Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8.0.0_Buildings.Fluid.Movers.Validation.ControlledFlowMachineDynamic.conf.json
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo", uses=false)
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo", uses=false)
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo", uses=false)
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo", uses=false)
Using package ModelicaServices with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo)
Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo)
Using package Complex with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo)
Using package Buildings with version 8.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo)
Running command: translateModel(Buildings.Fluid.Movers.Validation.ControlledFlowMachineDynamic,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8.0.0_Buildings.Fluid.Movers.Validation.ControlledFlowMachineDynamic")
translateModel(Buildings.Fluid.Movers.Validation.ControlledFlowMachineDynamic,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8.0.0_Buildings.Fluid.Movers.Validation.ControlledFlowMachineDynamic")
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo): time 2.903/2.903, allocations: 287.5 MB / 302.4 MB, free: 8.336 MB / 234.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.001388/0.001388, allocations: 181.7 kB / 371 MB, free: 10.87 MB / 298.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 2.171/2.171, allocations: 205.4 MB / 0.6297 GB, free: 10.6 MB / 458.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.0009342/0.0009338, allocations: 88.72 kB / 0.743 GB, free: 6.598 MB / 0.5573 GB
Notification: Performance of FrontEnd - loaded program: time 0.0005137/0.000514, allocations: 13.12 kB / 0.8658 GB, free: 140.7 MB / 0.6198 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.2167/0.2172, allocations: 115.3 MB / 0.9784 GB, free: 28.38 MB / 0.6198 GB
Notification: Performance of NFInst.instantiate(Buildings.Fluid.Movers.Validation.ControlledFlowMachineDynamic): time 1.25/1.468, allocations: 341.5 MB / 1.312 GB, free: 6.227 MB / 0.8386 GB
Notification: Performance of NFInst.instExpressions: time 0.1042/1.572, allocations: 47.35 MB / 1.358 GB, free: 6.781 MB / 0.8855 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.008933/1.581, allocations: 147 kB / 1.358 GB, free: 6.637 MB / 0.8855 GB
Notification: Performance of NFTyping.typeComponents: time 0.01615/1.597, allocations: 2.097 MB / 1.36 GB, free: 4.527 MB / 0.8855 GB
Notification: Performance of NFTyping.typeBindings: time 0.03353/1.631, allocations: 6.647 MB / 1.367 GB, free: 13.86 MB / 0.9011 GB
Notification: Performance of NFTyping.typeClassSections: time 0.02126/1.652, allocations: 4.686 MB / 1.371 GB, free: 9.199 MB / 0.9011 GB
Notification: Performance of NFFlatten.flatten: time 0.02985/1.682, allocations: 15.51 MB / 1.387 GB, free: 9.648 MB / 0.9167 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.01059/1.693, allocations: 3.632 MB / 1.39 GB, free: 5.965 MB / 0.9167 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.02152/1.714, allocations: 5.976 MB / 1.396 GB, free: 15.96 MB / 0.9323 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.01134/1.726, allocations: 4.277 MB / 1.4 GB, free: 11.67 MB / 0.9323 GB
Notification: Performance of NFPackage.collectConstants: time 0.002584/1.728, allocations: 252 kB / 1.4 GB, free: 11.43 MB / 0.9323 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.01745/1.746, allocations: 3.691 MB / 1.404 GB, free: 7.727 MB / 0.9323 GB
Notification: Performance of NFScalarize.scalarize: time 0.005379/1.751, allocations: 2.376 MB / 1.406 GB, free: 5.344 MB / 0.9323 GB
Notification: Performance of NFVerifyModel.verify: time 0.004851/1.756, allocations: 1.424 MB / 1.408 GB, free: 3.91 MB / 0.9323 GB
Notification: Performance of NFConvertDAE.convert: time 0.01975/1.776, allocations: 9.094 MB / 1.417 GB, free: 10.79 MB / 0.948 GB
Notification: Performance of FrontEnd - DAE generated: time 6.232e-06/1.776, allocations: 4 kB / 1.417 GB, free: 10.79 MB / 0.948 GB
Notification: Performance of FrontEnd: time 2.915e-06/1.776, allocations: 0 / 1.417 GB, free: 10.79 MB / 0.948 GB
Notification: Performance of Transformations before backend: time 0.0003763/1.776, allocations: 0 / 1.417 GB, free: 10.79 MB / 0.948 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 817
