Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr IDEAS_IDEAS.Fluid.Interfaces.Examples.HeaterCooler_u.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.Interfaces.Examples.HeaterCooler_u,fileNamePrefix="IDEAS_IDEAS_Fluid_Interfaces_Examples_HeaterCooler_u",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(IDEAS.Fluid.Interfaces.Examples.HeaterCooler_u,fileNamePrefix="IDEAS_IDEAS_Fluid_Interfaces_Examples_HeaterCooler_u",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 0.001764/0.001764, allocations: 108 kB / 15.61 MB, free: 152 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001958/0.001958, allocations: 197 kB / 16.53 MB, free: 6.664 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.373/1.373, allocations: 222.9 MB / 240.2 MB, free: 4.398 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/IDEAS 3.0.0/package.mo): time 0.7458/0.7458, allocations: 132.2 MB / 422.6 MB, free: 1.773 MB / 350.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001372/0.001372, allocations: 64.75 kB / 0.5019 GB, free: 3.762 MB / 366.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.367/0.3684, allocations: 80.2 MB / 0.5802 GB, free: 4.57 MB / 430.1 MB Notification: Performance of NFInst.instantiate(IDEAS.Fluid.Interfaces.Examples.HeaterCooler_u): time 0.5666/0.9351, allocations: 300.3 MB / 0.8735 GB, free: 66.34 MB / 0.6387 GB Notification: Performance of NFInst.instExpressions: time 0.05369/0.9888, allocations: 49.95 MB / 0.9222 GB, free: 58.54 MB / 0.6387 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.008941/0.9978, allocations: 298.6 kB / 0.9225 GB, free: 58.54 MB / 0.6387 GB Notification: Performance of NFTyping.typeComponents: time 0.008994/1.007, allocations: 3.423 MB / 0.9259 GB, free: 56.8 MB / 0.6387 GB Notification: Performance of NFTyping.typeBindings: time 0.02337/1.03, allocations: 9.019 MB / 0.9347 GB, free: 50.81 MB / 0.6387 GB Notification: Performance of NFTyping.typeClassSections: time 0.01418/1.044, allocations: 6.57 MB / 0.9411 GB, free: 46.07 MB / 0.6387 GB Notification: Performance of NFFlatten.flatten: time 0.01888/1.063, allocations: 18.44 MB / 0.9591 GB, free: 28.17 MB / 0.6387 GB Notification: Performance of NFFlatten.resolveConnections: time 0.007281/1.071, allocations: 5.854 MB / 0.9648 GB, free: 22.32 MB / 0.6387 GB Notification: Performance of NFEvalConstants.evaluate: time 0.01375/1.084, allocations: 7.354 MB / 0.972 GB, free: 15.43 MB / 0.6387 GB Notification: Performance of NFSimplifyModel.simplify: time 0.007083/1.092, allocations: 5.077 MB / 0.977 GB, free: 10.75 MB / 0.6387 GB Notification: Performance of NFPackage.collectConstants: time 0.002107/1.094, allocations: 0.5664 MB / 0.9775 GB, free: 10.18 MB / 0.6387 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0107/1.104, allocations: 4.383 MB / 0.9818 GB, free: 6.078 MB / 0.6387 GB Notification: Performance of NFScalarize.scalarize: time 0.002209/1.107, allocations: 1.506 MB / 0.9833 GB, free: 4.602 MB / 0.6387 GB Notification: Performance of NFVerifyModel.verify: time 0.006118/1.113, allocations: 3.742 MB / 0.9869 GB, free: 0.8828 MB / 0.6387 GB Notification: Performance of NFConvertDAE.convert: time 0.0173/1.13, allocations: 10.31 MB / 0.997 GB, free: 7.012 MB / 0.6544 GB Notification: Performance of FrontEnd - DAE generated: time 7.865e-06/1.13, allocations: 4 kB / 0.997 GB, free: 7.008 MB / 0.6544 GB Notification: Performance of FrontEnd: time 1.443e-06/1.13, allocations: 3.938 kB / 0.997 GB, free: 7.004 MB / 0.6544 GB Notification: Performance of Transformations before backend: time 0.0003034/1.13, allocations: 0 / 0.997 GB, free: 7.004 MB / 0.6544 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 1035 * Number of variables: 1035 Notification: Performance of Generate backend data structure: time 0.01417/1.145, allocations: 7.476 MB / 1.004 GB, free: 15.48 MB / 0.67 GB Notification: Performance of prepare preOptimizeDAE: time 4.218e-05/1.145, allocations: 8.031 kB / 1.004 GB, free: 15.47 MB / 0.67 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.001077/1.146, allocations: 