Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.8.0.x_Buildings.Fluid.Movers.Validation.FlowControlled_dp.conf.json
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/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 8.0.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/package.mo)
Running command: "" <> buildModelFMU(Buildings.Fluid.Movers.Validation.FlowControlled_dp,fileNamePrefix="Buildings_maint_8_0_x_Buildings_Fluid_Movers_Validation_FlowControlled_dp",fmuType="me",version="2.0",platforms={"static"})
"" <> buildModelFMU(Buildings.Fluid.Movers.Validation.FlowControlled_dp,fileNamePrefix="Buildings_maint_8_0_x_Buildings_Fluid_Movers_Validation_FlowControlled_dp",fmuType="me",version="2.0",platforms={"static"})
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/package.mo): time 1.746/1.746, allocations: 288.2 MB / 303.2 MB, free: 8.137 MB / 234.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.001206/0.001206, allocations: 179.7 kB / 371.8 MB, free: 10.28 MB / 298.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.824/1.824, allocations: 205.4 MB / 0.6305 GB, free: 10.02 MB / 458.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.001134/0.001134, allocations: 98.84 kB / 0.7439 GB, free: 5.949 MB / 0.5573 GB
Notification: Performance of FrontEnd - loaded program: time 0.000402/0.000402, allocations: 11.16 kB / 0.8668 GB, free: 142 MB / 0.6198 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.254/0.2544, allocations: 115.3 MB / 0.9795 GB, free: 27.62 MB / 0.6198 GB
Notification: Performance of NFInst.instantiate(Buildings.Fluid.Movers.Validation.FlowControlled_dp): time 0.9204/1.175, allocations: 262.5 MB / 1.236 GB, free: 1.77 MB / 0.7605 GB
Notification: Performance of NFInst.instExpressions: time 0.03475/1.21, allocations: 21.11 MB / 1.256 GB, free: 12.63 MB / 0.7917 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.004348/1.214, allocations: 71.5 kB / 1.256 GB, free: 12.56 MB / 0.7917 GB
Notification: Performance of NFTyping.typeComponents: time 0.005301/1.219, allocations: 1.299 MB / 1.258 GB, free: 11.25 MB / 0.7917 GB
Notification: Performance of NFTyping.typeBindings: time 0.01481/1.234, allocations: 3.793 MB / 1.261 GB, free: 7.453 MB / 0.7917 GB
Notification: Performance of NFTyping.typeClassSections: time 0.0119/1.246, allocations: 3.223 MB / 1.265 GB, free: 4.258 MB / 0.7917 GB
Notification: Performance of NFFlatten.flatten: time 0.009102/1.255, allocations: 3.427 MB / 1.268 GB, free: 0.8281 MB / 0.7917 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.0041/1.259, allocations: 1.619 MB / 1.27 GB, free: 15.18 MB / 0.8073 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.007166/1.267, allocations: 2.243 MB / 1.272 GB, free: 12.93 MB / 0.8073 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.003237/1.27, allocations: 1.136 MB / 1.273 GB, free: 11.79 MB / 0.8073 GB
Notification: Performance of NFPackage.collectConstants: time 0.000685/1.271, allocations: 92 kB / 1.273 GB, free: 11.7 MB / 0.8073 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.006448/1.277, allocations: 1.86 MB / 1.275 GB, free: 9.84 MB / 0.8073 GB
Notification: Performance of NFScalarize.scalarize: time 0.001686/1.279, allocations: 0.6776 MB / 1.275 GB, free: 9.16 MB / 0.8073 GB
Notification: Performance of NFVerifyModel.verify: time 0.001708/1.281, allocations: 0.5122 MB / 1.276 GB, free: 8.641 MB / 0.8073 GB
Notification: Performance of NFConvertDAE.convert: time 0.006588/1.287, allocations: 3.145 MB / 1.279 GB, free: 5.488 MB / 0.8073 GB
Notification: Performance of FrontEnd - DAE generated: time 5.029e-06/1.287, allocations: 0 / 1.279 GB, free: 5.488 MB / 0.8073 GB
Notification: Performance of FrontEnd: time 2.735e-06/1.287, allocations: 4 kB / 1.279 GB, free: 5.484 MB / 0.8073 GB
Notification: Performance of Transformations before backend: time 8.674e-05/1.287, allocations: 0 / 1.279 GB, free: 5.484 MB / 0.8073 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 345
 * Number of variables: 345
Notification: Performance of Generate backend data structure: time 0.005639/1.293, allocations: 2.512 MB / 1.281 GB, free: 2.91 MB / 0.8073 GB
