Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.7.0.x_Buildings.Fluid.CHPs.BaseClasses.Validation.WarmUpTemperature.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo", uses=false) Using package ModelicaServices with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo) Using package Modelica with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo) Using package Complex with version 3.2.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo) Using package Buildings with version 7.0.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo) Running command: "" <> buildModelFMU(Buildings.Fluid.CHPs.BaseClasses.Validation.WarmUpTemperature,fileNamePrefix="Buildings_maint_7_0_x_Buildings_Fluid_CHPs_BaseClasses_Validation_WarmUpTemperature",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Fluid.CHPs.BaseClasses.Validation.WarmUpTemperature,fileNamePrefix="Buildings_maint_7_0_x_Buildings_Fluid_CHPs_BaseClasses_Validation_WarmUpTemperature",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 7.0.3-maint.7.0.x/package.mo): time 1.563/1.563, allocations: 251.9 MB / 266.9 MB, free: 11.03 MB / 218.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.00161/0.00161, allocations: 180 kB / 326.5 MB, free: 2.23 MB / 250.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.953/1.953, allocations: 205.4 MB / 0.5775 GB, free: 20.27 MB / 426.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.000916/0.000916, allocations: 84.81 kB / 0.6821 GB, free: 12.88 MB / 0.5105 GB Notification: Performance of FrontEnd - loaded program: time 0.0003637/0.0003638, allocations: 10.34 kB / 0.7963 GB, free: 135.2 MB / 0.6042 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2647/0.2651, allocations: 106.3 MB / 0.9002 GB, free: 63.84 MB / 0.6042 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.CHPs.BaseClasses.Validation.WarmUpTemperature): time 0.003866/0.269, allocations: 2.723 MB / 0.9028 GB, free: 61.1 MB / 0.6042 GB Notification: Performance of NFInst.instExpressions: time 0.002694/0.2717, allocations: 1.624 MB / 0.9044 GB, free: 59.46 MB / 0.6042 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0004137/0.2722, allocations: 11.94 kB / 0.9044 GB, free: 59.45 MB / 0.6042 GB Notification: Performance of NFTyping.typeComponents: time 0.0008691/0.2731, allocations: 262.8 kB / 0.9047 GB, free: 59.2 MB / 0.6042 GB Notification: Performance of NFTyping.typeBindings: time 0.0003761/0.2735, allocations: 175.4 kB / 0.9048 GB, free: 59.02 MB / 0.6042 GB Notification: Performance of NFTyping.typeClassSections: time 0.0009207/0.2744, allocations: 306.6 kB / 0.9051 GB, free: 58.73 MB / 0.6042 GB Notification: Performance of NFFlatten.flatten: time 0.0005449/0.2749, allocations: 0.5004 MB / 0.9056 GB, free: 58.23 MB / 0.6042 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0005039/0.2755, allocations: 438.2 kB / 0.906 GB, free: 57.79 MB / 0.6042 GB Notification: Performance of NFEvalConstants.evaluate: time 0.00023/0.2757, allocations: 227 kB / 0.9062 GB, free: 57.57 MB / 0.6042 GB Notification: Performance of NFSimplifyModel.simplify: time 0.000228/0.2759, allocations: 242.7 kB / 0.9065 GB, free: 57.33 MB / 0.6042 GB Notification: Performance of NFPackage.collectConstants: time 5.157e-05/0.276, allocations: 20 kB / 0.9065 GB, free: 57.31 MB / 0.6042 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0001905/0.2762, allocations: 75.83 kB / 0.9066 GB, free: 57.23 MB / 0.6042 GB Notification: Performance of NFScalarize.scalarize: time 0.0001322/0.2763, allocations: 151.4 kB / 0.9067 GB, free: 57.09 MB / 0.6042 GB Notification: Performance of NFVerifyModel.verify: time 0.0001081/0.2764, allocations: 145.3 kB / 0.9069 GB, free: 56.94 MB / 0.6042 GB Notification: Performance of NFConvertDAE.convert: time 0.0004995/0.277, allocations: 0.6043 MB / 0.9074 GB, free: 56.33 MB / 0.6042 GB Notification: Performance of FrontEnd - DAE generated: time 3.337e-06/0.277, allocations: 0 / 0.9074 GB, free: 56.33 MB / 0.6042 GB Notification: Performance of FrontEnd: time 1.994e-06/0.277, allocations: 0 / 0.9074 GB, free: 56.33 MB / 0.6042 GB Notification: Performance of Transformations before backend: time 1.032e-05/0.277, allocations: 0 / 0.9074 GB, free: 56.33 MB / 0.6042 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 143 * Number of variables: 143 Notification: Performance of Generate backend data structure: time 0.001338/0.2783, allocations: 0.9581 MB / 0.9084 GB, free: 55.32 MB / 0.6042 GB Notification: Performance of prepare preOptimizeDAE: time 5.166e-05/0.2784, allocations: 11.97 kB / 0.9084 GB, free: 55.3 MB / 0.6042 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.0001104/0.2785, allocations: 102.5 kB / 0.9085 GB, free: 55.2 MB / 0.6042 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001187/0.2786, allocations: 94.88 kB / 0.9086 GB, free: 55.1 MB / 0.6042 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0006879/0.2793, allocations: 0.4959 MB / 0.9091 GB, free: 54.57 MB / 0.6042 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 8.124e-05/0.2794, allocations: 83 kB / 0.9091 GB, free: 54.48 MB / 0.6042 GB Notification: Performance of preOpt expandDerOperator (simulation): time 6.86e-05/0.2795, allocations: 60 kB / 0.9092 GB, free: 54.42 MB / 0.6042 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0008605/0.2804, allocations: 0.6481 MB / 0.9098 GB, free: 53.71 MB / 0.6042 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.854e-05/0.2804, allocations: 4 kB / 0.9098 GB, free: 53.71 MB / 0.6042 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.105e-05/0.2805, allocations: 20 kB / 0.9099 GB, free: 53.69 MB / 0.6042 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.829e-05/0.2805, allocations: 20 kB / 0.9099 GB, free: 53.67 MB / 0.6042 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0006211/0.2811, allocations: 411.5 kB / 0.9103 GB, free: 53.27 MB / 0.6042 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.00207/0.2832, allocations: 2.709 MB / 0.9129 GB, free: 50.44 MB / 0.6042 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0005436/0.2837, allocations: 279 kB / 0.9132 GB, free: 50.16 MB / 0.6042 GB Notification: Performance of preOpt evalFunc (simulation): time 3.397e-05/0.2838, allocations: 4 kB / 0.9132 GB, free: 50.16 MB / 0.6042 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.000319/0.2841, allocations: 191.6 kB / 0.9134 GB, free: 49.96 MB / 0.6042 GB Notification: Performance of pre-optimization done (n=38): time 2.635e-06/0.2841, allocations: 4 kB / 0.9134 GB, free: 49.95 MB / 0.6042 GB Notification: Performance of matching and sorting (n=38): time 0.0007396/0.2849, allocations: 435.8 kB / 0.9138 GB, free: 49.52 MB / 0.6042 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.511e-05/0.2849, allocations: 85.05 kB / 0.9139 GB, free: 49.42 MB / 0.6042 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0005512/0.2855, allocations: 0.6562 MB / 0.9145 GB, free: 48.75 MB / 0.6042 GB Notification: Performance of collectPreVariables (initialization): time 4.227e-05/0.2856, allocations: 49.69 kB / 0.9146 GB, free: 48.7 MB / 0.6042 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002187/0.2858, allocations: 388.2 kB / 0.9149 GB, free: 48.31 MB / 0.6042 GB Notification: Performance of collectInitialBindings (initialization): time 6.697e-05/0.2858, allocations: 98.73 kB / 0.915 GB, free: 48.21 MB / 0.6042 GB Notification: Performance of simplifyInitialFunctions (initialization): time 2.237e-05/0.2859, allocations: 19.94 kB / 0.915 GB, free: 48.19 MB / 0.6042 GB Notification: Performance of setup shared object (initialization): time 0.0001146/0.286, allocations: 378.8 kB / 0.9154 GB, free: 47.81 MB / 0.6042 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0002335/0.2862, allocations: 145.2 kB / 0.9155 GB, free: 47.67 MB / 0.6042 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0003161/0.2866, allocations: 353 kB / 0.9159 GB, free: 47.23 MB / 0.6042 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.000249/0.2868, allocations: 155.9 kB / 0.916 GB, free: 47.08 MB / 0.6042 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.047e-06/0.2868, allocations: 4 kB / 0.916 GB, free: 47.08 MB / 0.6042 GB Notification: Performance of matching and sorting (n=78) (initialization): time 0.0007043/0.2875, allocations: 0.5436 MB / 0.9166 GB, free: 46.53 MB / 0.6042 GB Notification: Performance of prepare postOptimizeDAE: time 1.976e-05/0.2876, allocations: 12.03 kB / 0.9166 GB, free: 46.52 MB / 0.6042 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.007e-05/0.2876, allocations: 