Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_dev_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve.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.Valves.Simplified.Examples.Thermostatic3WayValve,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve") translateModel(IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="IDEAS_dev_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001314/0.001314, allocations: 103.4 kB / 15.33 MB, free: 0.5078 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001363/0.001363, allocations: 195 kB / 16.25 MB, free: 6.621 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.419/1.419, allocations: 222.9 MB / 239.9 MB, free: 4.523 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/package.mo): time 0.952/0.952, allocations: 135.6 MB / 425.6 MB, free: 11.86 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001927/0.001927, allocations: 68.95 kB / 0.5054 GB, free: 5.172 MB / 414.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1682/0.1702, allocations: 81.02 MB / 0.5845 GB, free: 4.297 MB / 494.1 MB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve): time 0.3144/0.4846, allocations: 47.76 MB / 0.6312 GB, free: 26.1 MB / 0.4981 GB Notification: Performance of NFInst.instExpressions: time 0.01544/0.5001, allocations: 13.28 MB / 0.6441 GB, free: 16.66 MB / 0.4981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.003153/0.5033, allocations: 61.88 kB / 0.6442 GB, free: 16.64 MB / 0.4981 GB Notification: Performance of NFTyping.typeComponents: time 0.002645/0.506, allocations: 0.7931 MB / 0.645 GB, free: 16.21 MB / 0.4981 GB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0-master/Fluid/Actuators/Valves/Simplified/Thermostatic3WayValve.mo:34:3-38:63:writable] Warning: Conditional component ‘vol‘ is used in a non-connect context. Notification: Performance of NFTyping.typeBindings: time 0.005184/0.5112, allocations: 1.951 MB / 0.6469 GB, free: 15.1 MB / 0.4981 GB Notification: Performance of NFTyping.typeClassSections: time 0.004136/0.5154, allocations: 1.692 MB / 0.6485 GB, free: 14.19 MB / 0.4981 GB Notification: Performance of NFFlatten.flatten: time 0.005178/0.5206, allocations: 4.142 MB / 0.6526 GB, free: 12.24 MB / 0.4981 GB Notification: Performance of NFFlatten.resolveConnections: time 0.002045/0.5227, allocations: 1.486 MB / 0.654 GB, free: 11.53 MB / 0.4981 GB Notification: Performance of NFEvalConstants.evaluate: time 0.004079/0.5267, allocations: 1.631 MB / 0.6556 GB, free: 10.77 MB / 0.4981 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002119/0.5289, allocations: 1.237 MB / 0.6568 GB, free: 10.21 MB / 0.4981 GB Notification: Performance of NFPackage.collectConstants: time 0.0003689/0.5293, allocations: 149.6 kB / 0.657 GB, free: 10.21 MB / 0.4981 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003474/0.5328, allocations: 1.455 MB / 0.6584 GB, free: 9.797 MB / 0.4981 GB Notification: Performance of NFScalarize.scalarize: time 0.0005349/0.5333, allocations: 455.9 kB / 0.6588 GB, free: 9.555 MB / 0.4981 GB Notification: Performance of NFVerifyModel.verify: time 0.001238/0.5346, allocations: 0.86 MB / 0.6596 GB, free: 9.016 MB / 0.4981 GB Notification: Performance of NFConvertDAE.convert: time 0.005194/0.5398, allocations: 2.935 MB / 0.6625 GB, free: 7.945 MB / 0.4981 GB Notification: Performance of FrontEnd - DAE generated: time 7.855e-06/0.5398, allocations: 5.156 kB / 0.6625 GB, free: 7.941 MB / 0.4981 GB Notification: Performance of FrontEnd: time 2.104e-06/0.5398, allocations: 0 / 0.6625 GB, free: 7.941 MB / 0.4981 GB Notification: Performance of Transformations before backend: time 6.821e-05/0.5399, allocations: 0 / 0.6625 GB, free: 7.941 MB / 0.4981 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 230 * Number of variables: 230 Notification: Performance of Generate backend data structure: time 0.004653/0.5446, allocations: 2.01 MB / 0.6645 GB, free: 6.629 MB / 0.4981 GB Notification: Performance of prepare preOptimizeDAE: time 4.265e-05/0.5446, allocations: 10.56 kB / 0.6645 GB, free: 6.629 MB / 0.4981 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.009406/0.554, allocations: 1.289 MB / 0.6658 GB, free: 6.496 MB / 0.4981 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.003312/0.5574, allocations: 1.417 MB / 0.6671 GB, free: 5.66 MB / 0.4981 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0003461/0.5577, allocations: 136 kB / 0.6673 GB, free: 5.617 MB / 0.4981 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0002245/0.558, allocations: 100.8 kB / 0.6674 GB, free: 5.582 MB / 0.4981 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.005306/0.5633, allocations: 1.597 MB / 0.6689 GB, free: 5.031 MB / 0.4981 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.917e-05/0.5633, allocations: 1.156 kB / 0.6689 GB, free: 5.031 MB / 0.4981 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001179/0.5635, allocations: 37.38 kB / 0.669 GB, free: 5.004 MB / 0.4981 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.205e-05/0.5635, allocations: 21.62 kB / 0.669 GB, free: 5.004 MB / 0.4981 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.007774/0.5713, allocations: 1.795 MB / 0.6707 GB, free: 4.586 MB / 0.4981 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 0.01607/0.5874, allocations: 6.365 MB / 0.6769 GB, free: 0.6367 MB / 0.4981 GB Notification: Performance of preOpt comSubExp (simulation): time 0.007027/0.5944, allocations: 1.414 MB / 0.6783 GB, free: 344 kB / 0.4981 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.003485/0.598, allocations: 0.7036 MB / 0.679 GB, free: 196 kB / 0.4981 GB Notification: Performance of preOpt evalFunc (simulation): time 0.006568/0.6046, allocations: 3.97 MB / 0.6829 GB, free: 12.66 MB / 0.5137 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.469e-05/0.6047, allocations: 43.2 kB / 0.6829 GB, free: 12.61 MB / 0.5137 GB Notification: Performance of preOpt simplifyInStream (simulation): time 0.0006612/0.6053, allocations: 58.38 kB / 0.683 GB, free: 12.57 MB / 0.5137 GB Notification: Performance of pre-optimization done (n=43): time 3.517e-06/0.6053, allocations: 0 / 0.683 GB, free: 12.57 MB / 0.5137 GB Notification: Performance of matching and sorting (n=43): time 0.01059/0.6159, allocations: 2.014 MB / 0.685 GB, free: 12.13 MB / 0.5137 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.512e-05/0.616, allocations: 58.58 kB / 0.685 GB, free: 12.07 MB / 0.5137 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.002224/0.6183, allocations: 1.299 MB / 0.6863 GB, free: 11.49 MB / 0.5137 GB Notification: Performance of collectPreVariables (initialization): time 0.0001538/0.6184, allocations: 36.98 kB / 0.6863 GB, free: 11.45 MB / 0.5137 GB Notification: Performance of collectInitialEqns (initialization): time 0.0006363/0.6191, allocations: 0.69 MB / 0.687 GB, free: 10.84 MB / 0.5137 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002098/0.6193, allocations: 155 kB / 0.6871 GB, free: 10.7 MB / 0.5137 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0003613/0.6197, allocations: 199.8 kB / 0.6873 GB, free: 10.58 MB / 0.5137 GB Notification: Performance of setup shared object (initialization): time 0.0001517/0.6198, allocations: 332.6 kB / 0.6876 GB, free: 10.26 MB / 0.5137 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.003607/0.6234, allocations: 0.7401 MB / 0.6884 GB, free: 9.902 MB / 0.5137 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.003968/0.6274, allocations: 1.083 MB / 0.6894 GB, free: 9.09 MB / 0.5137 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.006735/0.6342, allocations: 1.648 MB / 0.691 GB, free: 8.012 MB / 0.5137 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.118e-05/0.6342, allocations: 3.406 kB / 0.691 GB, free: 8.012 MB / 0.5137 GB Notification: Performance of matching and sorting (n=103) (initialization): time 0.007836/0.642, allocations: 1.868 MB / 0.6929 