Notification: Performance of prepare preOptimizeDAE: time 5.68e-05/1.293, allocations: 12.03 kB / 1.281 GB, free: 2.898 MB / 0.8073 GB
Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0003568/1.293, allocations: 202.6 kB / 1.282 GB, free: 2.691 MB / 0.8073 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.00535/1.299, allocations: 0.8827 MB / 1.282 GB, free: 1.805 MB / 0.8073 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.004034/1.303, allocations: 1.824 MB / 1.284 GB, free: 15.91 MB / 0.823 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0004048/1.303, allocations: 182.6 kB / 1.284 GB, free: 15.73 MB / 0.823 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002321/1.304, allocations: 152 kB / 1.285 GB, free: 15.58 MB / 0.823 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.003402/1.307, allocations: 1.694 MB / 1.286 GB, free: 13.83 MB / 0.823 GB
Notification: Performance of preOpt findStateOrder (simulation): time 3.418e-05/1.307, allocations: 7.938 kB / 1.286 GB, free: 13.82 MB / 0.823 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001392/1.307, allocations: 60 kB / 1.286 GB, free: 13.76 MB / 0.823 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 4.982e-05/1.307, allocations: 46.64 kB / 1.286 GB, free: 13.71 MB / 0.823 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.003467/1.311, allocations: 1.482 MB / 1.288 GB, free: 12.23 MB / 0.823 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 0.01193/1.323, allocations: 7.84 MB / 1.295 GB, free: 3.781 MB / 0.823 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.002506/1.325, allocations: 1.131 MB / 1.297 GB, free: 2.605 MB / 0.823 GB
Notification: Performance of preOpt evalFunc (simulation): time 8.651e-05/1.325, allocations: 20.64 kB / 1.297 GB, free: 2.586 MB / 0.823 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.786e-05/1.325, allocations: 43.22 kB / 1.297 GB, free: 2.535 MB / 0.823 GB
Notification: Performance of preOpt simplifyInStream (simulation): time 0.001142/1.326, allocations: 139.1 kB / 1.297 GB, free: 2.398 MB / 0.823 GB
Notification: Performance of pre-optimization done (n=77): time 4.148e-06/1.326, allocations: 0 / 1.297 GB, free: 2.398 MB / 0.823 GB
Notification: Performance of matching and sorting (n=77): time 0.00503/1.331, allocations: 1.7 MB / 1.298 GB, free: 0.668 MB / 0.823 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 4.474e-05/1.332, allocations: 60.02 kB / 1.298 GB, free: 0.5977 MB / 0.823 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002512/1.334, allocations: 1.785 MB / 1.3 GB, free: 14.78 MB / 0.8386 GB
Notification: Performance of collectPreVariables (initialization): time 0.0001583/1.334, allocations: 41.7 kB / 1.3 GB, free: 14.73 MB / 0.8386 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0008424/1.335, allocations: 0.984 MB / 1.301 GB, free: 13.73 MB / 0.8386 GB
Notification: Performance of collectInitialBindings (initialization): time 0.0002783/1.335, allocations: 268.1 kB / 1.301 GB, free: 13.47 MB / 0.8386 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 5.841e-05/1.335, allocations: 20 kB / 1.301 GB, free: 13.45 MB / 0.8386 GB
Notification: Performance of setup shared object (initialization): time 0.0001413/1.336, allocations: 341.9 kB / 1.302 GB, free: 13.11 MB / 0.8386 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.001242/1.337, allocations: 470 kB / 1.302 GB, free: 12.65 MB / 0.8386 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.001457/1.338, allocations: 0.8857 MB / 1.303 GB, free: 11.57 MB / 0.8386 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.001303/1.34, allocations: 0.5494 MB / 1.304 GB, free: 11.03 MB / 0.8386 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 7.174e-06/1.34, allocations: 0 / 1.304 GB, free: 11.03 MB / 0.8386 GB
Notification: Performance of matching and sorting (n=127) (initialization): time 0.003841/1.344, allocations: 1.531 MB / 1.305 GB, free: 9.48 MB / 0.8386 GB