8 kB / 0.9166 GB, free: 46.51 MB / 0.6042 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.038e-05/0.2876, allocations: 12 kB / 0.9166 GB, free: 46.5 MB / 0.6042 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.000246/0.2879, allocations: 75.78 kB / 0.9167 GB, free: 46.42 MB / 0.6042 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 2.065e-05/0.2879, allocations: 19.88 kB / 0.9167 GB, free: 46.4 MB / 0.6042 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002806/0.2882, allocations: 75.36 kB / 0.9167 GB, free: 46.33 MB / 0.6042 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.604e-05/0.2882, allocations: 28 kB / 0.9168 GB, free: 46.3 MB / 0.6042 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 27 * Number of states: 0 () * Number of discrete variables: 53 ($PRE.transition1.enableFire,$PRE.transition2.enableFire,$PRE.transition3.enableFire,$PRE.transition4.enableFire,$PRE.transition5.enableFire,$whenCondition1,$PRE.runSig.combiTimeTable.nextTimeEvent,transition5.condition,stateGraphRoot.resume,stateGraphRoot.suspend,runSig.y,runSig.combiTimeTable.nextTimeEvent,$PRE.runSig.combiTimeTable.nextTimeEventScaled,runSig.combiTimeTable.nextTimeEventScaled,actMod,transition1.enableFire,transition2.condition,transition2.enableFire,transition3.enableFire,$PRE.warUp.localActive,warUp.localActive,warUp.inPort[2].occupied,warUp.outPort[2].available,$PRE.warUp.newActive,warUp.newActive,$PRE.warUp.oldActive,warUp.oldActive,warUp.active,off.active,$PRE.off.localActive,off.localActive,off.inPort[2].occupied,off.outPort[2].available,$PRE.off.newActive,off.newActive,$PRE.off.oldActive,off.oldActive,stateGraphRoot.activeSteps,transition4.enableFire,nor.active,$PRE.nor.localActive,nor.localActive,$PRE.nor.newActive,nor.newActive,$PRE.nor.oldActive,nor.oldActive,$PRE.warUpCtr.pre.u,transition5.enableFire,$PRE.warUpCtr.hysTem.y,warUpCtr.hysTem.y,$PRE.warUpCtr.hysPow.y,warUpCtr.hysPow.y,warUpCtr.pre.u) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (78): * Single equations (assignments): 78 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0002966/0.2885, allocations: 266.8 kB / 0.917 GB, free: 46.03 MB / 0.6042 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 6.31e-05/0.2886, allocations: 63.16 kB / 0.9171 GB, free: 45.97 MB / 0.6042 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0006189/0.2892, allocations: 383.9 kB / 0.9175 GB, free: 45.59 MB / 0.6042 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 4.999e-06/0.2893, allocations: 4 kB / 0.9175 GB, free: 45.58 MB / 0.6042 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.559e-06/0.2893, allocations: 0 / 0.9175 GB, free: 45.58 MB / 0.6042 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.372e-06/0.2893, allocations: 7.953 kB / 0.9175 GB, free: 45.57 MB / 0.6042 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001155/0.2904, allocations: 1.007 MB / 0.9184 GB, free: 44.51 MB / 0.6042 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.655e-06/0.2905, allocations: 0 / 0.9184 GB, free: 44.51 MB / 0.6042 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001059/0.2906, allocations: 27.92 kB / 0.9185 GB, free: 44.48 MB / 0.6042 GB Notification: Performance of postOpt tearingSystem (simulation): time 5.039e-06/0.2906, allocations: 4 kB / 0.9185 GB, free: 44.48 MB / 0.6042 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.409e-05/0.2906, allocations: 11.94 kB / 0.9185 GB, free: 44.46 MB / 0.6042 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 2.995e-06/0.2906, allocations: 4 kB / 0.9185 GB, free: 44.46 MB / 0.6042 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.756e-06/0.2906, allocations: 8 kB / 0.9185 GB, free: 44.45 MB / 0.6042 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0004837/0.2911, allocations: 450.8 kB / 0.9189 GB, free: 44 MB / 0.6042 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0001024/0.2912, allocations: 148.2 kB / 0.9191 GB, free: 43.83 MB / 0.6042 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 6.854e-05/0.2913, allocations: 12 kB / 0.9191 GB, free: 43.82 MB / 0.6042 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001769/0.2915, allocations: 23.94 kB / 0.9191 GB, free: 43.8 MB / 0.6042 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001139/0.2916, allocations: 