Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr BuildSysPro_BuildSysPro.IBPSA.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised.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/BuildSysPro 3.6.0/package.mo", uses=false) Using package BuildSysPro with version 3.5.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0/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: translateModel(BuildSysPro.IBPSA.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildSysPro_BuildSysPro.IBPSA.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised") translateModel(BuildSysPro.IBPSA.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="BuildSysPro_BuildSysPro.IBPSA.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001065/0.001065, allocations: 108.7 kB / 16.41 MB, free: 6.027 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001125/0.001125, allocations: 186.2 kB / 17.34 MB, free: 5.633 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.289/1.289, allocations: 222.9 MB / 241 MB, free: 15.15 MB / 206.1 MB [/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0/Building/BuildingEnvelope/HeatTransfer/package.mo:2:1-40:17:writable] Warning: Soil_case_nappe was referenced in the package.order file, but was not found in package.mo, Soil_case_nappe/package.mo or Soil_case_nappe.mo. Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/BuildSysPro 3.6.0/package.mo): time 0.8303/0.8303, allocations: 143.1 MB / 434.3 MB, free: 12.01 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001238/0.001238, allocations: 71.47 kB / 0.5962 GB, free: 12.3 MB / 446.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1639/0.1651, allocations: 82.04 MB / 0.6763 GB, free: 10.35 MB / 0.5137 GB Notification: Performance of NFInst.instantiate(BuildSysPro.IBPSA.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised): time 0.5294/0.6946, allocations: 161.6 MB / 0.8342 GB, free: 7.184 MB / 0.6075 GB Notification: Performance of NFInst.instExpressions: time 0.003594/0.6983, allocations: 1.765 MB / 0.8359 GB, free: 5.758 MB / 0.6075 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0005988/0.6989, allocations: 11.59 kB / 0.8359 GB, free: 5.754 MB / 0.6075 GB Notification: Performance of NFTyping.typeComponents: time 0.0007652/0.6997, allocations: 164 kB / 0.8361 GB, free: 5.617 MB / 0.6075 GB Notification: Performance of NFTyping.typeBindings: time 0.001659/0.7014, allocations: 0.5159 MB / 0.8366 GB, free: 5.227 MB / 0.6075 GB Notification: Performance of NFTyping.typeClassSections: time 0.00133/0.7027, allocations: 399.3 kB / 0.837 GB, free: 4.945 MB / 0.6075 GB Notification: Performance of NFFlatten.flatten: time 0.00292/0.7057, allocations: 2.518 MB / 0.8394 GB, free: 3.551 MB / 0.6075 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001458/0.7071, allocations: 0.9397 MB / 0.8403 GB, free: 3.027 MB / 0.6075 GB Notification: Performance of NFEvalConstants.evaluate: time 0.00202/0.7092, allocations: 1.034 MB / 0.8413 GB, free: 2.48 MB / 0.6075 GB Notification: Performance of NFSimplifyModel.simplify: time 0.001339/0.7105, allocations: 0.7058 MB / 0.842 GB, free: 2.078 MB / 0.6075 GB Notification: Performance of NFPackage.collectConstants: time 0.0002463/0.7108, allocations: 53.62 kB / 0.8421 GB, free: 2.078 MB / 0.6075 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001847/0.7126, allocations: 0.7429 MB / 0.8428 GB, free: 1.68 MB / 0.6075 GB Notification: Performance of NFScalarize.scalarize: time 0.0004537/0.7131, allocations: 308.5 kB / 0.8431 GB, free: 1.473 MB / 0.6075 GB Notification: Performance of NFVerifyModel.verify: time 0.001185/0.7143, allocations: 0.5414 MB / 0.8436 GB, free: 1.145 MB / 0.6075 GB Notification: Performance of NFConvertDAE.convert: time 0.002375/0.7167, allocations: 1.44 MB / 0.845 GB, free: 284 kB / 0.6075 GB Notification: Performance of FrontEnd - DAE generated: time 4.609e-06/0.7167, allocations: 0 / 0.845 GB, free: 284 kB / 0.6075 GB Notification: Performance of FrontEnd: time 1.583e-06/0.7167, allocations: 0 / 0.845 GB, free: 284 kB / 0.6075 GB Notification: Performance of Transformations