Notification: Performance of prepare postOptimizeDAE: time 0.001694/1.345, allocations: 3.954 MB / 1.309 GB, free: 5.102 MB / 0.8386 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.319e-05/1.345, allocations: 12 kB / 1.309 GB, free: 5.09 MB / 0.8386 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.0004156/1.346, allocations: 84.8 kB / 1.309 GB, free: 5.004 MB / 0.8386 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001558/1.347, allocations: 311.5 kB / 1.309 GB, free: 4.699 MB / 0.8386 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001244/1.349, allocations: 1.775 MB / 1.311 GB, free: 2.852 MB / 0.8386 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002504/1.351, allocations: 177.2 kB / 1.311 GB, free: 2.68 MB / 0.8386 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001348/1.351, allocations: 59.97 kB / 1.311 GB, free: 2.621 MB / 0.8386 GB
Notification: Performance of prepare postOptimizeDAE: time 1.493e-05/1.351, allocations: 4 kB / 1.311 GB, free: 2.617 MB / 0.8386 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.002529/1.354, allocations: 1.188 MB / 1.313 GB, free: 1.426 MB / 0.8386 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.606e-05/1.354, allocations: 11.98 kB / 1.313 GB, free: 1.414 MB / 0.8386 GB
Notification: Performance of postOpt tearingSystem (initialization): time 0.0001867/1.354, allocations: 56.83 kB / 1.313 GB, free: 1.355 MB / 0.8386 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000972/1.355, allocations: 259.9 kB / 1.313 GB, free: 1.102 MB / 0.8386 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00167/1.357, allocations: 1.514 MB / 1.314 GB, free: 15.46 MB / 0.8542 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002061/1.359, allocations: 160 kB / 1.314 GB, free: 15.3 MB / 0.8542 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 9.715e-05/1.359, allocations: 51.98 kB / 1.315 GB, free: 15.25 MB / 0.8542 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 43
 * 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 (121):
 * Single equations (assignments): 116
 * Array equations: 2
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 2
 * 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: 2 {1,1}
 * Without analytic Jacobian: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 0
 * Non-linear torn systems: 1 {1 4}
Notification: Performance of prepare postOptimizeDAE: time 0.001322/1.36, allocations: 0.588 MB / 1.315 GB, free: 14.66 MB / 0.8542 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0003946/1.361, allocations: 197.7 kB / 1.315 GB, free: 14.46 MB / 0.8542 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003081/1.364, allocations: 1.225 MB / 1.316 GB, free: 13.22 MB / 0.8542 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.047e-05/1.364, allocations: 12 kB / 1.317 GB, free: 13.21 MB / 0.8542 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 4.759e-06/1.364, allocations: 0 / 1.317 GB, free: 13.21 MB / 0.8542 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.002378/1.366, allocations: 1.043 MB / 1.318 GB, free: 12.13 MB / 0.8542 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 0.006587/1.373, allocations: 3.02 MB / 1.32 GB, free: 9.004 MB / 0.8542 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 8.686e-06/1.373, allocations: 0 / 1.32 GB, free: 9.004 MB / 0.8542 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001157/1.374, allocations: 239.9 kB / 1.321 GB, free: 8.77 MB / 0.8542 GB
Notification: Performance of postOpt tearingSystem (simulation): time 0.0001348/1.374, allocations: 44.77 kB / 1.321 GB, free: 8.723 MB / 0.8542 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 6.997e-05/1.374, allocations: 23.97 kB / 1.321 GB, free: 8.699 MB / 0.8542 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0009269/1.375, allocations: 1.752 MB / 1.322 GB, free: 6.875 MB / 0.8542 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.948e-06/1.375, allocations: 4.031 kB / 1.322 GB, free: 6.871 MB / 0.8542 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.004314/1.379, allocations: 1.917 MB / 1.324 GB, free: 4.887 MB / 0.8542 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.001181/1.381, allocations: 366.5 kB / 1.325 GB, free: 4.508 MB / 0.8542 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002675/1.381, allocations: 16 kB / 1.325 GB, free: 4.492 MB / 0.8542 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001417/1.382, allocations: 159.8 kB / 1.325 GB, free: 4.336 MB / 0.8542 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001172/1.382, allocations: 60.48 kB / 1.325 GB, free: 4.277 MB / 0.8542 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 7.912e-05/1.383, allocations: 35.97 kB / 1.325 GB, free: 4.242 MB / 0.8542 GB