0.5357 MB / 1.005 GB, free: 14.93 MB / 0.67 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002563/1.148, allocations: 0.7841 MB / 1.006 GB, free: 14.13 MB / 0.67 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.00917/1.158, allocations: 5.049 MB / 1.011 GB, free: 9.16 MB / 0.67 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.000235/1.158, allocations: 318.8 kB / 1.011 GB, free: 8.848 MB / 0.67 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0007727/1.159, allocations: 438.6 kB / 1.011 GB, free: 8.422 MB / 0.67 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.007681/1.166, allocations: 4.381 MB / 1.016 GB, free: 3.766 MB / 0.67 GB Notification: Performance of preOpt findStateOrder (simulation): time 9.924e-05/1.166, allocations: 19.77 kB / 1.016 GB, free: 3.746 MB / 0.67 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0004118/1.167, allocations: 172 kB / 1.016 GB, free: 3.578 MB / 0.67 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0001073/1.167, allocations: 116 kB / 1.016 GB, free: 3.465 MB / 0.67 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.005394/1.172, allocations: 2.961 MB / 1.019 GB, free: 0.5 MB / 0.67 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 0.02593/1.198, allocations: 25.28 MB / 1.043 GB, free: 5.371 MB / 0.7012 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002993/1.201, allocations: 2.765 MB / 1.046 GB, free: 2.398 MB / 0.7012 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001425/1.203, allocations: 0.9974 MB / 1.047 GB, free: 1.41 MB / 0.7012 GB Notification: Performance of preOpt evalFunc (simulation): time 0.002736/1.205, allocations: 3.903 MB / 1.051 GB, free: 12.66 MB / 0.7169 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 6.053e-05/1.206, allocations: 68.5 kB / 1.051 GB, free: 12.58 MB / 0.7169 GB Notification: Performance of pre-optimization done (n=217): time 4.588e-06/1.206, allocations: 0 / 1.051 GB, free: 12.58 MB / 0.7169 GB Notification: Performance of matching and sorting (n=217): time 0.01052/1.216, allocations: 4.065 MB / 1.055 GB, free: 8.43 MB / 0.7169 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.427e-05/1.216, allocations: 73.41 kB / 1.055 GB, free: 8.348 MB / 0.7169 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.008061/1.224, allocations: 4.306 MB / 1.059 GB, free: 4.062 MB / 0.7169 GB Notification: Performance of collectPreVariables (initialization): time 0.0004226/1.225, allocations: 77.7 kB / 1.059 GB, free: 3.98 MB / 0.7169 GB Notification: Performance of collectInitialEqns (initialization): time 0.002322/1.227, allocations: 2.785 MB / 1.062 GB, free: 1.188 MB / 0.7169 GB Notification: Performance of collectInitialBindings (initialization): time 0.0009792/1.228, allocations: 0.7592 MB / 1.063 GB, free: 444 kB / 0.7169 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.001081/1.229, allocations: 0.5702 MB / 1.063 GB, free: 15.86 MB / 0.7325 GB Notification: Performance of setup shared object (initialization): time 8.616e-05/1.229, allocations: 305.1 kB / 1.064 GB, free: 15.56 MB / 0.7325 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001497/1.231, allocations: 0.8192 MB / 1.064 GB, free: 14.73 MB / 0.7325 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.002296/1.233, allocations: 1.826 MB / 1.066 GB, free: 12.47 MB / 0.7325 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.003723/1.237, allocations: 2.505 MB / 1.069 GB, free: 9.641 MB / 0.7325 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.656e-05/1.237, allocations: 8 kB / 1.069 GB, free: 9.633 MB / 0.7325 GB Notification: Performance of matching and sorting (n=365) (initialization): time 0.008171/1.245, allocations: 3.562 MB / 1.072 GB, free: 6.012 MB / 0.7325 GB Notification: Performance of prepare postOptimizeDAE: time 3.15e-05/1.245, allocations: 17.72 kB / 1.072 GB, free: 5.996 MB / 0.7325 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.741e-05/1.245, allocations: 20 kB / 1.072 GB, free: 5.977 MB / 0.7325 