before backend: time 1.384e-05/0.7167, allocations: 0 / 0.845 GB, free: 284 kB / 0.6075 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 126 * Number of variables: 126 Notification: Performance of Generate backend data structure: time 0.002322/0.7191, allocations: 1.449 MB / 0.8465 GB, free: 15.16 MB / 0.6231 GB Notification: Performance of prepare preOptimizeDAE: time 3.972e-05/0.7191, allocations: 9.562 kB / 0.8465 GB, free: 15.16 MB / 0.6231 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0007633/0.7199, allocations: 189.1 kB / 0.8466 GB, free: 15.07 MB / 0.6231 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001207/0.7211, allocations: 0.8534 MB / 0.8475 GB, free: 14.44 MB / 0.6231 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 3.382e-05/0.7211, allocations: 42.09 kB / 0.8475 GB, free: 14.43 MB / 0.6231 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.364e-05/0.7212, allocations: 59.31 kB / 0.8476 GB, free: 14.39 MB / 0.6231 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001148/0.7224, allocations: 0.8003 MB / 0.8484 GB, free: 13.51 MB / 0.6231 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.69e-05/0.7224, allocations: 4 kB / 0.8484 GB, free: 13.51 MB / 0.6231 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.14e-05/0.7225, allocations: 20 kB / 0.8484 GB, free: 13.49 MB / 0.6231 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.41e-05/0.7225, allocations: 20 kB / 0.8484 GB, free: 13.47 MB / 0.6231 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.000855/0.7234, allocations: 0.5305 MB / 0.8489 GB, free: 12.94 MB / 0.6231 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 0.003929/0.7273, allocations: 4.591 MB / 0.8534 GB, free: 7.961 MB / 0.6231 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0007075/0.728, allocations: 426.3 kB / 0.8538 GB, free: 7.535 MB / 0.6231 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0003829/0.7284, allocations: 247 kB / 0.854 GB, free: 7.293 MB / 0.6231 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0003813/0.7288, allocations: 194.2 kB / 0.8542 GB, free: 7.066 MB / 0.6231 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0005314/0.7293, allocations: 293 kB / 0.8545 GB, free: 6.762 MB / 0.6231 GB Notification: Performance of pre-optimization done (n=31): time 4.508e-06/0.7294, allocations: 3.984 kB / 0.8545 GB, free: 6.758 MB / 0.6231 GB Notification: Performance of matching and sorting (n=31): time 0.001469/0.7308, allocations: 0.6278 MB / 0.8551 GB, free: 6.125 MB / 0.6231 GB Notification: Performance of inlineWhenForInitialization (initialization): time 6.127e-05/0.7309, allocations: 93.02 kB / 0.8552 GB, free: 6.016 MB / 0.6231 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001355/0.7323, allocations: 1.118 MB / 0.8563 GB, free: 4.879 MB / 0.6231 GB Notification: Performance of collectPreVariables (initialization): time 5.183e-05/0.7323, allocations: 33.7 kB / 0.8563 GB, free: 4.84 MB / 0.6231 GB Notification: Performance of collectInitialEqns (initialization): time 0.0004751/0.7328, allocations: 492.1 kB / 0.8568 GB, free: 4.352 MB / 0.6231 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001012/0.7329, allocations: 110.5 kB / 0.8569 GB, free: 4.242 MB / 0.6231 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001537/0.7331, allocations: 110 kB / 0.857 GB, free: 4.129 MB / 0.6231 GB Notification: Performance of setup shared object (initialization): time 0.000127/0.7332, allocations: 325.9 kB / 0.8573 GB, free: 3.805 MB / 0.6231 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.000371/0.7336, allocations: 214.4 kB / 0.8575 GB, free: 3.594 MB / 0.6231 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0006133/0.7342, allocations: 0.5292 MB / 0.858 GB, free: 2.926 MB / 0.6231 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0008655/0.7351, allocations: 0.6227 MB / 0.8587 GB, free: 2.223 MB / 0.6231 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 6.593e-06/0.7351, allocations: 4 kB / 0.8587 GB, free: 2.219 MB / 0.6231 GB Notification: Performance of matching and sorting (n=54) (initialization): time 