Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_IDEAS.Fluid.FixedResistances.Validation.PressureDropsParallel.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: "" <> buildModelFMU(IDEAS.Fluid.FixedResistances.Validation.PressureDropsParallel,fileNamePrefix="IDEAS_IDEAS_Fluid_FixedResistances_Validation_PressureDropsParallel",fmuType="me",version="2.0",platforms={"static"})
"" <> buildModelFMU(IDEAS.Fluid.FixedResistances.Validation.PressureDropsParallel,fileNamePrefix="IDEAS_IDEAS_Fluid_FixedResistances_Validation_PressureDropsParallel",fmuType="me",version="2.0",platforms={"static"})
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.005084/0.005084, allocations: 104.4 kB / 15.74 MB, free: 5.949 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001111/0.001111, allocations: 192.3 kB / 16.67 MB, free: 5.871 MB / 14.72 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.309/1.309, allocations: 222.9 MB / 240.4 MB, free: 15.09 MB / 206.1 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/package.mo): time 0.755/0.755, allocations: 132.2 MB / 422.7 MB, free: 6.562 MB / 334.1 MB
Notification: Performance of FrontEnd - loaded program: time 0.001944/0.001944, allocations: 72.03 kB / 0.5808 GB, free: 24.1 MB / 446.1 MB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.155/0.157, allocations: 80.21 MB / 0.6592 GB, free: 10.76 MB / 0.4981 GB
Notification: Performance of NFInst.instantiate(IDEAS.Fluid.FixedResistances.Validation.PressureDropsParallel): time 0.01656/0.1736, allocations: 18.96 MB / 0.6777 GB, free: 7.727 MB / 0.5137 GB
Notification: Performance of NFInst.instExpressions: time 0.005787/0.1794, allocations: 5.005 MB / 0.6826 GB, free: 2.707 MB / 0.5137 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.0004522/0.1799, allocations: 19.88 kB / 0.6826 GB, free: 2.688 MB / 0.5137 GB
Notification: Performance of NFTyping.typeComponents: time 0.0006166/0.1805, allocations: 226.4 kB / 0.6828 GB, free: 2.465 MB / 0.5137 GB
Notification: Performance of NFTyping.typeBindings: time 0.001148/0.1817, allocations: 0.5302 MB / 0.6833 GB, free: 1.934 MB / 0.5137 GB
Notification: Performance of NFTyping.typeClassSections: time 0.001337/0.183, allocations: 0.5449 MB / 0.6839 GB, free: 1.398 MB / 0.5137 GB
Notification: Performance of NFFlatten.flatten: time 0.001074/0.1841, allocations: 1.048 MB / 0.6849 GB, free: 352 kB / 0.5137 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.0004102/0.1845, allocations: 338.8 kB / 0.6852 GB, free: 12 kB / 0.5137 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.0007288/0.1853, allocations: 0.498 MB / 0.6857 GB, free: 15.51 MB / 0.5294 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.0003135/0.1856, allocations: 290.7 kB / 0.686 GB, free: 15.23 MB / 0.5294 GB
Notification: Performance of NFPackage.collectConstants: time 4.172e-05/0.1856, allocations: 24 kB / 0.686 GB, free: 15.2 MB / 0.5294 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.0008247/0.1865, allocations: 0.5497 MB / 0.6865 GB, free: 14.65 MB / 0.5294 GB
Notification: Performance of NFScalarize.scalarize: time 8.769e-05/0.1866, allocations: 83.67 kB / 0.6866 GB, free: 14.57 MB / 0.5294 GB
Notification: Performance of NFVerifyModel.verify: time 0.0001647/0.1868, allocations: 198.9 kB / 0.6868 GB, free: 14.38 MB / 0.5294 GB
Notification: Performance of NFConvertDAE.convert: time 0.00072/0.1875, allocations: 0.6201 MB / 0.6874 GB, free: 13.75 MB / 0.5294 GB
Notification: Performance of FrontEnd - DAE generated: time 4.368e-06/0.1875, allocations: 0 / 0.6874 GB, free: 13.75 MB / 0.5294 GB
Notification: Performance of FrontEnd: time 1.293e-06/0.1875, allocations: 0 / 0.6874 GB, free: 13.75 MB / 0.5294 GB
Notification: Performance of Transformations before backend: time 7.545e-06/0.1875, allocations: 4 kB / 0.6874 GB, free: 13.75 MB / 0.5294 GB
Notification: Model statistics after passing the front-end and creating the data structures used by the back-end:
 * Number of equations: 54
 * Number of variables: 54
Notification: Performance of Generate backend data structure: time 0.0009417/0.1885, allocations: 0.7166 MB / 0.6881 GB, free: 12.98 MB / 0.5294 GB