 * Number of variables: 817
Notification: Performance of Generate backend data structure: time 0.02557/1.802, allocations: 7.296 MB / 1.424 GB, free: 3.395 MB / 0.948 GB
Notification: Performance of prepare preOptimizeDAE: time 4.716e-05/1.802, allocations: 12.03 kB / 1.424 GB, free: 3.383 MB / 0.948 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01724/1.819, allocations: 1.744 MB / 1.425 GB, free: 1.629 MB / 0.948 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.662/2.481, allocations: 6.149 MB / 1.431 GB, free: 345.3 MB / 0.948 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0004607/2.482, allocations: 282.4 kB / 1.432 GB, free: 345.2 MB / 0.948 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.001712/2.483, allocations: 387.9 kB / 1.432 GB, free: 345.1 MB / 0.948 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.01474/2.498, allocations: 4.515 MB / 1.436 GB, free: 343.2 MB / 0.948 GB
Notification: Performance of preOpt findStateOrder (simulation): time 0.0001178/2.498, allocations: 7.594 kB / 1.436 GB, free: 343.2 MB / 0.948 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.000576/2.499, allocations: 136.2 kB / 1.437 GB, free: 343.1 MB / 0.948 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.000191/2.499, allocations: 114.4 kB / 1.437 GB, free: 343.1 MB / 0.948 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.01274/2.512, allocations: 3.273 MB / 1.44 GB, free: 342 MB / 0.948 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 0.04731/2.559, allocations: 18.86 MB / 1.458 GB, free: 329.9 MB / 0.948 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.009956/2.569, allocations: 2.731 MB / 1.461 GB, free: 328.8 MB / 0.948 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.005009/2.574, allocations: 1.505 MB / 1.462 GB, free: 328.3 MB / 0.948 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.0006135/2.575, allocations: 226.5 kB / 1.463 GB, free: 328.1 MB / 0.948 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.005983/2.581, allocations: 1.968 MB / 1.465 GB, free: 327.4 MB / 0.948 GB
Notification: Performance of preOpt simplifyInStream (simulation): time 0.004202/2.585, allocations: 329.6 kB / 1.465 GB, free: 327.3 MB / 0.948 GB
Notification: Performance of pre-optimization done (n=200): time 1.108e-05/2.585, allocations: 0 / 1.465 GB, free: 327.3 MB / 0.948 GB
Notification: Performance of matching and sorting (n=200): time 0.01818/2.603, allocations: 4.393 MB / 1.469 GB, free: 325.2 MB / 0.948 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 0.0001326/2.604, allocations: 357.7 kB / 1.47 GB, free: 324.8 MB / 0.948 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0149/2.619, allocations: 5.929 MB / 1.475 GB, free: 321.7 MB / 0.948 GB
Notification: Performance of collectPreVariables (initialization): time 0.001075/2.62, allocations: 91.23 kB / 1.475 GB, free: 321.7 MB / 0.948 GB
Notification: Performance of collectInitialEqns (initialization): time 0.00413/2.624, allocations: 2.777 MB / 1.478 GB, free: 319.2 MB / 0.948 GB
Notification: Performance of collectInitialBindings (initialization): time 0.001468/2.625, allocations: 0.6957 MB / 1.479 GB, free: 318.6 MB / 0.948 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003946/2.626, allocations: 60.27 kB / 1.479 GB, free: 318.6 MB / 0.948 GB
Notification: Performance of setup shared object (initialization): time 0.0002715/2.626, allocations: 438.3 kB / 1.479 GB, free: 318.2 MB / 0.948 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.004818/2.631, allocations: 1.541 MB / 1.481 GB, free: 317.4 MB / 0.948 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.006187/2.637, allocations: 2.816 MB / 1.484 GB, free: 315.1 MB / 0.948 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.005348/2.642, allocations: 1.897 MB / 1.485 GB, free: 314.1 MB / 0.948 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.757e-05/2.643, allocations: 7.781 kB / 1.485 GB, free: 314.1 MB / 0.948 GB
Notification: Performance of matching and sorting (n=413) (initialization): time 0.01473/2.657, allocations: 4.913 MB / 1.49 GB, free: 311.6 MB / 0.948 GB
