Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47.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/package.mo", uses=false)
Using package IDEAS with version 3.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/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)
Running command: translateModel(IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47")
translateModel(IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47")
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001361/0.00136, allocations: 104.1 kB / 16.41 MB, free: 6.465 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001325/0.001325, allocations: 189.7 kB / 17.34 MB, free: 5.715 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.34/1.34, allocations: 222.9 MB / 241 MB, free: 15.13 MB / 206.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/package.mo): time 0.8032/0.8032, allocations: 132.2 MB / 423.4 MB, free: 6.562 MB / 334.1 MB
Notification: Performance of FrontEnd - loaded program: time 0.00123/0.00123, allocations: 61.3 kB / 0.582 GB, free: 23.72 MB / 446.1 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.1635/0.1647, allocations: 80.21 MB / 0.6603 GB, free: 10.22 MB / 0.4981 GB
Notification: Performance of NFInst.instantiate(IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47): time 0.04871/0.2135, allocations: 40.32 MB / 0.6997 GB, free: 1.762 MB / 0.5294 GB
Notification: Performance of NFInst.instExpressions: time 0.00881/0.2223, allocations: 4.065 MB / 0.7037 GB, free: 13.68 MB / 0.545 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.001561/0.2239, allocations: 35.81 kB / 0.7037 GB, free: 13.65 MB / 0.545 GB
Notification: Performance of NFTyping.typeComponents: time 0.001344/0.2254, allocations: 349.6 kB / 0.704 GB, free: 13.3 MB / 0.545 GB
Notification: Performance of NFTyping.typeBindings: time 0.006788/0.2322, allocations: 2.498 MB / 0.7065 GB, free: 10.8 MB / 0.545 GB
Notification: Performance of NFTyping.typeClassSections: time 0.002678/0.2349, allocations: 0.9201 MB / 0.7074 GB, free: 9.891 MB / 0.545 GB
Notification: Performance of NFFlatten.flatten: time 0.003505/0.2384, allocations: 2.194 MB / 0.7095 GB, free: 7.695 MB / 0.545 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.001314/0.2397, allocations: 0.6372 MB / 0.7101 GB, free: 7.047 MB / 0.545 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.005015/0.2447, allocations: 2.404 MB / 0.7125 GB, free: 4.641 MB / 0.545 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.001285/0.2461, allocations: 0.56 MB / 0.713 GB, free: 4.078 MB / 0.545 GB
Notification: Performance of NFPackage.collectConstants: time 0.0002119/0.2463, allocations: 60 kB / 0.7131 GB, free: 4.02 MB / 0.545 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.006183/0.2525, allocations: 3.186 MB / 0.7162 GB, free: 0.8281 MB / 0.545 GB
Notification: Performance of NFScalarize.scalarize: time 0.0003695/0.2529, allocations: 183.3 kB / 0.7164 GB, free: 0.6484 MB / 0.545 GB
Notification: Performance of NFVerifyModel.verify: time 0.0008803/0.2538, allocations: 394.1 kB / 0.7168 GB, free: 268 kB / 0.545 GB
Notification: Performance of NFConvertDAE.convert: time 0.004493/0.2583, allocations: 1.831 MB / 0.7186 GB, free: 14.43 MB / 0.5606 GB
Notification: Performance of FrontEnd - DAE generated: time 5.11e-06/0.2583, allocations: 4 kB / 0.7186 GB, free: 14.42 MB / 0.5606 GB
Notification: Performance of FrontEnd: time 1.753e-06/0.2583, allocations: 0 / 0.7186 GB, free: 14.42 MB / 0.5606 GB
Notification: Performance of Transformations before backend: time 2.711e-05/0.2584, allocations: 4 kB / 0.7186 GB, free: 14.42 MB / 0.5606 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 112
 * Number of variables: 112
Notification: Performance of Generate backend data structure: time 0.002021/0.2604, allocations: 1.186 MB / 0.7197 GB, free: 13.18 MB / 0.5606 GB
Notification: Performance of prepare preOptimizeDAE: time 4.759e-05/0.2604, allocations: 12.03 kB / 0.7197 GB, free: 13.17 MB / 0.5606 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001233/0.2617, allocations: 159.9 kB / 0.7199 GB, free: 13.02 MB / 0.5606 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.00174/0.2634, allocations: 0.7827 MB / 0.7206 GB, free: 12.19 MB / 0.5606 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.529e-05/0.2635, allocations: 36.94 kB / 0.7207 GB, free: 12.15 MB / 0.5606 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 7.501e-05/0.2636, allocations: 51.98 kB / 0.7207 GB, free: 12.1 MB / 0.5606 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.0008712/0.2644, allocations: 0.5118 MB / 0.7212 GB, free: 11.56 MB / 0.5606 GB