Notification: Performance of prepare preOptimizeDAE: time 3.376e-05/0.1885, allocations: 12.03 kB / 0.6881 GB, free: 12.97 MB / 0.5294 GB
Notification: Performance of preOpt introduceOutputAliases (simulation): time 5.76e-05/0.1886, allocations: 58.72 kB / 0.6882 GB, free: 12.91 MB / 0.5294 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 7.775e-05/0.1887, allocations: 48.41 kB / 0.6882 GB, free: 12.86 MB / 0.5294 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.0005609/0.1892, allocations: 386.7 kB / 0.6886 GB, free: 12.45 MB / 0.5294 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 6.803e-05/0.1893, allocations: 50.14 kB / 0.6886 GB, free: 12.39 MB / 0.5294 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 3.038e-05/0.1893, allocations: 24 kB / 0.6887 GB, free: 12.37 MB / 0.5294 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.000427/0.1898, allocations: 223.2 kB / 0.6889 GB, free: 12.14 MB / 0.5294 GB
Notification: Performance of preOpt findStateOrder (simulation): time 1.107e-05/0.1898, allocations: 0 / 0.6889 GB, free: 12.14 MB / 0.5294 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.409e-05/0.1898, allocations: 8 kB / 0.6889 GB, free: 12.13 MB / 0.5294 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 6.712e-06/0.1898, allocations: 4 kB / 0.6889 GB, free: 12.13 MB / 0.5294 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0003452/0.1902, allocations: 165.6 kB / 0.6891 GB, free: 11.97 MB / 0.5294 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 0.001235/0.1914, allocations: 1.076 MB / 0.6901 GB, free: 10.77 MB / 0.5294 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0002218/0.1917, allocations: 110.5 kB / 0.6902 GB, free: 10.65 MB / 0.5294 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0001369/0.1918, allocations: 72.75 kB / 0.6903 GB, free: 10.57 MB / 0.5294 GB
Notification: Performance of preOpt evalFunc (simulation): time 0.0002563/0.1921, allocations: 336.4 kB / 0.6906 GB, free: 10.17 MB / 0.5294 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.237e-05/0.1921, allocations: 34.56 kB / 0.6906 GB, free: 10.13 MB / 0.5294 GB
Notification: Performance of pre-optimization done (n=10): time 1.042e-06/0.1921, allocations: 0 / 0.6906 GB, free: 10.13 MB / 0.5294 GB
Notification: Performance of matching and sorting (n=10): time 0.0004935/0.1926, allocations: 205.1 kB / 0.6908 GB, free: 9.922 MB / 0.5294 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 3.34e-05/0.1927, allocations: 55.41 kB / 0.6909 GB, free: 9.855 MB / 0.5294 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0002878/0.1929, allocations: 333.7 kB / 0.6912 GB, free: 9.523 MB / 0.5294 GB
Notification: Performance of collectPreVariables (initialization): time 1.92e-05/0.193, allocations: 25.7 kB / 0.6912 GB, free: 9.492 MB / 0.5294 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0001179/0.1931, allocations: 200.1 kB / 0.6914 GB, free: 9.289 MB / 0.5294 GB
Notification: Performance of collectInitialBindings (initialization): time 3.461e-05/0.1931, allocations: 35.53 kB / 0.6914 GB, free: 9.254 MB / 0.5294 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 6.226e-05/0.1932, allocations: 41.61 kB / 0.6915 GB, free: 9.207 MB / 0.5294 GB
Notification: Performance of setup shared object (initialization): time 0.000115/0.1933, allocations: 338.8 kB / 0.6918 GB, free: 8.867 MB / 0.5294 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001332/0.1935, allocations: 56.75 kB / 0.6919 GB, free: 8.809 MB / 0.5294 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0001684/0.1937, allocations: 102 kB / 0.692 GB, free: 8.688 MB / 0.5294 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0002577/0.1939, allocations: 118.6 kB / 0.6921 GB, free: 8.562 MB / 0.5294 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.914e-06/0.1939, allocations: 3.938 kB / 0.6921 GB, free: 8.559 MB / 0.5294 GB
Notification: Performance of matching and sorting (n=11) (initialization): time 0.0003449/0.1943, allocations: 169.3 kB / 0.6922 GB, free: 8.387 MB / 0.5294 GB
