Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8.0.0_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.Validation.SupplySignals_Valve.conf.json
loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/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 8.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo)
Running command: translateModel(Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.Validation.SupplySignals_Valve,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8.0.0_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.Validation.SupplySignals_Valve")
translateModel(Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.Validation.SupplySignals_Valve,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8.0.0_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.Validation.SupplySignals_Valve")
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.0.0/package.mo): time 1.91/1.91, allocations: 287.5 MB / 302.6 MB, free: 8.156 MB / 234.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.3+maint.om/package.mo): time 0.001034/0.001034, allocations: 185.1 kB / 371.2 MB, free: 10.77 MB / 298.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.517/1.517, allocations: 205.4 MB / 0.6299 GB, free: 10.57 MB / 458.7 MB
Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.3+maint.om/package.mo): time 0.0008873/0.0008873, allocations: 100.7 kB / 0.7432 GB, free: 6.562 MB / 0.5573 GB
Notification: Performance of FrontEnd - loaded program: time 0.0003966/0.0003967, allocations: 11.67 kB / 0.8662 GB, free: 140.5 MB / 0.6198 GB
Notification: Performance of FrontEnd - Absyn->SCode: time 0.2194/0.2198, allocations: 115.3 MB / 0.9788 GB, free: 28.13 MB / 0.6198 GB
Notification: Performance of NFInst.instantiate(Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.Validation.SupplySignals_Valve): time 0.002031/0.2219, allocations: 2.037 MB / 0.9807 GB, free: 26.09 MB / 0.6198 GB
Notification: Performance of NFInst.instExpressions: time 0.002445/0.2244, allocations: 1.799 MB / 0.9825 GB, free: 24.27 MB / 0.6198 GB
Notification: Performance of NFInst.updateImplicitVariability: time 0.0005956/0.225, allocations: 15.94 kB / 0.9825 GB, free: 24.25 MB / 0.6198 GB
Notification: Performance of NFTyping.typeComponents: time 0.0002917/0.2253, allocations: 67.31 kB / 0.9826 GB, free: 24.19 MB / 0.6198 GB
Notification: Performance of NFTyping.typeBindings: time 0.0003575/0.2257, allocations: 67.36 kB / 0.9826 GB, free: 24.12 MB / 0.6198 GB
Notification: Performance of NFTyping.typeClassSections: time 0.0008368/0.2265, allocations: 288.6 kB / 0.9829 GB, free: 23.84 MB / 0.6198 GB
Notification: Performance of NFFlatten.flatten: time 0.0007782/0.2273, allocations: 0.8254 MB / 0.9837 GB, free: 23.02 MB / 0.6198 GB
Notification: Performance of NFFlatten.resolveConnections: time 0.0005662/0.2279, allocations: 458.5 kB / 0.9842 GB, free: 22.55 MB / 0.6198 GB
Notification: Performance of NFEvalConstants.evaluate: time 0.0003052/0.2282, allocations: 202.9 kB / 0.9844 GB, free: 22.35 MB / 0.6198 GB
Notification: Performance of NFSimplifyModel.simplify: time 0.0002571/0.2285, allocations: 242.5 kB / 0.9846 GB, free: 22.11 MB / 0.6198 GB
Notification: Performance of NFPackage.collectConstants: time 8.135e-05/0.2286, allocations: 20 kB / 0.9846 GB, free: 22.09 MB / 0.6198 GB
Notification: Performance of NFFlatten.collectFunctions: time 0.0001139/0.2287, allocations: 39.98 kB / 0.9846 GB, free: 22.05 MB / 0.6198 GB
Notification: Performance of NFScalarize.scalarize: time 7.484e-05/0.2288, allocations: 95.42 kB / 0.9847 GB, free: 21.96 MB / 0.6198 GB
Notification: Performance of NFVerifyModel.verify: time 9.65e-05/0.2289, allocations: 145.3 kB / 0.9849 GB, free: 21.81 MB / 0.6198 GB
Notification: Performance of NFConvertDAE.convert: time 0.0006843/0.2296, allocations: 1.068 MB / 0.9859 GB, free: 20.74 MB / 0.6198 GB
Notification: Performance of FrontEnd - DAE generated: time 4.849e-06/0.2296, allocations: 0 / 0.9859 GB, free: 20.74 MB / 0.6198 GB
Notification: Performance of FrontEnd: time 1.393e-06/0.2296, allocations: 0 / 0.9859 GB, free: 20.74 MB / 0.6198 GB
Notification: Performance of Transformations before backend: time 2.733e-05/0.2296, allocations: 0 / 0.9859 GB, free: 20.74 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: 162
