Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr IDEAS_dev_IDEAS.Fluid.Actuators.Dampers.Validation.PressureIndependent.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: translateModel(IDEAS.Fluid.Actuators.Dampers.Validation.PressureIndependent,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.Actuators.Dampers.Validation.PressureIndependent")
translateModel(IDEAS.Fluid.Actuators.Dampers.Validation.PressureIndependent,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.Actuators.Dampers.Validation.PressureIndependent")
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001149/0.001149, allocations: 86.88 kB / 15.06 MB, free: 1.09 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001581/0.001581, allocations: 168.7 kB / 15.95 MB, free: 204 kB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.46/1.46, allocations: 223.3 MB / 240 MB, free: 5.434 MB / 190.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 1.027/1.027, allocations: 135.3 MB / 426.4 MB, free: 14.29 MB / 350.1 MB
Notification: Performance of FrontEnd - loaded program: time 0.0003605/0.0003605, allocations: 8 kB / 0.507 GB, free: 5.141 MB / 414.1 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.1798/0.1802, allocations: 82.3 MB / 0.5874 GB, free: 3.016 MB / 494.1 MB
Notification: Performance of NFInst.instantiate(IDEAS.Fluid.Actuators.Dampers.Validation.PressureIndependent): time 0.5943/0.7745, allocations: 167.4 MB / 0.7508 GB, free: 4.41 MB / 0.5606 GB
Notification: Performance of NFInst.instExpressions: time 0.01521/0.7898, allocations: 9.723 MB / 0.7603 GB, free: 11.92 MB / 0.5762 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.001916/0.7918, allocations: 27.81 kB / 0.7603 GB, free: 11.89 MB / 0.5762 GB
Notification: Performance of NFTyping.typeComponents: time 0.001399/0.7932, allocations: 301.8 kB / 0.7606 GB, free: 11.59 MB / 0.5762 GB
Notification: Performance of NFTyping.typeBindings: time 0.004638/0.7978, allocations: 1.018 MB / 0.7616 GB, free: 10.57 MB / 0.5762 GB
Notification: Performance of NFTyping.typeClassSections: time 0.005254/0.8031, allocations: 1.379 MB / 0.763 GB, free: 9.215 MB / 0.5762 GB
Notification: Performance of NFFlatten.flatten: time 0.004554/0.8077, allocations: 2.735 MB / 0.7656 GB, free: 6.469 MB / 0.5762 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.001913/0.8096, allocations: 0.8587 MB / 0.7665 GB, free: 5.598 MB / 0.5762 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.002883/0.8125, allocations: 1.066 MB / 0.7675 GB, free: 4.527 MB / 0.5762 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.001845/0.8144, allocations: 1.164 MB / 0.7687 GB, free: 3.359 MB / 0.5762 GB
Notification: Performance of NFPackage.collectConstants: time 0.0002549/0.8146, allocations: 80 kB / 0.7687 GB, free: 3.281 MB / 0.5762 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.00305/0.8177, allocations: 1.146 MB / 0.7699 GB, free: 2.133 MB / 0.5762 GB
Notification: Performance of NFScalarize.scalarize: time 0.0006123/0.8183, allocations: 498.4 kB / 0.7703 GB, free: 1.645 MB / 0.5762 GB
Notification: Performance of NFVerifyModel.verify: time 0.0004725/0.8188, allocations: 261 kB / 0.7706 GB, free: 1.383 MB / 0.5762 GB
Notification: Performance of NFConvertDAE.convert: time 0.002696/0.8215, allocations: 1.917 MB / 0.7725 GB, free: 15.46 MB / 0.5919 GB
Notification: Performance of FrontEnd - DAE generated: time 7.775e-06/0.8215, allocations: 0 / 0.7725 GB, free: 15.46 MB / 0.5919 GB
Notification: Performance of FrontEnd: time 1.663e-06/0.8215, allocations: 3.938 kB / 0.7725 GB, free: 15.46 MB / 0.5919 GB
Notification: Performance of Transformations before backend: time 2.318e-05/0.8216, allocations: 0 / 0.7725 GB, free: 15.46 MB / 0.5919 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 174
 * Number of variables: 174
Notification: Performance of Generate backend data structure: time 0.004929/0.8265, allocations: 1.936 MB / 0.7744 GB, free: 13.47 MB / 0.5919 GB
