Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_maint.8.0.x_Buildings.Electrical.DC.Storage.Examples.Battery.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.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 8.0.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/package.mo) Running command: translateModel(Buildings.Electrical.DC.Storage.Examples.Battery,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.8.0.x_Buildings.Electrical.DC.Storage.Examples.Battery") translateModel(Buildings.Electrical.DC.Storage.Examples.Battery,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_maint.8.0.x_Buildings.Electrical.DC.Storage.Examples.Battery") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.1-maint.8.0.x/package.mo): time 1.978/1.978, allocations: 288.4 MB / 303.4 MB, free: 8.062 MB / 234.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.001282/0.001282, allocations: 172.5 kB / 372 MB, free: 10.27 MB / 298.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.748/1.748, allocations: 205.4 MB / 0.6307 GB, free: 9.98 MB / 458.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.000873/0.0008728, allocations: 94.27 kB / 0.7441 GB, free: 5.918 MB / 0.5573 GB Notification: Performance of FrontEnd - loaded program: time 0.0004403/0.0004404, allocations: 11 kB / 0.8669 GB, free: 142.1 MB / 0.6198 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2147/0.2151, allocations: 115.3 MB / 0.9796 GB, free: 27.67 MB / 0.6198 GB Notification: Performance of NFInst.instantiate(Buildings.Electrical.DC.Storage.Examples.Battery): time 0.003837/0.219, allocations: 3.692 MB / 0.9832 GB, free: 23.95 MB / 0.6198 GB Notification: Performance of NFInst.instExpressions: time 0.002566/0.2216, allocations: 1.933 MB / 0.9851 GB, free: 22.01 MB / 0.6198 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0002603/0.2219, allocations: 15.94 kB / 0.9851 GB, free: 21.99 MB / 0.6198 GB Notification: Performance of NFTyping.typeComponents: time 0.0002265/0.2221, allocations: 83.23 kB / 0.9852 GB, free: 21.91 MB / 0.6198 GB Notification: Performance of NFTyping.typeBindings: time 0.0003942/0.2225, allocations: 163.1 kB / 0.9853 GB, free: 21.75 MB / 0.6198 GB Notification: Performance of NFTyping.typeClassSections: time 0.0007693/0.2233, allocations: 332.7 kB / 0.9856 GB, free: 21.43 MB / 0.6198 GB Notification: Performance of NFFlatten.flatten: time 0.0006834/0.224, allocations: 0.9127 MB / 0.9865 GB, free: 20.51 MB / 0.6198 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0006989/0.2247, allocations: 0.7878 MB / 0.9873 GB, free: 19.68 MB / 0.6198 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0001933/0.2249, allocations: 251 kB / 0.9875 GB, free: 19.44 MB / 0.6198 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0003203/0.2252, allocations: 310.6 kB / 0.9878 GB, free: 19.13 MB / 0.6198 GB Notification: Performance of NFPackage.collectConstants: time 5.857e-05/0.2253, allocations: 28 kB / 0.9879 GB, free: 19.11 MB / 0.6198 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0001973/0.2255, allocations: 95.88 kB / 0.988 GB, free: 19.01 MB / 0.6198 GB Notification: Performance of NFScalarize.scalarize: time 0.00012/0.2256, allocations: 167.4 kB / 0.9881 GB, free: 18.85 MB / 0.6198 GB Notification: Performance of NFVerifyModel.verify: time 9.623e-05/0.2257, allocations: 133.4 kB / 0.9882 GB, free: 18.71 MB / 0.6198 GB Notification: Performance of NFConvertDAE.convert: time 0.0004459/0.2262, allocations: 0.6431 MB / 0.9889 GB, free: 18.07 MB / 0.6198 GB Notification: Performance of FrontEnd - DAE generated: time 5.23e-06/0.2262, allocations: 4 kB / 0.9889 GB, free: 18.06 MB / 0.6198 GB Notification: Performance of FrontEnd: time 1.683e-06/0.2262, allocations: 0 / 0.9889 GB, free: 18.06 MB / 0.6198 GB Notification: Performance of Transformations before backend: time 9.948e-06/0.2262, allocations: 0 / 0.9889 GB, free: 18.06 MB / 0.6198 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 191 * Number of variables: 191 Notification: Performance of Generate backend data structure: time 0.001164/0.2274, allocations: 0.8087 MB / 0.9897 GB, free: 17.21 MB / 0.6198 GB Notification: Performance of prepare preOptimizeDAE: time 4.244e-05/0.2275, allocations: 12.02 kB / 0.9897 GB, free: 17.2 