GB, free: 7.109 MB / 0.5137 GB Notification: Performance of prepare postOptimizeDAE: time 3.238e-05/0.6421, allocations: 8.344 kB / 0.6929 GB, free: 7.109 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.569e-05/0.6421, allocations: 15.31 kB / 0.6929 GB, free: 7.105 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (initialization): time 3.156e-05/0.6422, allocations: 19.52 kB / 0.6929 GB, free: 7.102 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002128/0.6443, allocations: 403.5 kB / 0.6933 GB, free: 6.961 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.872e-05/0.6443, allocations: 23.36 kB / 0.6933 GB, free: 6.953 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002692/0.647, allocations: 305.7 kB / 0.6936 GB, free: 6.82 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001588/0.6472, allocations: 55.97 kB / 0.6937 GB, free: 6.805 MB / 0.5137 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.004005/0.6512, allocations: 1.002 MB / 0.6946 GB, free: 6.266 MB / 0.5137 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.003939/0.6552, allocations: 1.086 MB / 0.6957 GB, free: 5.449 MB / 0.5137 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.006794/0.662, allocations: 1.649 MB / 0.6973 GB, free: 4.371 MB / 0.5137 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.575e-05/0.6621, allocations: 3.594 kB / 0.6973 GB, free: 4.371 MB / 0.5137 GB Notification: Performance of matching and sorting (n=103) (initialization_lambda0): time 0.008027/0.6701, allocations: 1.861 MB / 0.6991 GB, free: 3.477 MB / 0.5137 GB Notification: Performance of prepare postOptimizeDAE: time 2.247e-05/0.6701, allocations: 17.62 kB / 0.6991 GB, free: 3.469 MB / 0.5137 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.635e-05/0.6702, allocations: 10.91 kB / 0.6991 GB, free: 3.469 MB / 0.5137 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.428e-05/0.6702, allocations: 15.97 kB / 0.6992 GB, free: 3.469 MB / 0.5137 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.002108/0.6723, allocations: 399.8 kB / 0.6995 GB, free: 3.332 MB / 0.5137 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.117e-05/0.6723, allocations: 18.91 kB / 0.6996 GB, free: 3.328 MB / 0.5137 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.002825/0.6752, allocations: 308.8 kB / 0.6999 GB, free: 3.188 MB / 0.5137 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0001621/0.6753, allocations: 48.55 kB / 0.6999 GB, free: 3.18 MB / 0.5137 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 49 * 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 (102): * Single equations (assignments): 101 * Array equations: 1 * 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 0.0004142/0.6758, allocations: 244 kB / 0.7001 GB, free: 2.949 MB / 0.5137 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0004022/0.6762, allocations: 136.1 kB / 0.7003 GB, free: 2.875 MB / 0.5137 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.007571/0.6838, allocations: 1.807 MB / 0.702 GB, free: 1.949 MB / 0.5137 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.336e-05/0.6838, allocations: 9.828 kB / 0.702 GB, free: 1.945 MB / 0.5137 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 8.546e-06/0.6838, allocations: 8 kB / 0.702 GB, free: 1.938 MB / 0.5137 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.006536/0.6904, allocations: 1.563 MB / 0.7036 GB, free: 0.8867 MB / 0.5137 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.00987/0.7003, allocations: 3.019 MB / 0.7065 GB, free: 13.77 MB / 0.5294 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.052e-05/0.7003, allocations: 4.031 kB / 0.7065 GB, free: 13.77 MB / 0.5294 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001885/0.7022, allocations: 287.6 kB / 0.7068 GB, free: 13.48 MB / 0.5294 GB Notification: Performance of postOpt tearingSystem (simulation): time 1.039e-05/0.7022, allocations: 4 kB / 0.7068 GB, free: 13.48 MB / 0.5294 