Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL.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 3.2.3+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo", uses=false) Using package Buildings with version 8.1.4 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/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 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(Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL") translateModel(Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001383/0.001383, allocations: 107.1 kB / 16.36 MB, free: 6.41 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001551/0.001551, allocations: 193.7 kB / 17.3 MB, free: 5.789 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.352/1.352, allocations: 205.1 MB / 223.2 MB, free: 12.25 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.752/1.752, allocations: 292.3 MB / 0.5496 GB, free: 17.61 MB / 462.1 MB Notification: Modelica requested package Complex of version 3.2.3. Complex 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Modelica requested package ModelicaServices of version 3.2.3. ModelicaServices 4.0.0 is used instead which states that it is fully compatible without conversion script needed. Notification: Performance of FrontEnd - loaded program: time 0.001525/0.001525, allocations: 79.16 kB / 0.6729 GB, free: 5.875 MB / 0.545 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2227/0.2242, allocations: 114.6 MB / 0.7848 GB, free: 3.207 MB / 0.6544 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL): time 0.4064/0.6306, allocations: 75.22 MB / 0.8582 GB, free: 14.72 MB / 0.67 GB Notification: Performance of NFInst.instExpressions: time 0.02365/0.6543, allocations: 15.06 MB / 0.8729 GB, free: 3.934 MB / 0.67 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.003778/0.6582, allocations: 64.44 kB / 0.873 GB, free: 3.91 MB / 0.67 GB Notification: Performance of NFTyping.typeComponents: time 0.00343/0.6617, allocations: 0.8258 MB / 0.8738 GB, free: 3.395 MB / 0.67 GB Notification: Performance of NFTyping.typeBindings: time 0.009472/0.6712, allocations: 2.562 MB / 0.8763 GB, free: 1.855 MB / 0.67 GB Notification: Performance of NFTyping.typeClassSections: time 0.004564/0.6758, allocations: 1.405 MB / 0.8777 GB, free: 0.918 MB / 0.67 GB Notification: Performance of NFFlatten.flatten: time 0.007358/0.6831, allocations: 4.361 MB / 0.882 GB, free: 14.31 MB / 0.6856 GB Notification: Performance of NFFlatten.resolveConnections: time 0.003037/0.6862, allocations: 1.438 MB / 0.8834 GB, free: 13.42 MB / 0.6856 GB Notification: Performance of NFEvalConstants.evaluate: time 0.005567/0.6918, allocations: 1.641 MB / 0.885 GB, free: 12.42 MB / 0.6856 GB Notification: Performance of NFSimplifyModel.simplify: time 0.00266/0.6945, allocations: 1.223 MB / 0.8862 GB, free: 11.66 MB / 0.6856 GB Notification: Performance of NFPackage.collectConstants: time 0.0003822/0.6949, allocations: 164.6 kB / 0.8863 GB, free: 11.66 MB / 0.6856 GB Notification: Performance of NFFlatten.collectFunctions: time 0.003709/0.6986, allocations: 1.424 MB / 0.8877 GB, free: 10.91 MB / 0.6856 GB Notification: Performance of NFScalarize.scalarize: time 0.0004446/0.6991, allocations: 406.6 kB / 0.8881 GB, free: 10.58 MB / 0.6856 GB Notification: Performance of NFVerifyModel.verify: time 0.00141/0.7005, allocations: 0.9014 MB / 0.889 GB, free: 9.973 MB / 0.6856 GB Notification: Performance of NFConvertDAE.convert: time 0.00547/0.706, allocations: 2.896 MB / 0.8918 GB, free: 8.023 MB / 0.6856 GB Notification: Performance of FrontEnd - DAE generated: time 6.292e-06/0.706, allocations: 0 / 0.8918 GB, free: 8.023 MB / 0.6856 GB Notification: Performance of FrontEnd: time 2.345e-06/0.706, allocations: 0 / 0.8918 GB, free: 8.023 MB / 0.6856 GB Notification: Performance of Transformations before backend: time 5.532e-05/0.7061, allocations: 1.875 kB / 0.8918 GB, free: 8.023 MB / 0.6856 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 240 * Number of variables: 240 Notification: Performance of Generate backend data structure: time 0.00505/0.7111, allocations: 2.094 MB / 0.8938 GB, free: 6.434 MB / 0.6856 GB Notification: Performance of prepare preOptimizeDAE: time 4.463e-05/0.7112, allocations: 9.219 kB / 0.8939 GB, free: 6.434 MB / 0.6856 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0009512/0.7121, allocations: 226.5 kB / 0.8941 GB, free: 6.328 MB / 0.6856 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.00294/0.7151, allocations: 1.45 MB / 0.8955 GB, free: 5.168 MB / 0.6856 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 5.781e-05/0.7152, allocations: 76.75 kB / 0.8956 GB, free: 5.137 MB / 0.6856 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001704/0.7154, allocations: 106.2 kB / 0.8957 GB, free: 5.102 MB / 0.6856 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002173/0.7175, allocations: 1.109 MB / 0.8967 GB, free: 4.41 MB / 0.6856 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.987e-05/0.7176, allocations: 0 / 0.8967 GB, free: 4.41 MB / 0.6856 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 9.622e-05/0.7177, allocations: 38.19 kB / 0.8968 GB, free: 4.383 MB / 0.6856 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 3.746e-05/0.7177, allocations: 24.47 kB / 0.8968 GB, free: 4.383 MB / 0.6856 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.002035/0.7198, allocations: 0.8989 MB / 0.8977 GB, free: 3.934 MB / 0.6856 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 0.007271/0.7271, allocations: 4.931 MB / 0.9025 GB, free: 15.68 MB / 0.7012 GB Notification: Performance of preOpt comSubExp (simulation): time 0.001409/0.7285, allocations: 0.6139 MB / 0.9031 GB, free: 15.38 MB / 0.7012 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0007756/0.7293, allocations: 352.2 kB / 0.9034 GB, free: 15.21 MB / 0.7012 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0007048/0.73, allocations: 0.8328 MB / 0.9042 GB, free: 14.24 MB / 0.7012 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.085e-05/0.73, allocations: 36.97 kB / 0.9043 GB, free: 14.2 MB / 0.7012 GB Notification: Performance of pre-optimization done (n=62): time 3.236e-06/0.73, allocations: 1.938 kB / 0.9043 GB, free: 14.2 MB / 0.7012 GB Notification: Performance of matching and sorting (n=62): time 0.005074/0.7351, allocations: 1.401 MB / 0.9056 GB, free: 13.45 MB / 0.7012 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.299e-05/0.7352, allocations: 62.64 kB / 0.9057 GB, free: 13.38 MB / 0.7012 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001877/0.7371, allocations: 1.228 MB / 0.9069 GB, free: 12.7 MB / 0.7012 GB Notification: Performance of collectPreVariables (initialization): time 0.0001055/0.7372, allocations: 39.61 kB / 0.9069 GB, free: 12.66 MB / 0.7012 GB Notification: Performance of collectInitialEqns (initialization): time 0.0005265/0.7377, allocations: 0.5954 MB / 0.9075 GB, free: 12.1 MB / 0.7012 GB Notification: Performance of collectInitialBindings (initialization): time 0.0002196/0.738, allocations: 220.8 kB / 0.9077 GB, free: 11.88 MB / 0.7012 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0002336/0.7382, allocations: 162.5 kB / 0.9079 GB, free: 11.71 MB / 0.7012 GB Notification: Performance of setup shared object (initialization): time 0.0001104/0.7383, allocations: 337.9 kB / 0.9082 GB, free: 11.38 MB / 0.7012 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0006705/0.739, allocations: 285.8 kB / 0.9085 GB, free: 11.1 MB / 0.7012 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0009011/0.7399, allocations: 0.4998 MB / 0.909 GB, free: 10.52 MB / 0.7012 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.001393/0.7413, allocations: 0.7043 MB / 0.9097 GB, free: 9.773 MB / 0.7012 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.448e-06/0.7413, allocations: 0 / 0.9097 GB, free: 9.773 MB / 0.7012 GB Notification: Performance of matching and sorting (n=88) (initialization): time 0.004777/0.7461, allocations: 1.265 MB / 0.9109 GB, free: 8.496 MB / 0.7012 GB Notification: Performance