Notification: Performance of prepare postOptimizeDAE: time 0.0005633/2.658, allocations: 1.007 MB / 1.491 GB, free: 310.3 MB / 0.948 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.673e-05/2.658, allocations: 43.42 kB / 1.491 GB, free: 310.3 MB / 0.948 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.001388/2.659, allocations: 288.1 kB / 1.491 GB, free: 310.2 MB / 0.948 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.006727/2.666, allocations: 0.7223 MB / 1.492 GB, free: 310 MB / 0.948 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.004344/2.671, allocations: 3.741 MB / 1.496 GB, free: 306.7 MB / 0.948 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.008145/2.679, allocations: 334.2 kB / 1.496 GB, free: 306.6 MB / 0.948 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.001101/2.68, allocations: 231.2 kB / 1.496 GB, free: 306.6 MB / 0.948 GB
Notification: Performance of prepare postOptimizeDAE: time 1.466e-05/2.68, allocations: 3.875 kB / 1.496 GB, free: 306.6 MB / 0.948 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.01294/2.693, allocations: 5.156 MB / 1.501 GB, free: 303 MB / 0.948 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.0001059/2.693, allocations: 36 kB / 1.501 GB, free: 303 MB / 0.948 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.00252/2.696, allocations: 0.6644 MB / 1.502 GB, free: 302.3 MB / 0.948 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.005282/2.701, allocations: 0.69 MB / 1.503 GB, free: 301.7 MB / 0.948 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0154/2.716, allocations: 8.259 MB / 1.511 GB, free: 293.1 MB / 0.948 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.00786/2.724, allocations: 330.7 kB / 1.511 GB, free: 292.8 MB / 0.948 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0009839/2.725, allocations: 208 kB / 1.511 GB, free: 292.6 MB / 0.948 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 133
 * Number of states: 0 ()
 * Number of discrete variables: 5 ($whenCondition1,$PRE.y.T_start,y.T_start,$PRE.y.count,y.count)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (356):
 * Single equations (assignments): 338
 * Array equations: 8
 * Algorithm blocks: 1
 * Record equations: 4
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 3
 * Torn equation systems: 2
 * Mixed (continuous/discrete) equation systems: 0
Notification: Equation system details:
 * Constant Jacobian: 0
 * Linear Jacobian (size,density): 0
 * Non-linear Jacobian: 3 {1,1,1}
 * Without analytic Jacobian: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 0
 * Non-linear torn systems: 2 {1 4,1 4}
Notification: Performance of prepare postOptimizeDAE: time 0.004686/2.73, allocations: 1.591 MB / 1.513 GB, free: 291 MB / 0.948 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001706/2.732, allocations: 0.5514 MB / 1.513 GB, free: 290.4 MB / 0.948 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.009719/2.741, allocations: 3.386 MB / 1.517 GB, free: 287 MB / 0.948 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.994e-05/2.741, allocations: 20 kB / 1.517 GB, free: 287 MB / 0.948 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 6.262e-06/2.741, allocations: 0 / 1.517 GB, free: 287 MB / 0.948 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.007491/2.749, allocations: 2.935 MB / 1.52 GB, free: 284 MB / 0.948 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 postOpt removeSimpleEquations (simulation): time 0.0236/2.773, allocations: 7.985 MB / 1.527 GB, free: 275.9 MB / 0.948 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.211e-05/2.773, allocations: 0 / 1.527 GB, free: 275.9 MB / 0.948 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.004978/2.778, allocations: 0.5502 MB / 1.528 GB, free: 275.4 MB / 0.948 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.0009218/2.779, allocations: 274.4 kB / 1.528 GB, free: 275.1 MB / 0.948 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0003895/2.779, allocations: 63.97 kB / 1.528 GB, free: 275 MB / 0.948 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.002383/2.781, allocations: 3.495 MB / 1.532 GB, free: 271.4 MB / 0.948 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 5.49e-06/2.781, allocations: 4 kB / 1.532 GB, free: 271.4 MB / 0.948 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01299/2.794, allocations: 4.939 MB / 1.537 GB, free: 266.4 MB / 0.948 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.003455/2.798, allocations: 0.8647 MB / 1.537 GB, free: 265.5 MB / 0.948 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.001721/2.8, allocations: 51.98 kB / 1.537 GB, free: 265.5 MB / 0.948 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.006523/2.806, allocations: 319.8 kB / 1.538 GB, free: 265.2 MB / 0.948 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0005019/2.807, allocations: 141.8 kB / 1.538 GB, free: 265 MB / 0.948 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0002904/2.807, allocations: 87.95 kB / 1.538 GB, free: 265 MB / 0.948 GB