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 7.865e-05/0.7023, allocations: 27.86 kB / 0.7068 GB, free: 13.45 MB / 0.5294 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 6.803e-06/0.7023, allocations: 4 kB / 0.7068 GB, free: 13.45 MB / 0.5294 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.485e-06/0.7023, allocations: 0 / 0.7068 GB, free: 13.45 MB / 0.5294 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01064/0.713, allocations: 2.476 MB / 0.7093 GB, free: 10.94 MB / 0.5294 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0009444/0.714, allocations: 327.2 kB / 0.7096 GB, free: 10.6 MB / 0.5294 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002703/0.7142, allocations: 8 kB / 0.7096 GB, free: 10.59 MB / 0.5294 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002118/0.7164, allocations: 239.5 kB / 0.7098 GB, free: 10.36 MB / 0.5294 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001117/0.7165, allocations: 48.31 kB / 0.7098 GB, free: 10.31 MB / 0.5294 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 9.48e-05/0.7166, allocations: 35.97 kB / 0.7099 GB, free: 10.28 MB / 0.5294 GB Notification: Performance of sorting global known variables: time 0.001541/0.7181, allocations: 0.8918 MB / 0.7108 GB, free: 9.387 MB / 0.5294 GB Notification: Performance of sort global known variables: time 2e-07/0.7182, allocations: 4 kB / 0.7108 GB, free: 9.383 MB / 0.5294 GB Notification: Performance of remove unused functions: time 0.002593/0.7208, allocations: 0.7643 MB / 0.7115 GB, free: 8.617 MB / 0.5294 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * Number of states: 3 (thermostatic3WayValve.vol.dynBal.U,thermostatic3WayValve.k_state,T_out.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 (56): * Single equations (assignments): 48 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 8 * 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 0.001316/0.7221, allocations: 0.5027 MB / 0.712 GB, free: 8.129 MB / 0.5294 GB Notification: Performance of simCode: created initialization part: time 0.01133/0.7334, allocations: 2.554 MB / 0.7145 GB, free: 5.578 MB / 0.5294 GB Notification: Performance of simCode: created event and clocks part: time 6.582e-06/0.7335, allocations: 8 kB / 0.7145 GB, free: 5.57 MB / 0.5294 GB Notification: Performance of simCode: created simulation system equations: time 0.003539/0.737, allocations: 0.7637 MB / 0.7152 GB, free: 4.805 MB / 0.5294 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003584/0.7406, allocations: 0.7141 MB / 0.7159 GB, free: 4.141 MB / 0.5294 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.008508/0.7492, allocations: 3.231 MB / 0.7191 GB, free: 0.8594 MB / 0.5294 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0009738/0.7502, allocations: 1.225 MB / 0.7203 GB, free: 15.61 MB / 0.545 GB Notification: Performance of simCode: alias equations: time 0.002476/0.7527, allocations: 420 kB / 0.7207 GB, free: 15.21 MB / 0.545 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0004659/0.7532, allocations: 127.3 kB / 0.7208 GB, free: 15.09 MB / 0.545 GB Notification: Performance of SimCode: time 9.32e-07/0.7532, allocations: 3.938 kB / 0.7208 GB, free: 15.09 MB / 0.545 GB Notification: Performance of Templates: time 0.05236/0.8055, allocations: 29.98 MB / 0.7501 GB, free: 1.508 MB / 0.5606 GB make -j1 -f IDEAS_dev_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve.makefile (rm -f IDEAS_dev_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve.pipe ; mkfifo IDEAS_dev_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve.pipe ; head -c 1048576 < IDEAS_dev_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve.pipe >> ../files/IDEAS_dev_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve.sim & ./IDEAS_dev_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve -abortSlowSimulation -alarm=480 -lv LOG_STATS > IDEAS_dev_IDEAS.Fluid.Actuators.Valves.Simplified.Examples.Thermostatic3WayValve.pipe 2>&1)