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 0.001265/0.001266, allocations: 110 kB / 16.37 MB, free: 6.469 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001223/0.001223, allocations: 195.8 kB / 17.31 MB, free: 5.824 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.338/1.338, allocations: 222.9 MB / 241 MB, free: 15.18 MB / 206.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/package.mo): time 0.7921/0.7921, allocations: 132.2 MB / 423.4 MB, free: 6.641 MB / 334.1 MB
Notification: Performance of FrontEnd - loaded program: time 0.001182/0.001182, allocations: 59.91 kB / 0.5032 GB, free: 10.97 MB / 430.1 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.3324/0.3336, allocations: 80.18 MB / 0.5815 GB, free: 27.81 MB / 446.1 MB
Notification: Performance of NFInst.instantiate(IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47): time 0.03321/0.3668, allocations: 40.33 MB / 0.6209 GB, free: 6.004 MB / 462.1 MB
Notification: Performance of NFInst.instExpressions: time 0.007307/0.3742, allocations: 4.07 MB / 0.6248 GB, free: 1.93 MB / 462.1 MB
Notification: Performance of NFInst.updateImplicitVariability: time 0.001196/0.3754, allocations: 39.75 kB / 0.6249 GB, free: 1.891 MB / 462.1 MB
Notification: Performance of NFTyping.typeComponents: time 0.001096/0.3766, allocations: 341.7 kB / 0.6252 GB, free: 1.555 MB / 462.1 MB
Notification: Performance of NFTyping.typeBindings: time 0.006222/0.3828, allocations: 2.498 MB / 0.6276 GB, free: 15.05 MB / 478.1 MB
Notification: Performance of NFTyping.typeClassSections: time 0.002345/0.3852, allocations: 0.9336 MB / 0.6286 GB, free: 14.13 MB / 478.1 MB
Notification: Performance of NFFlatten.flatten: time 0.002887/0.3881, allocations: 2.18 MB / 0.6307 GB, free: 11.95 MB / 478.1 MB
Notification: Performance of NFFlatten.resolveConnections: time 0.0009477/0.389, allocations: 0.645 MB / 0.6313 GB, free: 11.29 MB / 478.1 MB
Notification: Performance of NFEvalConstants.evaluate: time 0.004109/0.3932, allocations: 2.374 MB / 0.6336 GB, free: 8.91 MB / 478.1 MB
Notification: Performance of NFSimplifyModel.simplify: time 0.001008/0.3942, allocations: 0.5561 MB / 0.6342 GB, free: 8.352 MB / 478.1 MB
Notification: Performance of NFPackage.collectConstants: time 0.0001602/0.3943, allocations: 60 kB / 0.6342 GB, free: 8.293 MB / 478.1 MB
Notification: Performance of NFFlatten.collectFunctions: time 0.005352/0.3997, allocations: 3.194 MB / 0.6374 GB, free: 5.094 MB / 478.1 MB
Notification: Performance of NFScalarize.scalarize: time 0.0002587/0.4, allocations: 183.4 kB / 0.6375 GB, free: 4.914 MB / 478.1 MB
Notification: Performance of NFVerifyModel.verify: time 0.0005368/0.4005, allocations: 394 kB / 0.6379 GB, free: 4.527 MB / 478.1 MB
Notification: Performance of NFConvertDAE.convert: time 0.003252/0.4038, allocations: 1.835 MB / 0.6397 GB, free: 2.688 MB / 478.1 MB
Notification: Performance of FrontEnd - DAE generated: time 3.727e-06/0.4038, allocations: 0 / 0.6397 GB, free: 2.688 MB / 478.1 MB
Notification: Performance of FrontEnd: time 1.383e-06/0.4038, allocations: 0 / 0.6397 GB, free: 2.688 MB / 478.1 MB
Notification: Performance of Transformations before backend: time 9.117e-06/0.4038, allocations: 0 / 0.6397 GB, free: 2.688 MB / 478.1 MB
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 0.001584/0.4054, allocations: 1.184 MB / 0.6409 GB, free: 1.453 MB / 478.1 MB