of prepare postOptimizeDAE: time 2.426e-05/0.7462, allocations: 8 kB / 0.9109 GB, free: 8.488 MB / 0.7012 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.257e-05/0.7462, allocations: 4 kB / 0.9109 GB, free: 8.484 MB / 0.7012 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0007474/0.7469, allocations: 157.1 kB / 0.9111 GB, free: 8.328 MB / 0.7012 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006556/0.7476, allocations: 155.7 kB / 0.9112 GB, free: 8.176 MB / 0.7012 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0008464/0.7485, allocations: 0.7168 MB / 0.9119 GB, free: 7.434 MB / 0.7012 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001377/0.7498, allocations: 119.8 kB / 0.912 GB, free: 7.316 MB / 0.7012 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 7.895e-05/0.7499, allocations: 39.98 kB / 0.9121 GB, free: 7.277 MB / 0.7012 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001147/0.7511, allocations: 0.5565 MB / 0.9126 GB, free: 6.715 MB / 0.7012 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.0008476/0.752, allocations: 491.9 kB / 0.9131 GB, free: 6.16 MB / 0.7012 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.001364/0.7533, allocations: 0.6965 MB / 0.9138 GB, free: 5.414 MB / 0.7012 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 4.659e-06/0.7533, allocations: 5.344 kB / 0.9138 GB, free: 5.41 MB / 0.7012 GB Notification: Performance of matching and sorting (n=88) (initialization_lambda0): time 0.004774/0.7581, allocations: 1.269 MB / 0.915 GB, free: 4.129 MB / 0.7012 GB Notification: Performance of prepare postOptimizeDAE: time 1.551e-05/0.7582, allocations: 8 kB / 0.915 GB, free: 4.121 MB / 0.7012 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.484e-06/0.7582, allocations: 4 kB / 0.915 GB, free: 4.117 MB / 0.7012 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0006122/0.7588, allocations: 153.6 kB / 0.9152 GB, free: 3.965 MB / 0.7012 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0006152/0.7594, allocations: 155 kB / 0.9153 GB, free: 3.816 MB / 0.7012 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0007888/0.7602, allocations: 0.7247 MB / 0.916 GB, free: 3.066 MB / 0.7012 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001318/0.7615, allocations: 99.44 kB / 0.9161 GB, free: 2.969 MB / 0.7012 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 6.846e-05/0.7616, allocations: 31.98 kB / 0.9161 GB, free: 2.938 MB / 0.7012 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 15 * 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 (77): * Single equations (assignments): 76 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * 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): 1 system {(1,11)} Notification: Performance of prepare postOptimizeDAE: time 0.0002524/0.7619, allocations: 229.3 kB / 0.9164 GB, free: 2.707 MB / 0.7012 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002729/0.7622, allocations: 138.2 kB / 0.9165 GB, free: 2.57 MB / 0.7012 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.004607/0.7668, allocations: 1.249 MB / 0.9177 GB, free: 1.312 MB / 0.7012 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 1.348e-05/0.7668, allocations: 8 kB / 0.9177 GB, free: 1.305 MB / 0.7012 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 5.55e-06/0.7668, allocations: 0 / 0.9177 GB, free: 1.305 MB / 0.7012 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.004046/0.7709, allocations: 1.092 MB / 0.9188 GB, free: 184 kB / 0.7012 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.004543/0.7754, allocations: 2.322 MB / 0.921 GB, free: 13.75 MB / 0.7169 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 9.047e-06/0.7755, allocations: 4 kB / 0.9211 GB, free: 13.74 MB / 0.7169 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0005155/0.776, allocations: 111.8 kB / 0.9212 GB, free: 13.63 MB / 0.7169 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0005803/0.7766, allocations: 144.8 kB / 0.9213 GB, free: 13.49 MB / 0.7169 