Notification: Performance of sorting global known variables: time 0.002012/1.385, allocations: 1.208 MB / 1.326 GB, free: 3.016 MB / 0.8542 GB
Notification: Performance of sort global known variables: time 3.6e-07/1.385, allocations: 0 / 1.326 GB, free: 3.016 MB / 0.8542 GB
Notification: Performance of remove unused functions: time 0.003451/1.388, allocations: 1.005 MB / 1.327 GB, free: 2.008 MB / 0.8542 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 6
 * Number of states: 3 (floMacDyn.vol.dynBal.U,floMacDyn.vol.dynBal.m,floMacDyn.vol.dynBal.mXi[1])
 * 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 (75):
 * Single equations (assignments): 72
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (linear and non-linear blocks): 2
 * 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: 2 {1,1}
 * Without analytic Jacobian: 0
Notification: Torn system details for strict tearing set:
 * Linear torn systems: 0
 * Non-linear torn systems: 1 {1 4}
Notification: Performance of Backend phase and start with SimCode phase: time 0.005728/1.394, allocations: 3.012 MB / 1.33 GB, free: 14.93 MB / 0.8698 GB
Notification: Performance of simCode: created initialization part: time 0.005004/1.399, allocations: 1.882 MB / 1.332 GB, free: 13.04 MB / 0.8698 GB
Notification: Performance of simCode: created event and clocks part: time 6.522e-06/1.399, allocations: 4.312 kB / 1.332 GB, free: 13.04 MB / 0.8698 GB
Notification: Performance of simCode: created simulation system equations: time 0.001578/1.4, allocations: 0.527 MB / 1.332 GB, free: 12.51 MB / 0.8698 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.005765/1.406, allocations: 1.059 MB / 1.333 GB, free: 11.46 MB / 0.8698 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.01286/1.419, allocations: 11.85 MB / 1.345 GB, free: 15.35 MB / 0.8855 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001394/1.421, allocations: 1.609 MB / 1.347 GB, free: 13.7 MB / 0.8855 GB
Notification: Performance of simCode: alias equations: time 0.00268/1.423, allocations: 496.9 kB / 1.347 GB, free: 13.21 MB / 0.8855 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001341/1.425, allocations: 0.8429 MB / 1.348 GB, free: 12.37 MB / 0.8855 GB
Notification: Performance of SimCode: time 3.035e-06/1.425, allocations: 0 / 1.348 GB, free: 12.37 MB / 0.8855 GB
Notification: Performance of buildModelFMU: Generate the FMI files: time 0.1025/1.527, allocations: 55.58 MB / 1.402 GB, free: 5.25 MB / 0.9323 GB
Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0002232/1.527, allocations: 266.7 kB / 1.402 GB, free: 4.887 MB / 0.9323 GB
Notification: Performance of buildModelFMU: Generate platform static: time 3.909/5.436, allocations: 0 / 1.402 GB, free: 4.887 MB / 0.9323 GB
(rm -f Buildings_maint.8.0.x_Buildings.Fluid.Movers.Validation.FlowControlled_dp.pipe ; mkfifo Buildings_maint.8.0.x_Buildings.Fluid.Movers.Validation.FlowControlled_dp.pipe ; head -c 1048576 < Buildings_maint.8.0.x_Buildings.Fluid.Movers.Validation.FlowControlled_dp.pipe >> ../files/Buildings_maint.8.0.x_Buildings.Fluid.Movers.Validation.FlowControlled_dp.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator  --tempDir=temp_Buildings_maint_8_0_x_Buildings_Fluid_Movers_Validation_FlowControlled_dp_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 Buildings_maint_8_0_x_Buildings_Fluid_Movers_Validation_FlowControlled_dp.fmu > Buildings_maint.8.0.x_Buildings.Fluid.Movers.Validation.FlowControlled_dp.pipe 2>&1)