Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr BuildingSystems_BuildingSystems.Fluid.Humidifiers.Validation.SprayAirWasher_X.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/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/ModelicaServices 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo", uses=false) Using package NcDataReader2 with version 2.5.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/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) 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 BuildingSystems with version 2.0.0-beta (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo) Running command: translateModel(BuildingSystems.Fluid.Humidifiers.Validation.SprayAirWasher_X,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Fluid.Humidifiers.Validation.SprayAirWasher_X") translateModel(BuildingSystems.Fluid.Humidifiers.Validation.SprayAirWasher_X,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildingSystems_BuildingSystems.Fluid.Humidifiers.Validation.SprayAirWasher_X") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildingSystems 2.0.0-master/package.mo): time 0.8202/0.8202, allocations: 143.4 MB / 159.2 MB, free: 4.91 MB / 122.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001191/0.001191, allocations: 184.5 kB / 191.9 MB, free: 5.746 MB / 154.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.352/1.352, allocations: 222.9 MB / 447.3 MB, free: 5.887 MB / 330.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0009552/0.0009552, allocations: 99.05 kB / 0.517 GB, free: 3.734 MB / 410.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/NcDataReader2 2.5.1-master/package.mo): time 0.001835/0.001835, allocations: 274.3 kB / 0.5973 GB, free: 49.39 MB / 410.7 MB Notification: Performance of FrontEnd - loaded program: time 0.001387/0.001388, allocations: 83.81 kB / 0.6885 GB, free: 3.852 MB / 458.7 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3115/0.3129, allocations: 81.29 MB / 0.7679 GB, free: 27.68 MB / 458.7 MB Notification: Performance of NFInst.instantiate(BuildingSystems.Fluid.Humidifiers.Validation.SprayAirWasher_X): time 0.4542/0.7671, allocations: 178.1 MB / 0.9418 GB, free: 192 kB / 0.5573 GB Notification: Performance of NFInst.instExpressions: time 0.005893/0.773, allocations: 3.796 MB / 0.9455 GB, free: 60 kB / 0.5573 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0008576/0.7739, allocations: 26.53 kB / 0.9455 GB, free: 60 kB / 0.5573 GB Notification: Performance of NFTyping.typeComponents: time 0.001086/0.7751, allocations: 376.2 kB / 0.9459 GB, free: 48 kB / 0.5573 GB Notification: Performance of NFTyping.typeBindings: time 0.002853/0.7779, allocations: 1.173 MB / 0.947 GB, free: 15.98 MB / 0.573 GB Notification: Performance of NFTyping.typeClassSections: time 0.001867/0.7798, allocations: 0.6759 MB / 0.9477 GB, free: 15.96 MB / 0.573 GB Notification: Performance of NFFlatten.flatten: time 0.002725/0.7825, allocations: 1.846 MB / 0.9495 GB, free: 15.95 MB / 0.573 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001076/0.7837, allocations: 421.1 kB / 0.9499 GB, free: 15.91 MB / 0.573 GB Notification: Performance of NFEvalConstants.evaluate: time 0.00342/0.7871, allocations: 0.9056 MB / 0.9508 GB, free: 15.89 MB / 0.573 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0007918/0.7879, allocations: 474.6 kB / 0.9512 GB, free: 15.88 MB / 0.573 GB Notification: Performance of NFPackage.collectConstants: time 7.202e-05/0.788, allocations: 24.31 kB / 0.9513 GB, free: 15.88 MB / 0.573 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002201/0.7902, allocations: 1.327 MB / 0.9526 GB, free: 15.87 MB / 0.573 GB Notification: Performance of NFScalarize.scalarize: time 0.0001844/0.7904, allocations: 183.2 kB / 0.9527 GB, free: 15.86 MB / 0.573 GB Notification: Performance of NFVerifyModel.verify: time 0.0003586/0.7908, allocations: 307.3 kB / 0.953 GB, free: 15.86 MB / 0.573 GB Notification: Performance of NFConvertDAE.convert: time 0.001549/0.7923, allocations: 1.225 MB / 0.9542 GB, free: 15.69 MB / 0.573 GB Notification: Performance of FrontEnd - DAE generated: time 3.707e-06/0.7924, allocations: 0 / 0.9542 GB, free: 