Notification: Performance of prepare postOptimizeDAE: time 1.493e-05/0.1943, allocations: 9.562 kB / 0.6922 GB, free: 8.379 MB / 0.5294 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.02e-06/0.1943, allocations: 3.938 kB / 0.6923 GB, free: 8.375 MB / 0.5294 GB
Notification: Performance of postOpt tearingSystem (initialization): time 1.194e-05/0.1943, allocations: 0 / 0.6923 GB, free: 8.375 MB / 0.5294 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001285/0.1945, allocations: 23.98 kB / 0.6923 GB, free: 8.352 MB / 0.5294 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 4.769e-06/0.1945, allocations: 0 / 0.6923 GB, free: 8.352 MB / 0.5294 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0001731/0.1947, allocations: 27.83 kB / 0.6923 GB, free: 8.324 MB / 0.5294 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.028e-05/0.1947, allocations: 7.984 kB / 0.6923 GB, free: 8.316 MB / 0.5294 GB
Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0001863/0.1949, allocations: 156.1 kB / 0.6925 GB, free: 8.16 MB / 0.5294 GB
Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0001473/0.195, allocations: 89.97 kB / 0.6925 GB, free: 8.051 MB / 0.5294 GB
Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0002293/0.1953, allocations: 122.5 kB / 0.6927 GB, free: 7.922 MB / 0.5294 GB
Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 9.11e-07/0.1953, allocations: 4 kB / 0.6927 GB, free: 7.918 MB / 0.5294 GB
Notification: Performance of matching and sorting (n=11) (initialization_lambda0): time 0.0003078/0.1956, allocations: 165.2 kB / 0.6928 GB, free: 7.75 MB / 0.5294 GB
Notification: Performance of prepare postOptimizeDAE: time 8.185e-06/0.1956, allocations: 8 kB / 0.6928 GB, free: 7.742 MB / 0.5294 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.585e-06/0.1956, allocations: 3.984 kB / 0.6928 GB, free: 7.738 MB / 0.5294 GB
Notification: Performance of postOpt tearingSystem (initialization): time 2.916e-06/0.1956, allocations: 3.938 kB / 0.6928 GB, free: 7.734 MB / 0.5294 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001003/0.1957, allocations: 28.3 kB / 0.6929 GB, free: 7.707 MB / 0.5294 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.934e-06/0.1957, allocations: 7.969 kB / 0.6929 GB, free: 7.699 MB / 0.5294 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0001694/0.1959, allocations: 19.98 kB / 0.6929 GB, free: 7.68 MB / 0.5294 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 1.166e-05/0.1959, allocations: 4 kB / 0.6929 GB, free: 7.676 MB / 0.5294 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 3
 * 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 (11):
 * Single equations (assignments): 11
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 0
 * Mixed (continuous/discrete) equation systems: 0
Notification: Performance of prepare postOptimizeDAE: time 8.471e-05/0.196, allocations: 192.2 kB / 0.6931 GB, free: 7.48 MB / 0.5294 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 5.799e-05/0.1961, allocations: 27.62 kB / 0.6931 GB, free: 7.453 MB / 0.5294 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.00042/0.1965, allocations: 219.8 kB / 0.6933 GB, free: 7.234 MB / 0.5294 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 8.215e-06/0.1965, allocations: 8 kB / 0.6933 GB, free: 7.227 MB / 0.5294 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 3.577e-06/0.1965, allocations: 0 / 0.6933 GB, free: 7.227 MB / 0.5294 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.869e-06/0.1966, allocations: 3.984 kB / 0.6933 GB, free: 7.223 MB / 0.5294 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0007803/0.1973, allocations: 0.6256 MB / 0.6939 GB, free: 6.531 MB / 0.5294 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.196e-06/0.1974, allocations: 4 kB / 0.6939 GB, free: 6.527 MB / 0.5294 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 9.083e-05/0.1974, allocations: 24.08 kB / 0.694 GB, free: 6.504 MB / 0.5294 GB