Notification: Performance of preOpt findStateOrder (simulation): time 2.274e-05/0.2645, allocations: 11.92 kB / 0.7212 GB, free: 11.55 MB / 0.5606 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.708e-05/0.2645, allocations: 20 kB / 0.7213 GB, free: 11.53 MB / 0.5606 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.415e-05/0.2645, allocations: 12 kB / 0.7213 GB, free: 11.52 MB / 0.5606 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0005281/0.2651, allocations: 335.7 kB / 0.7216 GB, free: 11.18 MB / 0.5606 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 0.002695/0.2678, allocations: 2.443 MB / 0.724 GB, free: 8.566 MB / 0.5606 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0004288/0.2682, allocations: 275.4 kB / 0.7242 GB, free: 8.289 MB / 0.5606 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0001866/0.2684, allocations: 136.8 kB / 0.7244 GB, free: 8.152 MB / 0.5606 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.0009288/0.2694, allocations: 1.37 MB / 0.7257 GB, free: 6.469 MB / 0.5606 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.222e-05/0.2694, allocations: 43.03 kB / 0.7257 GB, free: 6.418 MB / 0.5606 GB
Notification: Performance of pre-optimization done (n=31): time 1.783e-06/0.2694, allocations: 0 / 0.7257 GB, free: 6.418 MB / 0.5606 GB
Notification: Performance of matching and sorting (n=43): time 0.004307/0.2737, allocations: 1.789 MB / 0.7275 GB, free: 4.535 MB / 0.5606 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 4.375e-05/0.2738, allocations: 59.41 kB / 0.7276 GB, free: 4.465 MB / 0.5606 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0006573/0.2744, allocations: 0.4991 MB / 0.728 GB, free: 3.957 MB / 0.5606 GB
Notification: Performance of collectPreVariables (initialization): time 4.462e-05/0.2745, allocations: 33.7 kB / 0.7281 GB, free: 3.918 MB / 0.5606 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0002654/0.2748, allocations: 328.4 kB / 0.7284 GB, free: 3.59 MB / 0.5606 GB
Notification: Performance of collectInitialBindings (initialization): time 0.0001471/0.2749, allocations: 149.8 kB / 0.7285 GB, free: 3.441 MB / 0.5606 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001533/0.2751, allocations: 102.1 kB / 0.7286 GB, free: 3.336 MB / 0.5606 GB
Notification: Performance of setup shared object (initialization): time 0.0001544/0.2753, allocations: 362.8 kB / 0.729 GB, free: 2.973 MB / 0.5606 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0002589/0.2755, allocations: 155 kB / 0.7291 GB, free: 2.816 MB / 0.5606 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0003376/0.2759, allocations: 274.7 kB / 0.7294 GB, free: 2.504 MB / 0.5606 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0006175/0.2765, allocations: 445 kB / 0.7298 GB, free: 2.031 MB / 0.5606 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.414e-06/0.2765, allocations: 0 / 0.7298 GB, free: 2.031 MB / 0.5606 GB
Notification: Performance of matching and sorting (n=57) (initialization): time 0.001066/0.2776, allocations: 0.607 MB / 0.7304 GB, free: 1.41 MB / 0.5606 GB
Notification: Performance of prepare postOptimizeDAE: time 1.713e-05/0.2776, allocations: 4 kB / 0.7304 GB, free: 1.406 MB / 0.5606 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.963e-06/0.2776, allocations: 4.047 kB / 0.7304 GB, free: 1.402 MB / 0.5606 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.0007758/0.2784, allocations: 201.5 kB / 0.7306 GB, free: 1.199 MB / 0.5606 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002532/0.2787, allocations: 76.16 kB / 0.7307 GB, free: 1.125 MB / 0.5606 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001155/0.2798, allocations: 1.351 MB / 0.732 GB, free: 15.72 MB / 0.5762 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004404/0.2803, allocations: 12 kB / 0.732 GB, free: 15.71 MB / 0.5762 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.132e-05/0.2804, allocations: 27.98 kB / 0.732 GB, free: 15.68 MB / 0.5762 GB
Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0004808/0.2808, allocations: 313.3 kB / 0.7323 GB, free: 15.38 MB / 0.5762 GB
Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0003259/0.2812, allocations: 262.4 kB / 0.7326 GB, free: 15.07 MB / 0.5762 GB
Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0006114/0.2818, allocations: 442.7 kB / 0.733 GB, free: 14.6 MB / 0.5762 GB
Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.595e-06/0.2818, allocations: 0 / 0.733 GB, free: 14.6 MB / 0.5762 GB
Notification: Performance of matching and sorting (n=57) (initialization_lambda0): time 0.001059/0.2829, allocations: 0.6031 MB / 0.7336 GB, free: 13.98 MB / 0.5762 GB
Notification: Performance of prepare postOptimizeDAE: time 1.606e-05/0.2829, allocations: 8 kB / 0.7336 GB, free: 13.98 MB / 0.5762 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.901e-06/0.2829, allocations: 4 kB / 0.7336 GB, free: 13.97 MB / 0.5762 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.0007123/0.2836, allocations: 197.9 kB / 0.7338 GB, free: 13.77 MB / 0.5762 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002192/0.2839, allocations: 67.91 kB / 0.7339 GB, free: 13.71 MB / 0.5762 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001051/0.2849, allocations: 1.351 MB / 0.7352 GB, free: 12.3 MB / 0.5762 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004209/0.2854, allocations: 19.98 kB / 0.7352 GB, free: 12.29 MB / 0.5762 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 3.802e-05/0.2854, allocations: 20.12 kB / 0.7352 GB, free: 12.27 MB / 0.5762 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 (41):
 * Single equations (assignments): 39
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 2
 * 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): 2 systems