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.00264/1.248, allocations: 0.5939 MB / 1.073 GB, free: 5.379 MB / 0.7325 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001691/1.249, allocations: 0.5499 MB / 1.073 GB, free: 4.828 MB / 0.7325 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.001992/1.251, allocations: 2.681 MB / 1.076 GB, free: 2.043 MB / 0.7325 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003348/1.255, allocations: 345.1 kB / 1.076 GB, free: 1.703 MB / 0.7325 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0002589/1.255, allocations: 136 kB / 1.076 GB, free: 1.57 MB / 0.7325 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.002747/1.258, allocations: 1.573 MB / 1.078 GB, free: 15.99 MB / 0.7481 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.002004/1.26, allocations: 1.794 MB / 1.08 GB, free: 13.76 MB / 0.7481 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.003272/1.263, allocations: 2.463 MB / 1.082 GB, free: 10.97 MB / 0.7481 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.329e-05/1.263, allocations: 12 kB / 1.082 GB, free: 10.96 MB / 0.7481 GB Notification: Performance of matching and sorting (n=365) (initialization_lambda0): time 0.006369/1.269, allocations: 3.294 MB / 1.085 GB, free: 7.602 MB / 0.7481 GB Notification: Performance of prepare postOptimizeDAE: time 2.231e-05/1.27, allocations: 24.05 kB / 1.085 GB, free: 7.578 MB / 0.7481 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 2.449e-05/1.27, allocations: 23.94 kB / 1.085 GB, free: 7.555 MB / 0.7481 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0009618/1.271, allocations: 378.1 kB / 1.086 GB, free: 7.176 MB / 0.7481 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001653/1.272, allocations: 0.5499 MB / 1.086 GB, free: 6.625 MB / 0.7481 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.007581/1.28, allocations: 8.449 MB / 1.094 GB, free: 13.59 MB / 0.7637 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.003599/1.283, allocations: 309.4 kB / 1.095 GB, free: 13.29 MB / 0.7637 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0003329/1.284, allocations: 132 kB / 1.095 GB, free: 13.16 MB / 0.7637 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 97 * 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 (323): * Single equations (assignments): 319 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 4 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 4 systems {(1,12), (1,9), (1,12), (1,9)} Notification: Performance of prepare postOptimizeDAE: time 0.0007019/1.284, allocations: 374.9 kB / 1.095 GB, free: 12.79 MB / 0.7637 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001465/1.286, allocations: 0.5055 MB / 1.096 GB, free: 12.28 MB / 0.7637 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.006805/1.293, allocations: 3.574 MB / 1.099 GB, free: 8.641 MB / 0.7637 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.456e-05/1.293, allocations: 35.97 kB / 1.099 GB, free: 8.605 MB / 0.7637 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.522e-06/1.293, allocations: 0 / 1.099 GB, free: 8.605 MB / 0.7637 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.003615/1.296, allocations: 2.44 MB / 1.102 GB, free: 6.121 MB / 0.7637 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 0.2748/1.571, allocations: 8.247 MB / 1.11 GB, free: 321 MB / 0.7637 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.398e-05/1.571, allocations: 0 / 1.11 GB, free: 321 MB / 0.7637 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001462/1.573, allocations: 364.4 kB / 1.11 GB, free: 321 MB / 0.7637 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0007801/1.573, allocations: 315.1 kB / 1.11 GB, free: 320.9 MB / 0.7637 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.000209/1.574, allocations: 63.14 kB / 1.11 GB, free: 320.9 MB / 0.7637 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.001424/1.575, allocations: 2.494 MB / 1.113 GB, free: 318.9 MB / 0.7637 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.986e-06/1.575, allocations: 