Notification: Performance of prepare preOptimizeDAE: time 3.528e-05/0.4055, allocations: 12.03 kB / 0.6409 GB, free: 1.441 MB / 478.1 MB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001173/0.4066, allocations: 155.9 kB / 0.641 GB, free: 1.289 MB / 478.1 MB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.00137/0.408, allocations: 0.7946 MB / 0.6418 GB, free: 464 kB / 478.1 MB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.741e-05/0.4081, allocations: 33 kB / 0.6418 GB, free: 432 kB / 478.1 MB
Notification: Performance of preOpt expandDerOperator (simulation): time 7.234e-05/0.4081, allocations: 44 kB / 0.6419 GB, free: 388 kB / 478.1 MB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.0007857/0.4089, allocations: 0.5196 MB / 0.6424 GB, free: 15.82 MB / 494.1 MB
Notification: Performance of preOpt findStateOrder (simulation): time 1.984e-05/0.409, allocations: 3.984 kB / 0.6424 GB, free: 15.82 MB / 494.1 MB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.667e-05/0.409, allocations: 24 kB / 0.6424 GB, free: 15.8 MB / 494.1 MB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.282e-05/0.409, allocations: 8 kB / 0.6424 GB, free: 15.79 MB / 494.1 MB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0005243/0.4096, allocations: 347.6 kB / 0.6427 GB, free: 15.45 MB / 494.1 MB
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 0.002494/0.4121, allocations: 2.447 MB / 0.6451 GB, free: 12.82 MB / 494.1 MB
Notification: Performance of preOpt comSubExp (simulation): time 0.0003873/0.4125, allocations: 272.7 kB / 0.6454 GB, free: 12.55 MB / 494.1 MB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0001948/0.4127, allocations: 139.5 kB / 0.6455 GB, free: 12.41 MB / 494.1 MB
Notification: Performance of preOpt evalFunc (simulation): time 0.0008967/0.4136, allocations: 1.37 MB / 0.6469 GB, free: 10.73 MB / 494.1 MB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.461e-05/0.4136, allocations: 34.56 kB / 0.6469 GB, free: 10.69 MB / 494.1 MB
Notification: Performance of pre-optimization done (n=31): time 1.794e-06/0.4136, allocations: 4 kB / 0.6469 GB, free: 10.68 MB / 494.1 MB
Notification: Performance of matching and sorting (n=43): time 0.004041/0.4177, allocations: 1.797 MB / 0.6486 GB, free: 8.793 MB / 494.1 MB
Notification: Performance of inlineWhenForInitialization (initialization): time 3.678e-05/0.4177, allocations: 59.34 kB / 0.6487 GB, free: 8.723 MB / 494.1 MB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0006088/0.4183, allocations: 0.499 MB / 0.6492 GB, free: 8.215 MB / 494.1 MB
Notification: Performance of collectPreVariables (initialization): time 3.815e-05/0.4184, allocations: 33.7 kB / 0.6492 GB, free: 8.176 MB / 494.1 MB
Notification: Performance of collectInitialEqns (initialization): time 0.0002559/0.4186, allocations: 324.4 kB / 0.6495 GB, free: 7.852 MB / 494.1 MB
Notification: Performance of collectInitialBindings (initialization): time 0.0001452/0.4188, allocations: 149.8 kB / 0.6497 GB, free: 7.703 MB / 494.1 MB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001363/0.4189, allocations: 94.16 kB / 0.6498 GB, free: 7.605 MB / 494.1 MB
Notification: Performance of setup shared object (initialization): time 0.0001778/0.4191, allocations: 374.8 kB / 0.6501 GB, free: 7.23 MB / 494.1 MB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0002357/0.4194, allocations: 147 kB / 0.6503 GB, free: 7.082 MB / 494.1 MB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0003329/0.4197, allocations: 270.7 kB / 0.6505 GB, free: 6.777 MB / 494.1 MB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0005843/0.4203, allocations: 444.8 kB / 0.6509 GB, free: 6.305 MB / 494.1 MB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.418e-06/0.4203, allocations: 4 kB / 0.651 GB, free: 6.301 MB / 494.1 MB