Notification: Performance of prepare preOptimizeDAE: time 4.255e-05/0.8266, allocations: 15.97 kB / 0.7744 GB, free: 13.46 MB / 0.5919 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001133/0.8277, allocations: 233.9 kB / 0.7746 GB, free: 13.23 MB / 0.5919 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.002417/0.8301, allocations: 1.345 MB / 0.7759 GB, free: 11.83 MB / 0.5919 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.491e-05/0.8302, allocations: 62 kB / 0.776 GB, free: 11.77 MB / 0.5919 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001648/0.8304, allocations: 88 kB / 0.776 GB, free: 11.68 MB / 0.5919 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.00174/0.8321, allocations: 1.006 MB / 0.777 GB, free: 10.61 MB / 0.5919 GB
Notification: Performance of preOpt findStateOrder (simulation): time 1.908e-05/0.8321, allocations: 7.938 kB / 0.777 GB, free: 10.6 MB / 0.5919 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 6.09e-05/0.8322, allocations: 28 kB / 0.7771 GB, free: 10.57 MB / 0.5919 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.681e-05/0.8322, allocations: 16 kB / 0.7771 GB, free: 10.56 MB / 0.5919 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001752/0.834, allocations: 0.9223 MB / 0.778 GB, free: 9.637 MB / 0.5919 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 0.007197/0.8412, allocations: 4.756 MB / 0.7826 GB, free: 4.656 MB / 0.5919 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.001517/0.8427, allocations: 0.7756 MB / 0.7834 GB, free: 3.871 MB / 0.5919 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0007776/0.8435, allocations: 436.8 kB / 0.7838 GB, free: 3.445 MB / 0.5919 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.0004364/0.844, allocations: 279.7 kB / 0.7841 GB, free: 3.117 MB / 0.5919 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.121e-05/0.844, allocations: 39 kB / 0.7841 GB, free: 3.07 MB / 0.5919 GB
Notification: Performance of pre-optimization done (n=50): time 2.625e-06/0.844, allocations: 0 / 0.7841 GB, free: 3.07 MB / 0.5919 GB
Notification: Performance of matching and sorting (n=50): time 0.004912/0.849, allocations: 1.623 MB / 0.7857 GB, free: 1.418 MB / 0.5919 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 5.881e-05/0.849, allocations: 59.84 kB / 0.7857 GB, free: 1.348 MB / 0.5919 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.003036/0.8521, allocations: 1.828 MB / 0.7875 GB, free: 15.51 MB / 0.6075 GB
Notification: Performance of collectPreVariables (initialization): time 0.0002642/0.8524, allocations: 37.7 kB / 0.7876 GB, free: 15.46 MB / 0.6075 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0005781/0.8529, allocations: 0.5793 MB / 0.7881 GB, free: 14.88 MB / 0.6075 GB
Notification: Performance of collectInitialBindings (initialization): time 0.000199/0.8532, allocations: 177.5 kB / 0.7883 GB, free: 14.7 MB / 0.6075 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 7.708e-05/0.8532, allocations: 12 kB / 0.7883 GB, free: 14.69 MB / 0.6075 GB
Notification: Performance of setup shared object (initialization): time 0.0001456/0.8534, allocations: 349.9 kB / 0.7886 GB, free: 14.34 MB / 0.6075 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.001641/0.855, allocations: 0.9506 MB / 0.7896 GB, free: 13.39 MB / 0.6075 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.002024/0.8571, allocations: 1.318 MB / 0.7909 GB, free: 11.95 MB / 0.6075 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.001545/0.8586, allocations: 0.8574 MB / 0.7917 GB, free: 11.09 MB / 0.6075 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 9.738e-06/0.8587, allocations: 4 kB / 0.7917 GB, free: 11.09 MB / 0.6075 GB
Notification: Performance of matching and sorting (n=121) (initialization): time 0.005232/0.8639, allocations: 2.188 MB / 0.7938 GB, free: 8.883 MB / 0.6075 GB