1.438 kB / 1.113 GB, free: 318.9 MB / 0.7637 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.008568/1.584, allocations: 4.339 MB / 1.117 GB, free: 317.2 MB / 0.7637 GB Notification: Performance of postOpt removeConstants (simulation): time 0.002419/1.586, allocations: 0.8809 MB / 1.118 GB, free: 317 MB / 0.7637 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.001233/1.587, allocations: 48.06 kB / 1.118 GB, free: 316.9 MB / 0.7637 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.003708/1.591, allocations: 117.9 kB / 1.118 GB, free: 316.9 MB / 0.7637 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0003642/1.592, allocations: 148.8 kB / 1.118 GB, free: 316.9 MB / 0.7637 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0003741/1.592, allocations: 116.9 kB / 1.118 GB, free: 316.9 MB / 0.7637 GB Notification: Performance of sorting global known variables: time 0.006341/1.598, allocations: 2.853 MB / 1.121 GB, free: 315.9 MB / 0.7637 GB Notification: Performance of sort global known variables: time 1.9e-07/1.598, allocations: 0 / 1.121 GB, free: 315.9 MB / 0.7637 GB Notification: Performance of remove unused functions: time 0.009544/1.608, allocations: 3.228 MB / 1.124 GB, free: 315.6 MB / 0.7637 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 4 * Number of states: 10 (hea1.vol.dynBal.U,hea2.vol.dynBal.U,hea3.vol.dynBal.U,hea4.vol.dynBal.U,mix1.dynBal.U,hea5.vol.dynBal.U,hea6.vol.dynBal.U,hea7.vol.dynBal.U,hea8.vol.dynBal.U,mix2.dynBal.U) * 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 (219): * Single equations (assignments): 181 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 34 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 4 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 4 systems {(1,9), (1,7), (1,9), (1,7)} Notification: Performance of Backend phase and start with SimCode phase: time 0.01018/1.618, allocations: 6.149 MB / 1.13 GB, free: 312.9 MB / 0.7637 GB Notification: Performance of simCode: created initialization part: time 0.01065/1.629, allocations: 4.873 MB / 1.135 GB, free: 311 MB / 0.7637 GB Notification: Performance of simCode: created event and clocks part: time 7.494e-06/1.629, allocations: 3.969 kB / 1.135 GB, free: 311 MB / 0.7637 GB Notification: Performance of simCode: created simulation system equations: time 0.001824/1.631, allocations: 1.234 MB / 1.136 GB, free: 310.6 MB / 0.7637 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.01323/1.644, allocations: 2.633 MB / 1.139 GB, free: 310 MB / 0.7637 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.04873/1.693, allocations: 42.73 MB / 1.181 GB, free: 275.2 MB / 0.7637 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.00176/1.694, allocations: 2.87 MB / 1.183 GB, free: 272.3 MB / 0.7637 GB Notification: Performance of simCode: alias equations: time 0.003667/1.698, allocations: 1.152 MB / 1.184 GB, free: 271.2 MB / 0.7637 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001991/1.7, allocations: 2.534 MB / 1.187 GB, free: 268.7 MB / 0.7637 GB Notification: Performance of SimCode: time 6.31e-07/1.7, allocations: 4 kB / 1.187 GB, free: 268.7 MB / 0.7637 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.4879/2.188, allocations: 148.4 MB / 1.332 GB, free: 121.7 MB / 0.7637 GB Notification: Performance of buildModelFMU: Generate platform static: time 17.53/19.72, allocations: 7.797 kB / 1.332 GB, free: 121.6 MB / 0.7637 GB (rm -f IDEAS_IDEAS.Fluid.Interfaces.Examples.HeaterCooler_u.pipe ; mkfifo IDEAS_IDEAS.Fluid.Interfaces.Examples.HeaterCooler_u.pipe ; head -c 1048576 < IDEAS_IDEAS.Fluid.Interfaces.Examples.HeaterCooler_u.pipe >> ../files/IDEAS_IDEAS.Fluid.Interfaces.Examples.HeaterCooler_u.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator --tempDir=temp_IDEAS_IDEAS_Fluid_Interfaces_Examples_HeaterCooler_u_fmu --startTime=0 --stopTime=3600 --timeout=50 --tolerance=1e-06 IDEAS_IDEAS_Fluid_Interfaces_Examples_HeaterCooler_u.fmu > IDEAS_IDEAS.Fluid.Interfaces.Examples.HeaterCooler_u.pipe 2>&1)