Notification: Performance of matching and sorting (n=57) (initialization): time 0.0009601/0.4213, allocations: 0.6067 MB / 0.6515 GB, free: 5.68 MB / 494.1 MB
Notification: Performance of prepare postOptimizeDAE: time 2.03e-05/0.4213, allocations: 10.34 kB / 0.6516 GB, free: 5.672 MB / 494.1 MB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.375e-06/0.4213, allocations: 4 kB / 0.6516 GB, free: 5.668 MB / 494.1 MB
Notification: Performance of postOpt tearingSystem (initialization): time 0.000711/0.422, allocations: 201.9 kB / 0.6518 GB, free: 5.465 MB / 494.1 MB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000263/0.4223, allocations: 67.91 kB / 0.6518 GB, free: 5.398 MB / 494.1 MB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001037/0.4234, allocations: 1.355 MB / 0.6531 GB, free: 3.992 MB / 494.1 MB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003473/0.4237, allocations: 12 kB / 0.6531 GB, free: 3.98 MB / 494.1 MB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.506e-05/0.4238, allocations: 20 kB / 0.6532 GB, free: 3.961 MB / 494.1 MB
Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0003974/0.4242, allocations: 317.2 kB / 0.6535 GB, free: 3.645 MB / 494.1 MB
Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0002981/0.4245, allocations: 262.6 kB / 0.6537 GB, free: 3.344 MB / 494.1 MB
Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.000545/0.425, allocations: 442.7 kB / 0.6541 GB, free: 2.871 MB / 494.1 MB
Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.833e-06/0.425, allocations: 0 / 0.6541 GB, free: 2.871 MB / 494.1 MB
Notification: Performance of matching and sorting (n=57) (initialization_lambda0): time 0.0009312/0.426, allocations: 0.6031 MB / 0.6547 GB, free: 2.254 MB / 494.1 MB
Notification: Performance of prepare postOptimizeDAE: time 1.006e-05/0.426, allocations: 4 kB / 0.6547 GB, free: 2.25 MB / 494.1 MB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.206e-06/0.426, allocations: 4 kB / 0.6547 GB, free: 2.246 MB / 494.1 MB
Notification: Performance of postOpt tearingSystem (initialization): time 0.0006708/0.4267, allocations: 197.9 kB / 0.6549 GB, free: 2.047 MB / 494.1 MB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002168/0.4269, allocations: 75.84 kB / 0.655 GB, free: 1.973 MB / 494.1 MB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0009354/0.4279, allocations: 1.347 MB / 0.6563 GB, free: 0.5742 MB / 494.1 MB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0003426/0.4282, allocations: 12 kB / 0.6563 GB, free: 0.5625 MB / 494.1 MB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.267e-05/0.4283, allocations: 27.98 kB / 0.6564 GB, free: 0.5352 MB / 494.1 MB
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 0.0001517/0.4284, allocations: 212.1 kB / 0.6566 GB, free: 328 kB / 494.1 MB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001146/0.4285, allocations: 59.25 kB / 0.6566 GB, free: 268 kB / 494.1 MB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.00119/0.4297, allocations: 0.6335 MB / 0.6572 GB, free: 15.62 MB / 0.4981 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.053e-05/0.4298, allocations: 8 kB / 0.6572 GB, free: 15.61 MB / 0.4981 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 6.282e-06/0.4298, allocations: 0 / 0.6572 GB, free: 15.61 MB / 0.4981 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.0009779/0.4308, allocations: 0.6511 MB / 0.6579 GB, free: 14.9 MB / 0.4981 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002191/0.433, allocations: 1.447 MB / 0.6593 GB, free: 13.39 MB / 