 * Number of variables: 162
Notification: Performance of Generate backend data structure: time 0.001488/0.2311, allocations: 0.9768 MB / 0.9869 GB, free: 19.71 MB / 0.6198 GB
Notification: Performance of prepare preOptimizeDAE: time 3.328e-05/0.2311, allocations: 11.97 kB / 0.9869 GB, free: 19.7 MB / 0.6198 GB
Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0001585/0.2313, allocations: 88 kB / 0.987 GB, free: 19.61 MB / 0.6198 GB
Notification: Performance of preOpt evaluateParameters (simulation): time 0.000752/0.2321, allocations: 0.5691 MB / 0.9875 GB, free: 19 MB / 0.6198 GB
Notification: Performance of preOpt simplifyIfEquations (simulation): time 4.423e-05/0.2321, allocations: 49.69 kB / 0.9876 GB, free: 18.95 MB / 0.6198 GB
Notification: Performance of preOpt expandDerOperator (simulation): time 9.142e-05/0.2322, allocations: 71.94 kB / 0.9876 GB, free: 18.88 MB / 0.6198 GB
Notification: Performance of preOpt clockPartitioning (simulation): time 0.001069/0.2333, allocations: 0.648 MB / 0.9883 GB, free: 18.22 MB / 0.6198 GB
Notification: Performance of preOpt findStateOrder (simulation): time 1.79e-05/0.2333, allocations: 0 / 0.9883 GB, free: 18.22 MB / 0.6198 GB
Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.883e-05/0.2334, allocations: 32 kB / 0.9883 GB, free: 18.19 MB / 0.6198 GB
Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.292e-05/0.2334, allocations: 19.98 kB / 0.9883 GB, free: 18.17 MB / 0.6198 GB
Notification: Performance of preOpt removeEqualRHS (simulation): time 0.001028/0.2344, allocations: 0.5009 MB / 0.9888 GB, free: 17.67 MB / 0.6198 GB
Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.002668/0.2371, allocations: 2.16 MB / 0.9909 GB, free: 15.43 MB / 0.6198 GB
Notification: Performance of preOpt comSubExp (simulation): time 0.0009244/0.2381, allocations: 0.6557 MB / 0.9916 GB, free: 14.7 MB / 0.6198 GB
Notification: Performance of preOpt resolveLoops (simulation): time 0.0003753/0.2384, allocations: 210 kB / 0.9918 GB, free: 14.5 MB / 0.6198 GB
Notification: Performance of preOpt evalFunc (simulation): time 4.143e-05/0.2385, allocations: 4 kB / 0.9918 GB, free: 14.49 MB / 0.6198 GB
Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0005053/0.239, allocations: 283.9 kB / 0.992 GB, free: 14.19 MB / 0.6198 GB
Notification: Performance of pre-optimization done (n=41): time 2.555e-06/0.239, allocations: 0 / 0.992 GB, free: 14.19 MB / 0.6198 GB
Notification: Performance of matching and sorting (n=41): time 0.001105/0.2401, allocations: 0.543 MB / 0.9926 GB, free: 13.64 MB / 0.6198 GB
Notification: Performance of inlineWhenForInitialization (initialization): time 4.75e-05/0.2402, allocations: 158.2 kB / 0.9927 GB, free: 13.45 MB / 0.6198 GB
Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0004636/0.2407, allocations: 498.8 kB / 0.9932 GB, free: 12.95 MB / 0.6198 GB
Notification: Performance of collectPreVariables (initialization): time 3.809e-05/0.2407, allocations: 37.7 kB / 0.9932 GB, free: 12.9 MB / 0.6198 GB
Notification: Performance of collectInitialEqns (initialization): time 0.0001845/0.2409, allocations: 372.5 kB / 0.9936 GB, free: 12.54 MB / 0.6198 GB
Notification: Performance of collectInitialBindings (initialization): time 7.157e-05/0.241, allocations: 134.1 kB / 0.9937 GB, free: 12.4 MB / 0.6198 GB
Notification: Performance of simplifyInitialFunctions (initialization): time 2.513e-05/0.241, allocations: 15.94 kB / 0.9937 GB, free: 12.39 MB / 0.6198 GB
Notification: Performance of setup shared object (initialization): time 7.746e-05/0.2411, allocations: 370.7 kB / 0.9941 GB, free: 12.02 MB / 0.6198 GB
Notification: Performance of preBalanceInitialSystem (initialization): time 0.0004362/0.2415, allocations: 185 kB / 0.9943 GB, free: 11.84 MB / 0.6198 GB
Notification: Performance of partitionIndependentBlocks (initialization): time 0.0004377/0.242, allocations: 344.8 kB / 0.9946 GB, free: 11.43 MB / 0.6198 GB
Notification: Performance of analyzeInitialSystem (initialization): time 0.0007291/0.2427, allocations: 0.494 MB / 0.9951 GB, free: 10.88 MB / 0.6198 GB
Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.927e-06/0.2427, allocations: 4 kB / 0.9951 GB, free: 10.88 MB / 0.6198 GB