Notification: Performance of postOpt tearingSystem (simulation): time 2.044e-06/0.1975, allocations: 96 / 0.694 GB, free: 6.504 MB / 0.5294 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.076e-05/0.1975, allocations: 4 kB / 0.694 GB, free: 6.5 MB / 0.5294 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 1.673e-06/0.1975, allocations: 0 / 0.694 GB, free: 6.5 MB / 0.5294 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.666e-06/0.1975, allocations: 7.984 kB / 0.694 GB, free: 6.492 MB / 0.5294 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0003827/0.1979, allocations: 323.9 kB / 0.6943 GB, free: 6.152 MB / 0.5294 GB
Notification: Performance of postOpt removeConstants (simulation): time 0.0001117/0.198, allocations: 120.7 kB / 0.6944 GB, free: 6.016 MB / 0.5294 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 3.167e-05/0.198, allocations: 8 kB / 0.6944 GB, free: 6.008 MB / 0.5294 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0002277/0.1983, allocations: 11.98 kB / 0.6944 GB, free: 5.996 MB / 0.5294 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 3.543e-05/0.1983, allocations: 11.98 kB / 0.6944 GB, free: 5.984 MB / 0.5294 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.912e-05/0.1983, allocations: 11.98 kB / 0.6944 GB, free: 5.973 MB / 0.5294 GB
Notification: Performance of sorting global known variables: time 0.0001926/0.1985, allocations: 239.2 kB / 0.6947 GB, free: 5.742 MB / 0.5294 GB
Notification: Performance of sort global known variables: time 2.51e-07/0.1985, allocations: 0 / 0.6947 GB, free: 5.742 MB / 0.5294 GB
Notification: Performance of remove unused functions: time 0.0004858/0.199, allocations: 167.6 kB / 0.6948 GB, free: 5.578 MB / 0.5294 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 4
 * 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 simulation (12):
 * Single equations (assignments): 10
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 2
 * When equations: 0
 * If-equations: 0
 * Equation systems (not torn): 0
 * Torn equation systems: 0
 * Mixed (continuous/discrete) equation systems: 0
Notification: Performance of Backend phase and start with SimCode phase: time 0.00086/0.1999, allocations: 0.9407 MB / 0.6957 GB, free: 4.609 MB / 0.5294 GB
Notification: Performance of simCode: created initialization part: time 0.0004283/0.2003, allocations: 187.7 kB / 0.6959 GB, free: 4.426 MB / 0.5294 GB
Notification: Performance of simCode: created event and clocks part: time 1.553e-06/0.2003, allocations: 0 / 0.6959 GB, free: 4.426 MB / 0.5294 GB
Notification: Performance of simCode: created simulation system equations: time 0.0001533/0.2005, allocations: 76.23 kB / 0.696 GB, free: 4.352 MB / 0.5294 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0007058/0.2012, allocations: 136.3 kB / 0.6961 GB, free: 4.219 MB / 0.5294 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002804/0.204, allocations: 2.664 MB / 0.6987 GB, free: 1.449 MB / 0.5294 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0002976/0.2043, allocations: 0.7912 MB / 0.6995 GB, free: 0.6328 MB / 0.5294 GB
Notification: Performance of simCode: alias equations: time 0.0001804/0.2045, allocations: 72.36 kB / 0.6996 GB, free: 0.5703 MB / 0.5294 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001186/0.2047, allocations: 107.4 kB / 0.6997 GB, free: 476 kB / 0.5294 GB
Notification: Performance of SimCode: time 4.51e-07/0.2047, allocations: 0 / 0.6997 GB, free: 476 kB / 0.5294 GB
Notification: Performance of buildModelFMU: Generate the FMI files: time 0.02773/0.2324, allocations: 9.662 MB / 0.7091 GB, free: 7.043 MB / 0.545 GB
Notification: Performance of buildModelFMU: Generate platform static: time 7.528/7.761, allocations: 15.23 kB / 0.7091 GB, free: 7.035 MB / 0.545 GB
(rm -f IDEAS_IDEAS.Fluid.FixedResistances.Validation.PressureDropsParallel.pipe ; mkfifo IDEAS_IDEAS.Fluid.FixedResistances.Validation.PressureDropsParallel.pipe ; head -c 1048576 < IDEAS_IDEAS.Fluid.FixedResistances.Validation.PressureDropsParallel.pipe >> ../files/IDEAS_IDEAS.Fluid.FixedResistances.Validation.PressureDropsParallel.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator  --tempDir=temp_IDEAS_IDEAS_Fluid_FixedResistances_Validation_PressureDropsParallel_fmu --startTime=0 --stopTime=1 --timeout=50 --tolerance=1e-06 IDEAS_IDEAS_Fluid_FixedResistances_Validation_PressureDropsParallel.fmu > IDEAS_IDEAS.Fluid.FixedResistances.Validation.PressureDropsParallel.pipe 2>&1)