Notification: Performance of prepare postOptimizeDAE: time 0.0002543/0.8642, allocations: 227.7 kB / 0.7941 GB, free: 8.598 MB / 0.6075 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.542e-05/0.8643, allocations: 7.953 kB / 0.7941 GB, free: 8.59 MB / 0.6075 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.0009576/0.8652, allocations: 153.6 kB / 0.7942 GB, free: 8.438 MB / 0.6075 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001038/0.8663, allocations: 180.6 kB / 0.7944 GB, free: 8.262 MB / 0.6075 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001263/0.8675, allocations: 1.316 MB / 0.7957 GB, free: 6.898 MB / 0.6075 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001964/0.8695, allocations: 234.6 kB / 0.7959 GB, free: 6.668 MB / 0.6075 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001207/0.8696, allocations: 35.98 kB / 0.7959 GB, free: 6.633 MB / 0.6075 GB
Notification: Performance of prepare postOptimizeDAE: time 1.011e-05/0.8697, allocations: 4 kB / 0.7959 GB, free: 6.629 MB / 0.6075 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.00352/0.8732, allocations: 1.969 MB / 0.7979 GB, free: 4.656 MB / 0.6075 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.942e-05/0.8732, allocations: 9.25 kB / 0.7979 GB, free: 4.648 MB / 0.6075 GB
Notification: Performance of postOpt tearingSystem (initialization): time 1.294e-05/0.8733, allocations: 8 kB / 0.7979 GB, free: 4.641 MB / 0.6075 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0009401/0.8742, allocations: 183.8 kB / 0.798 GB, free: 4.461 MB / 0.6075 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.378e-05/0.8742, allocations: 11.94 kB / 0.7981 GB, free: 4.449 MB / 0.6075 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001868/0.8761, allocations: 212.8 kB / 0.7983 GB, free: 4.246 MB / 0.6075 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001113/0.8762, allocations: 36.78 kB / 0.7983 GB, free: 4.211 MB / 0.6075 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 21
 * Number of states: 0 ()
 * Number of discrete variables: 14 (damPreInd.idx_sorted[1],damPreInd.idx_sorted[2],damPreInd.idx_sorted[3],damPreInd.idx_sorted[4],damPreInd.idx_sorted[5],damPreInd.idx_sorted[6],damPreInd.idx_sorted[7],damPreInd.idx_sorted[8],damPreInd.idx_sorted[9],damPreInd.idx_sorted[10],damPreInd.idx_sorted[11],damPreInd.idx_sorted[12],damPreInd.idx_sorted[13],conPID.I.trigger_internal)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (74):
 * Single equations (assignments): 70
 * Array equations: 1
 * Algorithm blocks: 0
 * Record equations: 1
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 1
 * Torn equation systems: 1
 * Mixed (continuous/discrete) equation systems: 0
Notification: Equation system details:
 * Constant Jacobian: 0
 * Linear Jacobian (size,density): 0
 * Non-linear Jacobian: 1 {1}
 * Without analytic Jacobian: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 0
 * Non-linear torn systems: 1 {1 10}
Notification: Performance of prepare postOptimizeDAE: time 0.0007118/0.8769, allocations: 388.8 kB / 0.7987 GB, free: 3.82 MB / 0.6075 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0004343/0.8774, allocations: 134.2 kB / 0.7988 GB, free: 3.688 MB / 0.6075 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.002205/0.8796, allocations: 1.038 MB / 0.7998 GB, free: 2.645 MB / 0.6075 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.786e-06/0.8796, allocations: 8 kB / 0.7998 GB, free: 2.637 MB / 0.6075 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 5.761e-06/0.8796, allocations: 0 / 0.7998 GB, free: 2.637 MB / 0.6075 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.757e-06/0.8796, allocations: 7.984 kB / 0.7998 GB, free: 2.629 MB / 0.6075 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.004079/0.8837, allocations: 2.287 MB / 0.8021 GB, free: 264 kB / 0.6075 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.863e-06/0.8838, allocations: 3.984 kB / 0.8021 GB, free: 260 kB / 0.6075 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005774/0.8843, allocations: 122.6 kB / 0.8022 GB, free: 140 kB / 0.6075 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.000744/0.8851, allocations: 144.5 kB / 0.8023 GB, free: 15.99 MB / 0.6231 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.369e-05/0.8852, allocations: 23.94 kB / 0.8023 GB, free: 15.97 MB / 0.6231 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001073/0.8862, allocations: 1.31 MB / 