Notification: Performance of matching and sorting (n=66) (initialization): time 0.001134/0.2439, allocations: 0.622 MB / 0.9957 GB, free: 10.24 MB / 0.6198 GB
Notification: Performance of prepare postOptimizeDAE: time 0.0001372/0.244, allocations: 229.5 kB / 0.9959 GB, free: 9.961 MB / 0.6198 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.307e-05/0.2441, allocations: 4 kB / 0.9959 GB, free: 9.957 MB / 0.6198 GB
Notification: Performance of postOpt tearingSystem (initialization): time 2.645e-05/0.2441, allocations: 4 kB / 0.9959 GB, free: 9.953 MB / 0.6198 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0004152/0.2445, allocations: 111.8 kB / 0.996 GB, free: 9.844 MB / 0.6198 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.376e-05/0.2445, allocations: 12 kB / 0.996 GB, free: 9.832 MB / 0.6198 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004812/0.245, allocations: 101.4 kB / 0.9961 GB, free: 9.734 MB / 0.6198 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.646e-05/0.2451, allocations: 28 kB / 0.9961 GB, free: 9.707 MB / 0.6198 GB
Notification: Performance of prepare postOptimizeDAE: time 8.285e-06/0.2451, allocations: 4 kB / 0.9961 GB, free: 9.703 MB / 0.6198 GB
Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.0008275/0.2459, allocations: 0.5351 MB / 0.9967 GB, free: 9.16 MB / 0.6198 GB
Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.315e-06/0.246, allocations: 4 kB / 0.9967 GB, free: 9.156 MB / 0.6198 GB
Notification: Performance of postOpt tearingSystem (initialization): time 6.733e-06/0.246, allocations: 8 kB / 0.9967 GB, free: 9.148 MB / 0.6198 GB
Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003339/0.2463, allocations: 103.8 kB / 0.9968 GB, free: 9.047 MB / 0.6198 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 9.618e-06/0.2463, allocations: 16.11 kB / 0.9968 GB, free: 9.031 MB / 0.6198 GB
Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0004231/0.2468, allocations: 91.48 kB / 0.9969 GB, free: 8.941 MB / 0.6198 GB
Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.183e-05/0.2468, allocations: 27.98 kB / 0.9969 GB, free: 8.914 MB / 0.6198 GB
Notification: Model statistics after passing the back-end for initialization:
 * Number of independent subsystems: 16
 * Number of states: 0 ()
 * Number of discrete variables: 8 ($whenCondition4,$whenCondition1,$whenCondition2,$whenCondition3,$PRE.supFanSta.y,supFanSta.y,supSig1.conTSup.cheYMinMax.y,supSig.conTSup.cheYMinMax.y)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for initialization (64):
 * Single equations (assignments): 63
 * Array equations: 0
 * Algorithm blocks: 1
 * 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 0.0002642/0.2471, allocations: 296.9 kB / 0.9972 GB, free: 8.613 MB / 0.6198 GB
Notification: Performance of postOpt lateInlineFunction (simulation): time 6.125e-05/0.2471, allocations: 55.25 kB / 0.9972 GB, free: 8.559 MB / 0.6198 GB
Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0008085/0.248, allocations: 432.4 kB / 0.9977 GB, free: 8.121 MB / 0.6198 GB
Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.711e-06/0.248, allocations: 4 kB / 0.9977 GB, free: 8.117 MB / 0.6198 GB
Notification: Performance of postOpt constantLinearSystem (simulation): time 5.46e-06/0.248, allocations: 0 / 0.9977 GB, free: 8.117 MB / 0.6198 GB
Notification: Performance of postOpt simplifysemiLinear (simulation): time 6.161e-06/0.248, allocations: 7.938 kB / 0.9977 GB, free: 8.109 MB / 0.6198 GB
Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001435/0.2494, allocations: 1.111 MB / 0.9988 GB, free: 6.938 MB / 0.6198 GB
Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.626e-06/0.2495, allocations: 4.062 kB / 0.9988 GB, free: 6.934 MB / 0.6198 GB
Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0003604/0.2498, allocations: 79.89 kB / 0.9988 GB, free: 6.855 MB / 0.6198 GB
Notification: Performance of postOpt tearingSystem (simulation): time 5.27e-06/0.2498, allocations: 3.938 kB / 0.9988 GB, free: 6.852 MB / 0.6198 GB
Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.601e-05/0.2499, allocations: 15.98 kB / 0.9989 GB, free: 6.836 MB / 0.6198 GB
Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 2.184e-06/0.2499, allocations: 0 / 0.9989 GB, free: 6.836 MB / 0.6198 GB
Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.032e-06/0.2499, allocations: 0 / 0.9989 GB, free: 6.836 MB / 0.6198 GB
Notification: Performance of postOpt symbolicJacobian (simulation): time 0.001068/0.251, allocations: 0.6901 MB / 0.9995 GB, free: 6.129 MB / 0.6198 GB
Notification: Performance of postOpt removeConstants (simulation): time 8.257e-05/0.2511, allocations: 140.1 kB / 0.9997 GB, free: 5.973 MB / 0.6198 GB
Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 5.679e-05/0.2511, allocations: 15.94 kB / 0.9997 GB, free: 5.957 MB / 0.6198 GB
Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0002517/0.2514, allocations: 25.53 kB / 0.9997 GB, free: 5.934 MB / 0.6198 GB
Notification: Performance of postOpt findZeroCrossings (simulation): time 6.095e-05/0.2514, allocations: 27.95 kB / 0.9997 GB, free: 5.906 MB / 0.6198 GB
Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.018e-05/0.2515, allocations: 24.05 kB / 0.9998 GB, free: 5.883 MB / 0.6198 GB
Notification: Performance of sorting global known variables: time 0.0002941/0.2518, allocations: 334.9 kB / 1 GB, free: 5.559 MB / 0.6198 GB
Notification: Performance of sort global known variables: time 1.3e-07/0.2518, allocations: 0 / 1 GB, free: 5.559 MB / 0.6198 GB
Notification: Performance of remove unused functions: time 0.0006302/0.2524, allocations: 243 kB / 1 GB, free: 5.32 MB / 0.6198 GB
Notification: Model statistics after passing the back-end for simulation:
 * Number of independent subsystems: 1
 * Number of states: 2 (supSig.conTSup.I.y,supSig1.conTSup.I.y)
 * Number of discrete variables: 5 ($whenCondition4,$whenCondition3,$whenCondition1,$whenCondition2,supFanSta.y)
 * Number of discrete states: 0 ()
 * Number of clocked states: 0 ()
 * Top-level inputs: 0
Notification: Strong component statistics for simulation (41):
 * Single equations (assignments): 40
 * Array equations: 0
 * Algorithm blocks: 0
 * Record equations: 0
 * When equations: 1
 * 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 0.0001804/0.2526, allocations: 123.2 kB / 1 GB, free: 5.191 MB / 0.6198 GB
Notification: Performance of simCode: created initialization part: time 0.001331/0.2539, allocations: 0.8166 MB / 1.001 GB, free: 4.352 MB / 0.6198 GB
Notification: Performance of simCode: created event and clocks part: time 3.767e-06/0.254, allocations: 0 / 1.001 GB, free: 4.352 MB / 0.6198 GB
Notification: Performance of simCode: created simulation system equations: time 0.0003395/0.2543, allocations: 192.4 kB / 1.001 GB, free: 4.164 MB / 0.6198 GB
Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0006817/0.255, allocations: 122.2 kB / 1.002 GB, free: 4.043 MB / 0.6198 GB
Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.001854/0.2569, allocations: 1.243 MB / 1.003 GB, free: 2.777 MB / 0.6198 GB
Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0003775/0.2573, allocations: 0.8914 MB / 1.004 GB, free: 1.859 MB / 0.6198 GB
Notification: Performance of simCode: alias equations: time 0.0004358/0.2577, allocations: 80.69 kB / 1.004 GB, free: 1.781 MB / 0.6198 GB
Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001015/0.2578, allocations: 43.44 kB / 1.004 GB, free: 1.738 MB / 0.6198 GB
Notification: Performance of SimCode: time 3.3e-07/0.2578, allocations: 0 / 1.004 GB, free: 1.738 MB / 0.6198 GB
Notification: Performance of Templates: time 0.01202/0.2698, allocations: 6.154 MB / 1.01 GB, free: 11.7 MB / 0.6355 GB
make -j1 -f Buildings_8.0.0_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.Validation.SupplySignals_Valve.makefile
(rm -f Buildings_8.0.0_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.Validation.SupplySignals_Valve.pipe ; mkfifo Buildings_8.0.0_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.Validation.SupplySignals_Valve.pipe ; head -c 1048576 < Buildings_8.0.0_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.Validation.SupplySignals_Valve.pipe >> ../files/Buildings_8.0.0_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.Validation.SupplySignals_Valve.sim & ./Buildings_8.0.0_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.Validation.SupplySignals_Valve -abortSlowSimulation -alarm=480 -lv LOG_STATS > Buildings_8.0.0_Buildings.Controls.OBC.ASHRAE.G36_PR1.AHUs.MultiZone.VAV.SetPoints.Validation.SupplySignals_Valve.pipe 2>&1)