   {(2,8), (1,7)}
Notification: Performance of prepare postOptimizeDAE: time 0.0002262/0.2856, allocations: 208.1 kB / 0.7354 GB, free: 12.05 MB / 0.5762 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001639/0.2858, allocations: 63.25 kB / 0.7355 GB, free: 11.99 MB / 0.5762 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001306/0.2871, allocations: 0.6328 MB / 0.7361 GB, free: 11.35 MB / 0.5762 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.143e-05/0.2872, allocations: 4 kB / 0.7361 GB, free: 11.35 MB / 0.5762 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 5.941e-06/0.2872, allocations: 0 / 0.7361 GB, free: 11.35 MB / 0.5762 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.0009027/0.2881, allocations: 0.6588 MB / 0.7367 GB, free: 10.63 MB / 0.5762 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002389/0.2905, allocations: 1.447 MB / 0.7381 GB, free: 9.121 MB / 0.5762 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.101e-06/0.2905, allocations: 0 / 0.7381 GB, free: 9.121 MB / 0.5762 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001796/0.2907, allocations: 55.84 kB / 0.7382 GB, free: 9.066 MB / 0.5762 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.000983/0.2917, allocations: 217.5 kB / 0.7384 GB, free: 8.848 MB / 0.5762 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.355e-05/0.2917, allocations: 15.94 kB / 0.7384 GB, free: 8.832 MB / 0.5762 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001076/0.2928, allocations: 1.319 MB / 0.7397 GB, free: 7.461 MB / 0.5762 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.798e-06/0.2928, allocations: 4.219 kB / 0.7397 GB, free: 7.457 MB / 0.5762 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001463/0.2943, allocations: 0.8745 MB / 0.7406 GB, free: 6.555 MB / 0.5762 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.0003129/0.2946, allocations: 200.3 kB / 0.7408 GB, free: 6.34 MB / 0.5762 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001308/0.2948, allocations: 11.94 kB / 0.7408 GB, free: 6.328 MB / 0.5762 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0004435/0.2952, allocations: 12 kB / 0.7408 GB, free: 6.316 MB / 0.5762 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 5.347e-05/0.2953, allocations: 27.95 kB / 0.7408 GB, free: 6.289 MB / 0.5762 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 5.072e-05/0.2953, allocations: 19.98 kB / 0.7408 GB, free: 6.27 MB / 0.5762 GB
Notification: Performance of sorting global known variables: time 0.0005137/0.2958, allocations: 354.8 kB / 0.7412 GB, free: 5.926 MB / 0.5762 GB
Notification: Performance of sort global known variables: time 3.1e-07/0.2958, allocations: 0 / 0.7412 GB, free: 5.926 MB / 0.5762 GB
Notification: Performance of remove unused functions: time 0.001528/0.2974, allocations: 467.8 kB / 0.7416 GB, free: 5.469 MB / 0.5762 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 2
 * Number of states: 2 (vol.dynBal.medium.T,vol1.dynBal.medium.T)
 * 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 (30):
 * Single equations (assignments): 27
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 1
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 2
 * 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): 2 systems
   {(2,7), (2,5)}
Notification: Performance of Backend phase and start with SimCode phase: time 0.001128/0.2985, allocations: 456 kB / 0.742 GB, free: 5.023 MB / 0.5762 GB
Notification: Performance of simCode: created initialization part: time 0.001348/0.2999, allocations: 0.6725 MB / 0.7427 GB, free: 4.352 MB / 0.5762 GB
Notification: Performance of simCode: created event and clocks part: time 3.136e-06/0.2999, allocations: 0 / 0.7427 GB, free: 4.352 MB / 0.5762 GB
Notification: Performance of simCode: created simulation system equations: time 0.000502/0.3004, allocations: 251.6 kB / 0.7429 GB, free: 4.105 MB / 0.5762 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001624/0.302, allocations: 323.3 kB / 0.7433 GB, free: 3.809 MB / 0.5762 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002172/0.3042, allocations: 1.239 MB / 0.7445 GB, free: 2.539 MB / 0.5762 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005102/0.3047, allocations: 0.9144 MB / 0.7454 GB, free: 1.598 MB / 0.5762 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001868/0.3049, allocations: 67.39 kB / 0.7454 GB, free: 1.531 MB / 0.5762 GB
Notification: Performance of SimCode: time 1.002e-06/0.305, allocations: 0 / 0.7454 GB, free: 1.531 MB / 0.5762 GB
Notification: Performance of Templates: time 0.3587/0.6637, allocations: 18.43 MB / 0.7634 GB, free: 77.68 MB / 0.5762 GB
make -j1 -f IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47.makefile
(rm -f IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47.pipe ; mkfifo IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47.pipe ; head -c 1048576 < IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47.pipe >> ../files/IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47.sim & ./IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47  -abortSlowSimulation -alarm=480 -lv LOG_STATS > IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47.pipe 2>&1)