069/0.7079, allocations: 0.5269 MB / 0.7675 GB, free: 16.07 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001685/0.7096, allocations: 0.7175 MB / 0.7682 GB, free: 15.87 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 5.861e-06/0.7097, allocations: 1.594 kB / 0.7682 GB, free: 15.87 MB / 0.5762 GB Notification: Performance of matching and sorting (n=71) (initialization): time 0.002845/0.7125, allocations: 0.9975 MB / 0.7692 GB, free: 15.75 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 2.314e-05/0.7125, allocations: 8.344 kB / 0.7692 GB, free: 15.75 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.289e-05/0.7126, allocations: 5.984 kB / 0.7692 GB, free: 15.75 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001269/0.7138, allocations: 313.4 kB / 0.7695 GB, free: 15.73 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005544/0.7144, allocations: 129.8 kB / 0.7696 GB, free: 15.72 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001335/0.7157, allocations: 0.9003 MB / 0.7705 GB, free: 15.19 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001463/0.7172, allocations: 161.2 kB / 0.7706 GB, free: 15.14 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 9.095e-05/0.7173, allocations: 30.23 kB / 0.7707 GB, free: 15.14 MB / 0.5762 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001302/0.7186, allocations: 0.5069 MB / 0.7712 GB, free: 15.06 MB / 0.5762 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0009874/0.7196, allocations: 0.5269 MB / 0.7717 GB, free: 14.79 MB / 0.5762 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001578/0.7212, allocations: 0.7095 MB / 0.7724 GB, free: 14.59 MB / 0.5762 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 3.667e-06/0.7212, allocations: 1.375 kB / 0.7724 GB, free: 14.59 MB / 0.5762 GB Notification: Performance of matching and sorting (n=71) (initialization_lambda0): time 0.002665/0.7239, allocations: 1.009 MB / 0.7733 GB, free: 14.46 MB / 0.5762 GB Notification: Performance of prepare postOptimizeDAE: time 1.831e-05/0.7239, allocations: 6.906 kB / 0.7734 GB, free: 14.46 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.087e-06/0.724, allocations: 5.469 kB / 0.7734 GB, free: 14.46 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.001103/0.7251, allocations: 292.3 kB / 0.7736 GB, free: 14.44 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0005369/0.7256, allocations: 128.9 kB / 0.7738 GB, free: 14.44 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001287/0.7269, allocations: 0.8971 MB / 0.7746 GB, free: 13.91 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001319/0.7282, allocations: 135.2 kB / 0.7748 GB, free: 13.88 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.177e-05/0.7283, allocations: 29.86 kB / 0.7748 GB, free: 13.88 MB / 0.5762 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 23 * 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 (57): * Single equations (assignments): 56 * 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 {(1,14)} Notification: Performance of prepare postOptimizeDAE: time 0.0002522/0.7286, allocations: 229 kB / 0.775 GB, free: 13.69 MB / 0.5762 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001948/0.7288, allocations: 107.7 kB / 0.7751 GB, free: 13.64 MB / 0.5762 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002335/0.7311, allocations: 0.918 MB / 0.776 GB, free: 13.54 MB / 0.5762 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.901e-05/0.7312, allocations: 8.078 kB / 0.776 GB, free: 13.54 MB / 0.5762 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.432e-06/0.7312, allocations: 0 / 0.776 GB, free: 13.54 MB / 0.5762 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 7.084e-06/0.7312, allocations: 4.969 kB / 0.776 GB, free: 13.54 MB / 0.5762 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.005194/0.7364, allocations: 2.144 MB / 0.7781 GB, free: 13.12 MB / 0.5762 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 8.135e-06/0.7364, allocations: 2.438 kB / 0.7781 GB, free: 13.12 MB / 0.5762 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002709/0.7367, allocations: 62.83 kB / 0.7782 GB, free: 13.12 MB / 0.5762 