51.92 kB / 0.9192 GB, free: 43.75 MB / 0.6042 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.732e-05/0.2916, allocations: 19.98 kB / 0.9192 GB, free: 43.73 MB / 0.6042 GB Notification: Performance of sorting global known variables: time 0.000437/0.2921, allocations: 427 kB / 0.9196 GB, free: 43.31 MB / 0.6042 GB Notification: Performance of sort global known variables: time 1.81e-07/0.2921, allocations: 0 / 0.9196 GB, free: 43.31 MB / 0.6042 GB Notification: Performance of remove unused functions: time 0.000514/0.2926, allocations: 143.5 kB / 0.9197 GB, free: 43.17 MB / 0.6042 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 1 * Number of states: 0 () * Number of discrete variables: 35 (nor.active,off.active,warUp.localActive,$cse1,$cse2,$cse3,$cse4,$cse5,$whenCondition1,runSig.y,runSig.combiTimeTable.nextTimeEvent,runSig.combiTimeTable.nextTimeEventScaled,actMod,transition1.enableFire,transition2.condition,transition2.enableFire,transition3.enableFire,warUp.inPort[2].occupied,warUp.outPort[2].available,warUp.newActive,warUp.oldActive,warUp.active,off.localActive,off.inPort[2].occupied,off.outPort[2].available,off.newActive,off.oldActive,stateGraphRoot.activeSteps,transition4.enableFire,nor.localActive,nor.newActive,nor.oldActive,warUpCtr.hysTem.y,warUpCtr.hysPow.y,warUpCtr.pre.u) * Number of discrete states: 8 (runSig.combiTimeTable.nextTimeEvent,warUp.newActive,off.newActive,nor.newActive,warUpCtr.hysTem.y,warUpCtr.hysPow.y,warUpCtr.pre.u,runSig.combiTimeTable.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (43): * Single equations (assignments): 38 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 5 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.001557/0.2942, allocations: 1.336 MB / 0.921 GB, free: 41.97 MB / 0.6042 GB Notification: Performance of simCode: created initialization part: time 0.0006552/0.2949, allocations: 385.3 kB / 0.9214 GB, free: 41.59 MB / 0.6042 GB Notification: Performance of simCode: created event and clocks part: time 3.156e-06/0.2949, allocations: 4.062 kB / 0.9214 GB, free: 41.59 MB / 0.6042 GB Notification: Performance of simCode: created simulation system equations: time 0.0002397/0.2951, allocations: 159.8 kB / 0.9216 GB, free: 41.43 MB / 0.6042 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.000499/0.2956, allocations: 90.83 kB / 0.9216 GB, free: 41.35 MB / 0.6042 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.005832/0.3015, allocations: 7.576 MB / 0.929 GB, free: 33.59 MB / 0.6042 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0004009/0.3019, allocations: 0.9613 MB / 0.93 GB, free: 32.61 MB / 0.6042 GB Notification: Performance of simCode: alias equations: time 0.0003567/0.3023, allocations: 84.66 kB / 0.9301 GB, free: 32.53 MB / 0.6042 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0003556/0.3026, allocations: 271.3 kB / 0.9303 GB, free: 32.26 MB / 0.6042 GB Notification: Performance of SimCode: time 2.945e-06/0.3027, allocations: 4 kB / 0.9303 GB, free: 32.26 MB / 0.6042 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.02693/0.3296, allocations: 12.18 MB / 0.9422 GB, free: 20.23 MB / 0.6042 GB Notification: Performance of buildModelFMU: configured platform static using cached values: time 0.0002183/0.3299, allocations: 253 kB / 0.9425 GB, free: 19.98 MB / 0.6042 GB Notification: Performance of buildModelFMU: Generate platform static: time 2.284/2.614, allocations: 0 / 0.9425 GB, free: 19.98 MB / 0.6042 GB (rm -f Buildings_maint.7.0.x_Buildings.Fluid.CHPs.BaseClasses.Validation.WarmUpTemperature.pipe ; mkfifo Buildings_maint.7.0.x_Buildings.Fluid.CHPs.BaseClasses.Validation.WarmUpTemperature.pipe ; head -c 1048576 < Buildings_maint.7.0.x_Buildings.Fluid.CHPs.BaseClasses.Validation.WarmUpTemperature.pipe >> ../files/Buildings_maint.7.0.x_Buildings.Fluid.CHPs.BaseClasses.Validation.WarmUpTemperature.sim & /home/hudson/saved_omc/OMSimulator/install/linux/bin/OMSimulator --tempDir=temp_Buildings_maint_7_0_x_Buildings_Fluid_CHPs_BaseClasses_Validation_WarmUpTemperature_fmu --startTime=0 --stopTime=900 --timeout=50 --tolerance=1e-06 Buildings_maint_7_0_x_Buildings_Fluid_CHPs_BaseClasses_Validation_WarmUpTemperature.fmu > Buildings_maint.7.0.x_Buildings.Fluid.CHPs.BaseClasses.Validation.WarmUpTemperature.pipe 2>&1)