15.69 MB / 0.573 GB Notification: Performance of FrontEnd: time 1.052e-06/0.7924, allocations: 0 / 0.9542 GB, free: 15.69 MB / 0.573 GB Notification: Performance of Transformations before backend: time 8.236e-06/0.7924, allocations: 0 / 0.9542 GB, free: 15.69 MB / 0.573 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 97 * Number of variables: 97 Notification: Performance of Generate backend data structure: time 0.001938/0.7943, allocations: 1.049 MB / 0.9553 GB, free: 15.04 MB / 0.573 GB Notification: Performance of prepare preOptimizeDAE: time 3.325e-05/0.7944, allocations: 10.78 kB / 0.9553 GB, free: 15.04 MB / 0.573 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.001191/0.7956, allocations: 217 kB / 0.9555 GB, free: 15 MB / 0.573 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0007479/0.7963, allocations: 0.5386 MB / 0.956 GB, free: 14.71 MB / 0.573 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.574e-05/0.7964, allocations: 36.31 kB / 0.956 GB, free: 14.7 MB / 0.573 GB Notification: Performance of preOpt expandDerOperator (simulation): time 5.767e-05/0.7964, allocations: 39.81 kB / 0.9561 GB, free: 14.7 MB / 0.573 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0009318/0.7974, allocations: 0.533 MB / 0.9566 GB, free: 14.62 MB / 0.573 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.277e-05/0.7974, allocations: 0 / 0.9566 GB, free: 14.62 MB / 0.573 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.132e-05/0.7974, allocations: 16.69 kB / 0.9566 GB, free: 14.62 MB / 0.573 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 2.398e-05/0.7975, allocations: 19.23 kB / 0.9566 GB, free: 14.62 MB / 0.573 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001065/0.7985, allocations: 0.5013 MB / 0.9571 GB, free: 14.61 MB / 0.573 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 0.003013/0.8016, allocations: 2.224 MB / 0.9593 GB, free: 13.36 MB / 0.573 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0007015/0.8023, allocations: 344 kB / 0.9596 GB, free: 13.24 MB / 0.573 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0002037/0.8025, allocations: 144.8 kB / 0.9597 GB, free: 13.23 MB / 0.573 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001285/0.8038, allocations: 0.8443 MB / 0.9606 GB, free: 12.38 MB / 0.573 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0002996/0.8041, allocations: 197.9 kB / 0.9608 GB, free: 12.31 MB / 0.573 GB Notification: Performance of pre-optimization done (n=26): time 2.204e-06/0.8041, allocations: 0 / 0.9608 GB, free: 12.31 MB / 0.573 GB Notification: Performance of matching and sorting (n=26): time 0.0009448/0.8051, allocations: 435.9 kB / 0.9612 GB, free: 12.24 MB / 0.573 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.609e-05/0.8051, allocations: 85.3 kB / 0.9613 GB, free: 12.14 MB / 0.573 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.00084/0.806, allocations: 0.6586 MB / 0.9619 GB, free: 12.01 MB / 0.573 GB Notification: Performance of collectPreVariables (initialization): time 3.413e-05/0.806, allocations: 32.23 kB / 0.9619 GB, free: 11.98 MB / 0.573 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002733/0.8063, allocations: 318.5 kB / 0.9622 GB, free: 11.83 MB / 0.573 GB Notification: Performance of collectInitialBindings (initialization): time 7.894e-05/0.8064, allocations: 99.97 kB / 0.9623 GB, free: 11.77 MB / 0.573 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001413/0.8065, allocations: 79.83 kB / 0.9624 GB, free: 11.75 MB / 0.573 GB Notification: Performance of setup shared object (initialization): time 0.0001665/0.8067, allocations: 374.8 kB / 0.9628 GB, free: 11.43 MB / 0.573 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003601/0.8071, allocations: 140.8 kB / 0.9629 GB, free: 11.42 MB / 0.573 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004388/0.8075, allocations: 274.4 kB / 0.9632 GB, free: 11.26 MB / 0.573 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0005879/0.8081, allocations: 392.7 kB / 0.9635 GB, free: 11.1 MB / 0.573 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.296e-06/0.8081, allocations: 0 / 0.9635 GB, free: 11.1 MB / 0.573 GB Notification: Performance of matching and sorting (n=43) (initialization): time 0.0009869/0.8091, allocations: 471.5 kB / 0.964 GB, free: 11.03 MB / 0.573 GB Notification: Performance of prepare postOptimizeDAE: time 2.453e-05/0.8092, allocations: 7.719 kB / 0.964 GB, free: 11.03 MB / 0.573 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.147e-06/0.8092, allocations: 4.312 kB / 0.964 GB, free: 11.03 MB / 0.573 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.934e-05/0.8092, allocations: 6.844 kB / 0.964 GB, free: 11.03 MB / 0.573 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003994/0.8096, allocations: 91.02 kB / 0.9641 GB, free: 11.03 MB / 0.573 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.319e-05/0.8096, allocations: 7.844 kB / 0.9641 GB, free: 11.03 MB / 0.573 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0007285/0.8104, allocations: 85.56 kB / 0.9642 GB, free: 11 MB / 0.573 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.345e-05/0.8104, allocations: 17.12 kB / 0.9642 GB, free: 11 MB / 0.573 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0006115/0.8111, allocations: 297.3 kB / 0.9645 GB, free: 10.91 MB / 0.573 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0004313/0.8115, allocations: 278.4 kB / 0.9647 GB, free: 10.75 MB / 0.573 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0005476/0.8121, allocations: 383.1 kB / 0.9651 GB, free: 10.6 MB / 0.573 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.084e-06/0.8121, allocations: 0 / 0.9651 GB, free: 10.6 MB / 0.573 GB Notification: Performance of matching and sorting (n=43) (initialization_lambda0): time 0.0009668/0.813, allocations: 475.8 kB / 0.9656 GB, free: 10.53 MB / 0.573 GB Notification: Performance of prepare postOptimizeDAE: time 1.345e-05/0.8131, allocations: 8.578 kB / 0.9656 GB, free: 10.53 MB / 0.573 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.47e-06/0.8131, allocations: 10 kB / 0.9656 GB, free: 10.52 MB / 0.573 GB Notification: Performance of postOpt tearingSystem (initialization): time 8.065e-06/0.8131, allocations: 5.031 kB / 0.9656 GB, free: 10.52 MB / 0.573 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003819/0.8135, allocations: 83.44 kB / 0.9657 GB, free: 10.52 MB / 0.573 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.938e-06/0.8135, allocations: 9.734 kB / 0.9657 GB, free: 10.52 MB / 0.573 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000599/0.8141, allocations: 75.02 kB / 0.9657 GB, free: 10.5 MB / 0.573 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.739e-05/0.8142, allocations: 20.7 kB / 0.9658 GB, free: 10.5 MB / 0.573 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 18 * Number of states: 0 () * Number of discrete variables: 5 ($PRE.XSet.nextTimeEvent,$whenCondition1,XSet.nextTimeEventScaled,$PRE.XSet.nextTimeEventScaled,XSet.nextTimeEvent) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (43): * Single equations (assignments): 43 * 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 0.0001527/0.8143, allocations: 208.7 kB / 0.966 GB, free: 10.32 MB / 0.573 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 8.032e-05/0.8144, allocations: 59.88 kB / 0.966 GB, free: 10.29 MB / 0.573 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0005899/0.815, allocations: 325.2 kB / 0.9663 GB, free: 10.22 MB / 0.573 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.451e-06/0.815, allocations: 3.344 kB / 0.9663 GB, free: 10.22 MB / 0.573 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.943e-06/0.815, allocations: 2.094 kB / 0.9663 GB, free: 10.22 MB / 0.573 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.326e-06/0.815, allocations: 9.094 kB / 0.9663 GB, free: 10.21 MB / 0.573 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001597/0.8166, allocations: 1.094 MB / 0.9674 GB, free: 9.734 MB / 0.573 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.188e-06/0.8167, allocations: 5 kB / 0.9674 GB, free: 9.734 MB / 0.573 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001735/0.8168, allocations: 41.2 kB / 0.9675 GB, free: 9.73 MB / 0.573 GB Notification: Performance of postOpt tearingSystem (simulation): time 