0.8036 GB, free: 14.61 MB / 0.6231 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.474e-06/0.8863, allocations: 4.094 kB / 0.8036 GB, free: 14.61 MB / 0.6231 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002976/0.8892, allocations: 1.642 MB / 0.8052 GB, free: 12.92 MB / 0.6231 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.000694/0.8899, allocations: 330.9 kB / 0.8055 GB, free: 12.58 MB / 0.6231 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001632/0.8901, allocations: 12 kB / 0.8055 GB, free: 12.57 MB / 0.6231 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0009802/0.8911, allocations: 91.95 kB / 0.8056 GB, free: 12.48 MB / 0.6231 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001128/0.8912, allocations: 40.38 kB / 0.8057 GB, free: 12.44 MB / 0.6231 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 4.268e-05/0.8913, allocations: 23.98 kB / 0.8057 GB, free: 12.41 MB / 0.6231 GB
Notification: Performance of sorting global known variables: time 0.001958/0.8932, allocations: 1.297 MB / 0.807 GB, free: 11.12 MB / 0.6231 GB
Notification: Performance of sort global known variables: time 2e-07/0.8933, allocations: 0 / 0.807 GB, free: 11.12 MB / 0.6231 GB
Notification: Performance of remove unused functions: time 0.002056/0.8953, allocations: 0.6787 MB / 0.8076 GB, free: 10.44 MB / 0.6231 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 8
 * Number of states: 2 (conPID.I.y,conPID.D.x)
 * 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 (44):
 * Single equations (assignments): 42
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 1
 * Torn equation systems: 1
 * Mixed (continuous/discrete) equation systems: 0
Notification: Equation system details:
 * Constant Jacobian: 0
 * Linear Jacobian (size,density): 0
 * Non-linear Jacobian: 1 {1}
 * Without analytic Jacobian: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 0
 * Non-linear torn systems: 1 {1 11}
Notification: Performance of Backend phase and start with SimCode phase: time 0.0009282/0.8963, allocations: 356.7 kB / 0.808 GB, free: 10.09 MB / 0.6231 GB
Notification: Performance of simCode: created initialization part: time 0.005182/0.9014, allocations: 2.778 MB / 0.8107 GB, free: 7.301 MB / 0.6231 GB
Notification: Performance of simCode: created event and clocks part: time 6.883e-06/0.9015, allocations: 0 / 0.8107 GB, free: 7.301 MB / 0.6231 GB
Notification: Performance of simCode: created simulation system equations: time 0.0009598/0.9024, allocations: 467.2 kB / 0.8111 GB, free: 6.848 MB / 0.6231 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002464/0.9049, allocations: 454.5 kB / 0.8116 GB, free: 6.414 MB / 0.6231 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003837/0.9088, allocations: 2.489 MB / 0.814 GB, free: 3.879 MB / 0.6231 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007216/0.9095, allocations: 1.17 MB / 0.8151 GB, free: 2.684 MB / 0.6231 GB
Notification: Performance of simCode: alias equations: time 0.001842/0.9114, allocations: 375.1 kB / 0.8155 GB, free: 2.316 MB / 0.6231 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0004579/0.9118, allocations: 95.39 kB / 0.8156 GB, free: 2.223 MB / 0.6231 GB
Notification: Performance of SimCode: time 9.11e-07/0.9118, allocations: 0 / 0.8156 GB, free: 2.223 MB / 0.6231 GB
Notification: Performance of Templates: time 0.04781/0.9597, allocations: 27.84 MB / 0.8428 GB, free: 6.676 MB / 0.6544 GB
make -j1 -f IDEAS_dev_IDEAS.Fluid.Actuators.Dampers.Validation.PressureIndependent.makefile
(rm -f IDEAS_dev_IDEAS.Fluid.Actuators.Dampers.Validation.PressureIndependent.pipe ; mkfifo IDEAS_dev_IDEAS.Fluid.Actuators.Dampers.Validation.PressureIndependent.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Fluid.Actuators.Dampers.Validation.PressureIndependent.pipe >> ../files/IDEAS_dev_IDEAS.Fluid.Actuators.Dampers.Validation.PressureIndependent.sim & ./IDEAS_dev_IDEAS.Fluid.Actuators.Dampers.Validation.PressureIndependent  -abortSlowSimulation -alarm=480 -lv LOG_STATS > IDEAS_dev_IDEAS.Fluid.Actuators.Dampers.Validation.PressureIndependent.pipe 2>&1)