MB / 0.6198 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0004517/0.2279, allocations: 123 kB / 0.9898 GB, free: 17.07 MB / 0.6198 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0004616/0.2284, allocations: 427.7 kB / 0.9902 GB, free: 16.62 MB / 0.6198 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.284e-05/0.2284, allocations: 61.98 kB / 0.9903 GB, free: 16.56 MB / 0.6198 GB Notification: Performance of preOpt expandDerOperator (simulation): time 9.15e-05/0.2285, allocations: 76 kB / 0.9903 GB, free: 16.48 MB / 0.6198 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.001022/0.2296, allocations: 0.8691 MB / 0.9912 GB, free: 15.55 MB / 0.6198 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.057e-05/0.2296, allocations: 4 kB / 0.9912 GB, free: 15.55 MB / 0.6198 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 5.667e-05/0.2297, allocations: 32 kB / 0.9912 GB, free: 15.52 MB / 0.6198 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.575e-05/0.2297, allocations: 53.94 kB / 0.9913 GB, free: 15.46 MB / 0.6198 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.000763/0.2305, allocations: 0.5697 MB / 0.9918 GB, free: 14.89 MB / 0.6198 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.002932/0.2334, allocations: 3.716 MB / 0.9954 GB, free: 10.96 MB / 0.6198 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0004751/0.2339, allocations: 317.2 kB / 0.9958 GB, free: 10.64 MB / 0.6198 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0003186/0.2343, allocations: 214.9 kB / 0.996 GB, free: 10.43 MB / 0.6198 GB Notification: Performance of preOpt evalFunc (simulation): time 2.938e-05/0.2343, allocations: 8.375 kB / 0.996 GB, free: 10.42 MB / 0.6198 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0003225/0.2346, allocations: 247.9 kB / 0.9962 GB, free: 10.16 MB / 0.6198 GB Notification: Performance of pre-optimization done (n=47): time 2.134e-06/0.2346, allocations: 0 / 0.9962 GB, free: 10.16 MB / 0.6198 GB Notification: Performance of matching and sorting (n=47): time 0.0006649/0.2353, allocations: 453.3 kB / 0.9966 GB, free: 9.715 MB / 0.6198 GB Notification: Performance of inlineWhenForInitialization (initialization): time 3.647e-05/0.2354, allocations: 85.23 kB / 0.9967 GB, free: 9.613 MB / 0.6198 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0003097/0.2357, allocations: 425.1 kB / 0.9971 GB, free: 9.188 MB / 0.6198 GB Notification: Performance of collectPreVariables (initialization): time 4.224e-05/0.2357, allocations: 45.7 kB / 0.9972 GB, free: 9.137 MB / 0.6198 GB Notification: Performance of collectInitialEqns (initialization): time 0.0001555/0.2359, allocations: 339.5 kB / 0.9975 GB, free: 8.801 MB / 0.6198 GB Notification: Performance of collectInitialBindings (initialization): time 7.791e-05/0.236, allocations: 130.3 kB / 0.9976 GB, free: 8.672 MB / 0.6198 GB Notification: Performance of simplifyInitialFunctions (initialization): time 2.246e-05/0.236, allocations: 16 kB / 0.9976 GB, free: 8.656 MB / 0.6198 GB Notification: Performance of setup shared object (initialization): time 7.1e-05/0.2361, allocations: 354.8 kB / 0.998 GB, free: 8.301 MB / 0.6198 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0002241/0.2363, allocations: 153.9 kB / 0.9981 GB, free: 8.148 MB / 0.6198 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0003058/0.2366, allocations: 396.4 kB / 0.9985 GB, free: 7.664 MB / 0.6198 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0002632/0.2369, allocations: 190.1 kB / 0.9987 GB, free: 7.477 MB / 0.6198 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.847e-06/0.2369, allocations: 0 / 0.9987 GB, free: 7.477 MB / 0.6198 GB Notification: Performance of matching and sorting (n=92) (initialization): time 0.0006985/0.2376, allocations: 0.5883 MB / 0.9992 GB, free: 6.883 MB / 0.6198 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001005/0.2377, allocations: 298.2 kB / 0.9995 GB, free: 6.488 MB / 0.6198 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.828e-06/0.2378, allocations: 12 kB / 0.9995 GB, free: 6.477 MB / 0.6198 GB Notification: Performance of postOpt tearingSystem (initialization): time 2.458e-05/0.2378, allocations: 12 kB / 0.9996 GB, free: 6.465 MB / 0.6198 