0.001226/0.7363, allocations: 0.7123 MB / 0.8594 GB, free: 1.492 MB / 0.6231 GB Notification: Performance of prepare postOptimizeDAE: time 3.97e-05/0.7364, allocations: 37.7 kB / 0.8594 GB, free: 1.449 MB / 0.6231 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.046e-05/0.7364, allocations: 4 kB / 0.8594 GB, free: 1.445 MB / 0.6231 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.908e-05/0.7364, allocations: 11.98 kB / 0.8594 GB, free: 1.434 MB / 0.6231 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004272/0.7369, allocations: 108.3 kB / 0.8595 GB, free: 1.328 MB / 0.6231 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.807e-05/0.7369, allocations: 15.94 kB / 0.8595 GB, free: 1.312 MB / 0.6231 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0006709/0.7376, allocations: 67.55 kB / 0.8596 GB, free: 1.246 MB / 0.6231 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 5.163e-05/0.7376, allocations: 27.98 kB / 0.8596 GB, free: 1.219 MB / 0.6231 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0007307/0.7384, allocations: 0.4928 MB / 0.8601 GB, free: 0.7227 MB / 0.6231 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0005063/0.7389, allocations: 489.9 kB / 0.8606 GB, free: 116 kB / 0.6231 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0007351/0.7396, allocations: 0.5608 MB / 0.8611 GB, free: 15.47 MB / 0.6387 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 3.406e-06/0.7397, allocations: 4 kB / 0.8611 GB, free: 15.47 MB / 0.6387 GB Notification: Performance of matching and sorting (n=54) (initialization_lambda0): time 0.001042/0.7407, allocations: 0.6467 MB / 0.8617 GB, free: 14.81 MB / 0.6387 GB Notification: Performance of prepare postOptimizeDAE: time 3.562e-05/0.7408, allocations: 37.69 kB / 0.8618 GB, free: 14.77 MB / 0.6387 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.289e-06/0.7408, allocations: 4 kB / 0.8618 GB, free: 14.76 MB / 0.6387 GB Notification: Performance of postOpt tearingSystem (initialization): time 8.667e-06/0.7408, allocations: 8 kB / 0.8618 GB, free: 14.75 MB / 0.6387 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003672/0.7412, allocations: 107.8 kB / 0.8619 GB, free: 14.65 MB / 0.6387 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.14e-05/0.7412, allocations: 11.94 kB / 0.8619 GB, free: 14.64 MB / 0.6387 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.000708/0.7419, allocations: 72.31 kB / 0.862 GB, free: 14.57 MB / 0.6387 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.466e-05/0.7419, allocations: 31.92 kB / 0.862 GB, free: 14.54 MB / 0.6387 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 24 * Number of states: 0 () * Number of discrete variables: 5 (pulse_p.count,$PRE.pulse_p.count,pulse_p.T_start,$PRE.pulse_p.T_start,$whenCondition1) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (53): * Single equations (assignments): 52 * Array equations: 0 * Algorithm blocks: 1 * 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 0.0002411/0.7422, allocations: 222.4 kB / 0.8622 GB, free: 14.31 MB / 0.6387 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0001228/0.7423, allocations: 98.78 kB / 0.8623 GB, free: 14.21 MB / 0.6387 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0009271/0.7433, allocations: 498.9 kB / 0.8628 GB, free: 13.72 MB / 0.6387 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.911e-06/0.7433, allocations: 8 kB / 0.8628 GB, free: 13.71 MB / 0.6387 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.761e-06/0.7433, allocations: 0 / 0.8628 GB, free: 13.71 MB / 0.6387 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.909e-06/0.7433, allocations: 0 / 0.8628 GB, free: 13.71 MB / 0.6387 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.002004/0.7453, allocations: 1.385 MB / 0.8642 GB, free: 12.25 MB / 0.6387 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.013e-06/0.7453, allocations: 8 kB / 0.8642 GB, free: 12.25 MB / 0.6387 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002461/0.7456, allocations: 63.89 kB / 0.8642 GB, free: 12.18 MB / 0.6387 GB Notification: Performance