Notification: Performance of sorting global known variables: time 0.008866/2.816, allocations: 4.038 MB / 1.542 GB, free: 260.9 MB / 0.948 GB
Notification: Performance of sort global known variables: time 4.31e-07/2.816, allocations: 0 / 1.542 GB, free: 260.9 MB / 0.948 GB
Notification: Performance of remove unused functions: time 0.01176/2.828, allocations: 2.723 MB / 1.545 GB, free: 258.2 MB / 0.948 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 9
 * Number of states: 20 (fan1.vol.dynBal.U,fan1.vol.dynBal.m,fan1.vol.dynBal.mXi[1],fan1.filter.x[1],fan1.filter.x[2],fan3.vol.dynBal.U,fan3.vol.dynBal.m,fan3.vol.dynBal.mXi[1],fan3.filter.x[1],fan3.filter.x[2],fan2.vol.dynBal.U,fan2.vol.dynBal.m,fan2.vol.dynBal.mXi[1],fan2.filter.x[1],fan2.filter.x[2],fan4.vol.dynBal.U,fan4.vol.dynBal.m,fan4.vol.dynBal.mXi[1],fan4.filter.x[1],fan4.filter.x[2])
 * Number of discrete variables: 3 ($whenCondition1,y.T_start,y.count)
 * Number of discrete states: 1 (y.count)
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for simulation (198):
 * Single equations (assignments): 191
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 2
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 3
 * Torn equation systems: 2
 * Mixed (continuous/discrete) equation systems: 0
Notification: Equation system details:
 * Constant Jacobian: 0
 * Linear Jacobian (size,density): 0
 * Non-linear Jacobian: 3 {1,1,1}
 * Without analytic Jacobian: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 0
 * Non-linear torn systems: 2 {1 5,1 5}
Notification: Performance of Backend phase and start with SimCode phase: time 0.002197/2.83, allocations: 0.6443 MB / 1.545 GB, free: 257.7 MB / 0.948 GB
Notification: Performance of simCode: created initialization part: time 0.02083/2.851, allocations: 6.719 MB / 1.552 GB, free: 250.9 MB / 0.948 GB
Notification: Performance of simCode: created event and clocks part: time 1.451e-05/2.851, allocations: 4.438 kB / 1.552 GB, free: 250.9 MB / 0.948 GB
Notification: Performance of simCode: created simulation system equations: time 0.004903/2.856, allocations: 1.433 MB / 1.553 GB, free: 249.4 MB / 0.948 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.02397/2.88, allocations: 3.291 MB / 1.556 GB, free: 246.2 MB / 0.948 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02703/2.907, allocations: 12.72 MB / 1.569 GB, free: 233.4 MB / 0.948 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.005923/2.913, allocations: 3.49 MB / 1.572 GB, free: 229.9 MB / 0.948 GB
Notification: Performance of simCode: alias equations: time 0.0109/2.924, allocations: 1.506 MB / 1.574 GB, free: 228.4 MB / 0.948 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.002206/2.926, allocations: 411.3 kB / 1.574 GB, free: 228 MB / 0.948 GB
Notification: Performance of SimCode: time 1.573e-06/2.926, allocations: 0 / 1.574 GB, free: 228 MB / 0.948 GB
Notification: Performance of Templates: time 0.2887/3.215, allocations: 122.7 MB / 1.694 GB, free: 106 MB / 0.948 GB
make -j1 -f Buildings_8.0.0_Buildings.Fluid.Movers.Validation.ControlledFlowMachineDynamic.makefile
(rm -f Buildings_8.0.0_Buildings.Fluid.Movers.Validation.ControlledFlowMachineDynamic.pipe ; mkfifo Buildings_8.0.0_Buildings.Fluid.Movers.Validation.ControlledFlowMachineDynamic.pipe ; head -c 1048576 < Buildings_8.0.0_Buildings.Fluid.Movers.Validation.ControlledFlowMachineDynamic.pipe >> ../files/Buildings_8.0.0_Buildings.Fluid.Movers.Validation.ControlledFlowMachineDynamic.sim & ./Buildings_8.0.0_Buildings.Fluid.Movers.Validation.ControlledFlowMachineDynamic -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8.0.0_Buildings.Fluid.Movers.Validation.ControlledFlowMachineDynamic.pipe 2>&1)