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002969/0.2381, allocations: 99.77 kB / 0.9996 GB, free: 6.367 MB / 0.6198 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.409e-05/0.2381, allocations: 15.92 kB / 0.9997 GB, free: 6.352 MB / 0.6198 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002842/0.2384, allocations: 87.11 kB / 0.9997 GB, free: 6.266 MB / 0.6198 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.229e-05/0.2385, allocations: 32 kB / 0.9998 GB, free: 6.234 MB / 0.6198 GB Notification: Performance of prepare postOptimizeDAE: time 5.981e-06/0.2385, allocations: 4 kB / 0.9998 GB, free: 6.23 MB / 0.6198 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.0006385/0.2391, allocations: 0.517 MB / 1 GB, free: 5.715 MB / 0.6198 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.502e-06/0.2391, allocations: 8 kB / 1 GB, free: 5.707 MB / 0.6198 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.018e-05/0.2391, allocations: 15.95 kB / 1 GB, free: 5.691 MB / 0.6198 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002798/0.2394, allocations: 103.8 kB / 1 GB, free: 5.59 MB / 0.6198 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.055e-05/0.2395, allocations: 15.94 kB / 1 GB, free: 5.574 MB / 0.6198 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0002573/0.2397, allocations: 67.36 kB / 1 GB, free: 5.508 MB / 0.6198 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.886e-05/0.2398, allocations: 36 kB / 1.001 GB, free: 5.473 MB / 0.6198 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 32 * Number of states: 0 () * Number of discrete variables: 48 ($PRE.toOn.enableFire,$PRE.toHold.enableFire,$PRE.toDischarge.enableFire,$PRE.toOff.enableFire,$whenCondition1,$PRE.bat.cha.underCharged,bat.cha.underCharged,$PRE.bat.cha.overCharged,bat.cha.overCharged,off.active,$PRE.off.localActive,off.localActive,$PRE.off.newActive,off.newActive,$PRE.off.oldActive,off.oldActive,toOn.condition,toOn.enableFire,$PRE.charge.localActive,charge.localActive,$PRE.charge.newActive,charge.newActive,$PRE.charge.oldActive,charge.oldActive,charge.active,toHold.condition,toHold.enableFire,hold.active,$PRE.hold.localActive,hold.localActive,$PRE.hold.newActive,hold.newActive,$PRE.hold.oldActive,hold.oldActive,toDischarge.condition,toDischarge.enableFire,$PRE.discharge.localActive,discharge.localActive,$PRE.discharge.newActive,discharge.newActive,$PRE.discharge.oldActive,discharge.oldActive,discharge.active,toOff.condition,toOff.enableFire,stateGraphRoot.activeSteps,stateGraphRoot.resume,stateGraphRoot.suspend) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (92): * Single equations (assignments): 92 * 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 0.000247/0.24, allocations: 325 kB / 1.001 GB, free: 5.145 MB / 0.6198 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 4.846e-05/0.2401, allocations: 47.38 kB / 1.001 GB, free: 5.098 MB / 0.6198 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0005595/0.2406, allocations: 397 kB / 1.001 GB, free: 4.699 MB / 0.6198 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 7.003e-06/0.2407, allocations: 8 kB / 1.001 GB, free: 4.691 MB / 0.6198 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.222e-06/0.2407, allocations: 0 / 1.001 GB, free: 4.691 MB / 0.6198 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 7.604e-06/0.2407, allocations: 3.984 kB / 1.001 GB, free: 4.688 MB / 0.6198 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001256/0.2419, allocations: 1.214 MB / 1.002 GB, free: 3.395 MB / 0.6198 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.565e-06/0.242, allocations: 0 / 1.002 GB, free: 3.395 MB / 0.6198 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001949/0.2422, allocations: 55.78 kB / 1.003 GB, free: 3.34 MB / 0.6198 GB Notification: Performance of postOpt tearingSystem (simulation): time 4.088e-06/0.2422, allocations: 4.125 kB / 1.003 GB, free: 3.336 MB / 0.6198 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.353e-05/0.2422, allocations: 12 kB / 1.003 GB, free: 3.324 MB / 0.6198 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 3.306e-06/0.2422, allocations: 4 kB / 1.003 GB, free: 3.32 MB / 0.6198 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.433e-06/0.2422, allocations: 0 / 