of postOpt tearingSystem (simulation): time 7.143e-06/0.7456, allocations: 7.938 kB / 0.8642 GB, free: 12.18 MB / 0.6387 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.367e-05/0.7456, allocations: 8 kB / 0.8642 GB, free: 12.17 MB / 0.6387 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 6.923e-06/0.7456, allocations: 7.984 kB / 0.8642 GB, free: 12.16 MB / 0.6387 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.577e-06/0.7456, allocations: 4 kB / 0.8642 GB, free: 12.16 MB / 0.6387 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0008662/0.7465, allocations: 0.603 MB / 0.8648 GB, free: 11.52 MB / 0.6387 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0003472/0.7469, allocations: 211.8 kB / 0.865 GB, free: 11.29 MB / 0.6387 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.00014/0.747, allocations: 11.94 kB / 0.865 GB, free: 11.28 MB / 0.6387 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0004231/0.7474, allocations: 23.97 kB / 0.8651 GB, free: 11.25 MB / 0.6387 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 9.653e-05/0.7476, allocations: 23.97 kB / 0.8651 GB, free: 11.23 MB / 0.6387 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.351e-05/0.7476, allocations: 12 kB / 0.8651 GB, free: 11.22 MB / 0.6387 GB Notification: Performance of sorting global known variables: time 0.001068/0.7487, allocations: 0.7953 MB / 0.8659 GB, free: 10.41 MB / 0.6387 GB Notification: Performance of sort global known variables: time 1.5e-07/0.7487, allocations: 0 / 0.8659 GB, free: 10.41 MB / 0.6387 GB Notification: Performance of remove unused functions: time 0.001223/0.7499, allocations: 403.4 kB / 0.8663 GB, free: 10.02 MB / 0.6387 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 8 * Number of states: 0 () * Number of discrete variables: 3 ($whenCondition1,pulse_p.T_start,pulse_p.count) * Number of discrete states: 1 (pulse_p.count) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (31): * Single equations (assignments): 29 * 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 0.0005029/0.7504, allocations: 180.4 kB / 0.8664 GB, free: 9.852 MB / 0.6387 GB Notification: Performance of simCode: created initialization part: time 0.001462/0.7519, allocations: 0.8203 MB / 0.8672 GB, free: 9.008 MB / 0.6387 GB Notification: Performance of simCode: created event and clocks part: time 4.268e-06/0.7519, allocations: 0 / 0.8672 GB, free: 9.008 MB / 0.6387 GB Notification: Performance of simCode: created simulation system equations: time 0.0003492/0.7523, allocations: 204.8 kB / 0.8674 GB, free: 8.809 MB / 0.6387 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002135/0.7544, allocations: 452.5 kB / 0.8679 GB, free: 8.371 MB / 0.6387 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003078/0.7575, allocations: 1.772 MB / 0.8696 GB, free: 6.535 MB / 0.6387 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0007789/0.7583, allocations: 1.184 MB / 0.8708 GB, free: 5.32 MB / 0.6387 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002429/0.7585, allocations: 79.42 kB / 0.8708 GB, free: 5.242 MB / 0.6387 GB Notification: Performance of SimCode: time 1.122e-06/0.7586, allocations: 4 kB / 0.8708 GB, free: 5.238 MB / 0.6387 GB Notification: Performance of Templates: time 0.02546/0.784, allocations: 16.01 MB / 0.8865 GB, free: 5.344 MB / 0.6544 GB make -j1 -f BuildSysPro_BuildSysPro.IBPSA.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised.makefile (rm -f BuildSysPro_BuildSysPro.IBPSA.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised.pipe ; mkfifo BuildSysPro_BuildSysPro.IBPSA.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised.pipe ; head -c 1048576 < BuildSysPro_BuildSysPro.IBPSA.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised.pipe >> ../files/BuildSysPro_BuildSysPro.IBPSA.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised.sim & ./BuildSysPro_BuildSysPro.IBPSA.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised -abortSlowSimulation -alarm=480 -lv LOG_STATS > BuildSysPro_BuildSysPro.IBPSA.Fluid.Examples.Performance.PressureDrop.SeriesFlowOptimised.pipe 2>&1)