5.15e-06/0.8169, allocations: 3.922 kB / 0.9675 GB, free: 9.73 MB / 0.573 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.251e-05/0.8169, allocations: 8.312 kB / 0.9675 GB, free: 9.73 MB / 0.573 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 6.132e-06/0.8169, allocations: 9.016 kB / 0.9675 GB, free: 9.73 MB / 0.573 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.755e-06/0.8169, allocations: 2.75 kB / 0.9675 GB, free: 9.73 MB / 0.573 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001083/0.818, allocations: 1.249 MB / 0.9687 GB, free: 8.879 MB / 0.573 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0002138/0.8182, allocations: 154.5 kB / 0.9688 GB, free: 8.754 MB / 0.573 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 7.001e-05/0.8183, allocations: 9.906 kB / 0.9689 GB, free: 8.754 MB / 0.573 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0003423/0.8186, allocations: 38.09 kB / 0.9689 GB, free: 8.742 MB / 0.573 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 5.509e-05/0.8187, allocations: 18.73 kB / 0.9689 GB, free: 8.742 MB / 0.573 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.161e-05/0.8187, allocations: 17.11 kB / 0.9689 GB, free: 8.742 MB / 0.573 GB Notification: Performance of sorting global known variables: time 0.000648/0.8194, allocations: 477 kB / 0.9694 GB, free: 8.645 MB / 0.573 GB Notification: Performance of sort global known variables: time 6.42e-07/0.8194, allocations: 0 / 0.9694 GB, free: 8.645 MB / 0.573 GB Notification: Performance of remove unused functions: time 0.001024/0.8204, allocations: 276.9 kB / 0.9696 GB, free: 8.617 MB / 0.573 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 11 * Number of states: 0 () * Number of discrete variables: 3 ($whenCondition1,XSet.nextTimeEvent,XSet.nextTimeEventScaled) * Number of discrete states: 2 (XSet.nextTimeEvent,XSet.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (25): * Single equations (assignments): 23 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 2 * 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 0.001041/0.8215, allocations: 0.5073 MB / 0.9701 GB, free: 8.406 MB / 0.573 GB Notification: Performance of simCode: created initialization part: time 0.001064/0.8226, allocations: 0.4983 MB / 0.9706 GB, free: 8.352 MB / 0.573 GB Notification: Performance of simCode: created event and clocks part: time 2.905e-06/0.8226, allocations: 0 / 0.9706 GB, free: 8.352 MB / 0.573 GB Notification: Performance of simCode: created simulation system equations: time 0.000198/0.8228, allocations: 132.2 kB / 0.9708 GB, free: 8.301 MB / 0.573 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001308/0.8241, allocations: 265.4 kB / 0.971 GB, free: 8.176 MB / 0.573 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001807/0.8259, allocations: 1.421 MB / 0.9724 GB, free: 7.121 MB / 0.573 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004499/0.8264, allocations: 0.8915 MB / 0.9733 GB, free: 6.332 MB / 0.573 GB Notification: Performance of simCode: alias equations: time 0.0006655/0.827, allocations: 174.3 kB / 0.9734 GB, free: 6.246 MB / 0.573 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001225/0.8272, allocations: 50.27 kB / 0.9735 GB, free: 6.234 MB / 0.573 GB Notification: Performance of SimCode: time 8.02e-07/0.8272, allocations: 0 / 0.9735 GB, free: 6.234 MB / 0.573 GB Notification: Performance of Templates: time 0.0167/0.8439, allocations: 10.3 MB / 0.9835 GB, free: 1.176 MB / 0.573 GB make -j1 -f BuildingSystems_BuildingSystems.Fluid.Humidifiers.Validation.SprayAirWasher_X.makefile (rm -f BuildingSystems_BuildingSystems.Fluid.Humidifiers.Validation.SprayAirWasher_X.pipe ; mkfifo BuildingSystems_BuildingSystems.Fluid.Humidifiers.Validation.SprayAirWasher_X.pipe ; head -c 1048576 < BuildingSystems_BuildingSystems.Fluid.Humidifiers.Validation.SprayAirWasher_X.pipe >> ../files/BuildingSystems_BuildingSystems.Fluid.Humidifiers.Validation.SprayAirWasher_X.sim & ./BuildingSystems_BuildingSystems.Fluid.Humidifiers.Validation.SprayAirWasher_X -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildingSystems_BuildingSystems.Fluid.Humidifiers.Validation.SprayAirWasher_X.pipe 2>&1)