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0009536/0.7376, allocations: 301 kB / 0.7785 GB, free: 13.1 MB / 0.5762 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.776e-05/0.7377, allocations: 11.19 kB / 0.7785 GB, free: 13.1 MB / 0.5762 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001251/0.7389, allocations: 0.9299 MB / 0.7794 GB, free: 12.56 MB / 0.5762 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.92e-06/0.739, allocations: 5.219 kB / 0.7794 GB, free: 12.56 MB / 0.5762 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003693/0.7427, allocations: 1.143 MB / 0.7805 GB, free: 12.26 MB / 0.5762 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0005611/0.7432, allocations: 262.8 kB / 0.7808 GB, free: 12.1 MB / 0.5762 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001435/0.7434, allocations: 16.73 kB / 0.7808 GB, free: 12.1 MB / 0.5762 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0007871/0.7442, allocations: 70.27 kB / 0.7808 GB, free: 12.09 MB / 0.5762 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001035/0.7443, allocations: 46.72 kB / 0.7809 GB, free: 12.09 MB / 0.5762 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.83e-05/0.7444, allocations: 22.81 kB / 0.7809 GB, free: 12.09 MB / 0.5762 GB Notification: Performance of sorting global known variables: time 0.001232/0.7456, allocations: 0.7544 MB / 0.7816 GB, free: 11.98 MB / 0.5762 GB Notification: Performance of sort global known variables: time 1.8e-07/0.7456, allocations: 0 / 0.7816 GB, free: 11.98 MB / 0.5762 GB Notification: Performance of remove unused functions: time 0.001661/0.7473, allocations: 0.563 MB / 0.7822 GB, free: 11.9 MB / 0.5762 GB Notification: Model statistics after passing the back-end for simulation: * 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 simulation (33): * Single equations (assignments): 28 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 4 * 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 {(1,16)} Notification: Performance of Backend phase and start with SimCode phase: time 0.004353/0.7516, allocations: 1.962 MB / 0.7841 GB, free: 11.02 MB / 0.5762 GB Notification: Performance of simCode: created initialization part: time 0.003013/0.7547, allocations: 1.124 MB / 0.7852 GB, free: 10.98 MB / 0.5762 GB Notification: Performance of simCode: created event and clocks part: time 4.909e-06/0.7547, allocations: 0 / 0.7852 GB, free: 10.98 MB / 0.5762 GB Notification: Performance of simCode: created simulation system equations: time 0.0007813/0.7555, allocations: 341.6 kB / 0.7855 GB, free: 10.97 MB / 0.5762 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002213/0.7577, allocations: 0.5086 MB / 0.786 GB, free: 10.89 MB / 0.5762 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01473/0.7724, allocations: 8.41 MB / 0.7942 GB, free: 8.352 MB / 0.5762 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004242/0.7729, allocations: 1.058 MB / 0.7953 GB, free: 7.637 MB / 0.5762 GB Notification: Performance of simCode: alias equations: time 0.0008944/0.7738, allocations: 230.7 kB / 0.7955 GB, free: 7.574 MB / 0.5762 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0004268/0.7742, allocations: 418.4 kB / 0.7959 GB, free: 7.566 MB / 0.5762 GB Notification: Performance of SimCode: time 1.233e-06/0.7742, allocations: 0 / 0.7959 GB, free: 7.566 MB / 0.5762 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.07079/0.845, allocations: 34.16 MB / 0.8293 GB, free: 10.98 MB / 0.6075 GB Notification: Performance of buildModelFMU: Generate platform static: time 13.49/14.34, allocations: 11.61 kB / 0.8293 GB, free: 10.97 MB / 0.6075 GB (rm -f IDEAS_dev_IDEAS.Fluid.Chillers.Examples.Carnot_TEva.pipe ; mkfifo IDEAS_dev_IDEAS.Fluid.Chillers.Examples.Carnot_TEva.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Fluid.Chillers.Examples.Carnot_TEva.pipe >> ../files/IDEAS_dev_IDEAS.Fluid.Chillers.Examples.Carnot_TEva.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator --tempDir=temp_IDEAS_dev_IDEAS_Fluid_Chillers_Examples_Carnot_TEva_fmu --startTime=0 --stopTime=3600 --timeout=50 --tolerance=1e-06 IDEAS_dev_IDEAS_Fluid_Chillers_Examples_Carnot_TEva.fmu > IDEAS_dev_IDEAS.Fluid.Chillers.Examples.Carnot_TEva.pipe 2>&1)