1.003 GB, free: 3.32 MB / 0.6198 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0006807/0.2429, allocations: 0.6516 MB / 1.003 GB, free: 2.641 MB / 0.6198 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0001095/0.243, allocations: 148.5 kB / 1.003 GB, free: 2.477 MB / 0.6198 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 5.161e-05/0.2431, allocations: 16 kB / 1.003 GB, free: 2.461 MB / 0.6198 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001742/0.2433, allocations: 15.98 kB / 1.003 GB, free: 2.445 MB / 0.6198 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 9.943e-05/0.2434, allocations: 44.38 kB / 1.003 GB, free: 2.402 MB / 0.6198 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.551e-05/0.2434, allocations: 19.98 kB / 1.003 GB, free: 2.383 MB / 0.6198 GB Notification: Performance of sorting global known variables: time 0.0001977/0.2436, allocations: 255.2 kB / 1.004 GB, free: 2.133 MB / 0.6198 GB Notification: Performance of sort global known variables: time 1.41e-07/0.2436, allocations: 0 / 1.004 GB, free: 2.133 MB / 0.6198 GB Notification: Performance of remove unused functions: time 0.0006953/0.2443, allocations: 275 kB / 1.004 GB, free: 1.863 MB / 0.6198 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * Number of states: 1 (bat.cha.SOC) * Number of discrete variables: 32 (off.localActive,charge.localActive,hold.localActive,discharge.localActive,$cse1,$cse2,$cse3,$cse4,$whenCondition1,bat.cha.underCharged,bat.cha.overCharged,off.active,off.newActive,off.oldActive,toOn.condition,toOn.enableFire,charge.newActive,charge.oldActive,charge.active,toHold.condition,toHold.enableFire,hold.active,hold.newActive,hold.oldActive,toDischarge.condition,toDischarge.enableFire,discharge.newActive,discharge.oldActive,discharge.active,toOff.condition,toOff.enableFire,stateGraphRoot.activeSteps) * Number of discrete states: 6 (discharge.newActive,hold.newActive,charge.newActive,off.newActive,bat.cha.underCharged,bat.cha.overCharged) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (52): * Single equations (assignments): 48 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 4 * 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 0.0001829/0.2445, allocations: 129.4 kB / 1.004 GB, free: 1.727 MB / 0.6198 GB Notification: Performance of simCode: created initialization part: time 0.0008933/0.2454, allocations: 0.707 MB / 1.005 GB, free: 1.023 MB / 0.6198 GB Notification: Performance of simCode: created event and clocks part: time 2.635e-06/0.2454, allocations: 0 / 1.005 GB, free: 1.023 MB / 0.6198 GB Notification: Performance of simCode: created simulation system equations: time 0.0002273/0.2456, allocations: 190.4 kB / 1.005 GB, free: 0.8359 MB / 0.6198 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0005552/0.2462, allocations: 104.3 kB / 1.005 GB, free: 0.7383 MB / 0.6198 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001542/0.2478, allocations: 1.213 MB / 1.006 GB, free: 15.49 MB / 0.6355 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0005329/0.2483, allocations: 0.9072 MB / 1.007 GB, free: 14.55 MB / 0.6355 GB Notification: Performance of simCode: alias equations: time 0.0003737/0.2487, allocations: 108.7 kB / 1.007 GB, free: 14.45 MB / 0.6355 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001262/0.2488, allocations: 55.42 kB / 1.007 GB, free: 14.39 MB / 0.6355 GB Notification: Performance of SimCode: time 2.21e-07/0.2488, allocations: 0 / 1.007 GB, free: 14.39 MB / 0.6355 GB Notification: Performance of Templates: time 0.01024/0.2591, allocations: 5.413 MB / 1.013 GB, free: 9.035 MB / 0.6355 GB make -j1 -f Buildings_maint.8.0.x_Buildings.Electrical.DC.Storage.Examples.Battery.makefile (rm -f Buildings_maint.8.0.x_Buildings.Electrical.DC.Storage.Examples.Battery.pipe ; mkfifo Buildings_maint.8.0.x_Buildings.Electrical.DC.Storage.Examples.Battery.pipe ; head -c 1048576 < Buildings_maint.8.0.x_Buildings.Electrical.DC.Storage.Examples.Battery.pipe >> ../files/Buildings_maint.8.0.x_Buildings.Electrical.DC.Storage.Examples.Battery.sim & ./Buildings_maint.8.0.x_Buildings.Electrical.DC.Storage.Examples.Battery -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_maint.8.0.x_Buildings.Electrical.DC.Storage.Examples.Battery.pipe 2>&1)