0.4981 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.762e-06/0.433, allocations: 0 / 0.6593 GB, free: 13.39 MB / 0.4981 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001733/0.4332, allocations: 47.86 kB / 0.6593 GB, free: 13.35 MB / 0.4981 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.0009647/0.4341, allocations: 233.7 kB / 0.6596 GB, free: 13.11 MB / 0.4981 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.371e-05/0.4342, allocations: 15.98 kB / 0.6596 GB, free: 13.1 MB / 0.4981 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001078/0.4353, allocations: 1.327 MB / 0.6609 GB, free: 11.72 MB / 0.4981 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.757e-06/0.4353, allocations: 3.984 kB / 0.6609 GB, free: 11.71 MB / 0.4981 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001398/0.4367, allocations: 0.8747 MB / 0.6617 GB, free: 10.81 MB / 0.4981 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.0002724/0.437, allocations: 188.3 kB / 0.6619 GB, free: 10.61 MB / 0.4981 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 7.709e-05/0.437, allocations: 11.94 kB / 0.6619 GB, free: 10.59 MB / 0.4981 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.000359/0.4374, allocations: 15.98 kB / 0.6619 GB, free: 10.58 MB / 0.4981 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 5.256e-05/0.4375, allocations: 23.97 kB / 0.662 GB, free: 10.55 MB / 0.4981 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.949e-05/0.4375, allocations: 19.98 kB / 0.662 GB, free: 10.54 MB / 0.4981 GB
Notification: Performance of sorting global known variables: time 0.0004318/0.438, allocations: 358.9 kB / 0.6623 GB, free: 10.19 MB / 0.4981 GB
Notification: Performance of sort global known variables: time 4.91e-07/0.438, allocations: 0 / 0.6623 GB, free: 10.19 MB / 0.4981 GB
Notification: Performance of remove unused functions: time 0.001387/0.4394, allocations: 463.8 kB / 0.6628 GB, free: 9.734 MB / 0.4981 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 0.0009741/0.4404, allocations: 448.7 kB / 0.6632 GB, free: 9.297 MB / 0.4981 GB
Notification: Performance of simCode: created initialization part: time 0.001278/0.4416, allocations: 0.6758 MB / 0.6638 GB, free: 8.621 MB / 0.4981 GB
Notification: Performance of simCode: created event and clocks part: time 5.681e-06/0.4417, allocations: 4 kB / 0.6639 GB, free: 8.617 MB / 0.4981 GB
Notification: Performance of simCode: created simulation system equations: time 0.000482/0.4421, allocations: 252.5 kB / 0.6641 GB, free: 8.371 MB / 0.4981 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001336/0.4435, allocations: 324.3 kB / 0.6644 GB, free: 8.074 MB / 0.4981 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.00186/0.4454, allocations: 1.2 MB / 0.6656 GB, free: 6.848 MB / 0.4981 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004522/0.4458, allocations: 0.9222 MB / 0.6665 GB, free: 5.898 MB / 0.4981 GB
Notification: Performance of simCode: alias equations: time 0.0005079/0.4463, allocations: 199.2 kB / 0.6667 GB, free: 5.707 MB / 0.4981 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001467/0.4465, allocations: 63.39 kB / 0.6667 GB, free: 5.645 MB / 0.4981 GB
Notification: Performance of SimCode: time 4.51e-07/0.4465, allocations: 0 / 0.6667 GB, free: 5.645 MB / 0.4981 GB
Notification: Performance of Templates: time 0.02652/0.473, allocations: 16.96 MB / 0.6833 GB, free: 4.887 MB / 0.5137 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 -s gbode -lv LOG_STATS > IDEAS_IDEAS.Fluid.MixingVolumes.Validation.CoupledVolumesGlycol47.pipe 2>&1)