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 4.794e-05/0.7766, allocations: 23.92 kB / 0.9213 GB, free: 13.46 MB / 0.7169 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0007775/0.7774, allocations: 0.7125 MB / 0.922 GB, free: 12.73 MB / 0.7169 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.278e-06/0.7774, allocations: 4 kB / 0.922 GB, free: 12.73 MB / 0.7169 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002786/0.7802, allocations: 1.395 MB / 0.9234 GB, free: 11.26 MB / 0.7169 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0006835/0.7809, allocations: 303.2 kB / 0.9237 GB, free: 10.94 MB / 0.7169 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0001859/0.7811, allocations: 19.98 kB / 0.9237 GB, free: 10.92 MB / 0.7169 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.000817/0.7819, allocations: 55.78 kB / 0.9237 GB, free: 10.87 MB / 0.7169 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001214/0.7821, allocations: 59.88 kB / 0.9238 GB, free: 10.81 MB / 0.7169 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 6.426e-05/0.7822, allocations: 31.98 kB / 0.9238 GB, free: 10.78 MB / 0.7169 GB Notification: Performance of sorting global known variables: time 0.001207/0.7834, allocations: 0.8816 MB / 0.9247 GB, free: 9.898 MB / 0.7169 GB Notification: Performance of sort global known variables: time 1.8e-07/0.7834, allocations: 0 / 0.9247 GB, free: 9.898 MB / 0.7169 GB Notification: Performance of remove unused functions: time 0.001875/0.7853, allocations: 0.7174 MB / 0.9254 GB, free: 9.18 MB / 0.7169 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 15 * Number of states: 2 (heaPum.con.vol.dynBal.U,heaPum.eva.vol.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 (55): * Single equations (assignments): 50 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 4 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 1 * 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): 1 system {(1,11)} Notification: Performance of Backend phase and start with SimCode phase: time 0.0008924/0.7862, allocations: 469.1 kB / 0.9258 GB, free: 8.727 MB / 0.7169 GB Notification: Performance of simCode: created initialization part: time 0.002618/0.7888, allocations: 1.122 MB / 0.9269 GB, free: 7.613 MB / 0.7169 GB Notification: Performance of simCode: created event and clocks part: time 5.73e-06/0.7888, allocations: 0 / 0.9269 GB, free: 7.613 MB / 0.7169 GB Notification: Performance of simCode: created simulation system equations: time 0.0009195/0.7897, allocations: 408.1 kB / 0.9273 GB, free: 7.219 MB / 0.7169 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.003391/0.7931, allocations: 0.8089 MB / 0.9281 GB, free: 6.484 MB / 0.7169 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.003607/0.7968, allocations: 2.268 MB / 0.9303 GB, free: 4.141 MB / 0.7169 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.00069/0.7975, allocations: 1.164 MB / 0.9315 GB, free: 2.949 MB / 0.7169 GB Notification: Performance of simCode: alias equations: time 0.001116/0.7986, allocations: 309.9 kB / 0.9318 GB, free: 2.648 MB / 0.7169 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0002486/0.7988, allocations: 111.4 kB / 0.9319 GB, free: 2.539 MB / 0.7169 GB Notification: Performance of SimCode: time 6.81e-07/0.7989, allocations: 3.938 kB / 0.9319 GB, free: 2.535 MB / 0.7169 GB Notification: Performance of Templates: time 0.05232/0.8512, allocations: 32.31 MB / 0.9634 GB, free: 2.68 MB / 0.7481 GB make -j1 -f Buildings_8_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL.makefile (rm -f Buildings_8_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL.pipe ; mkfifo Buildings_8_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL.pipe ; head -c 1048576 < Buildings_8_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL.pipe >> ../files/Buildings_8_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL.sim & ./Buildings_8_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL -abortSlowSimulation -alarm=480 -s gbode -lv LOG_STATS > Buildings_8_Buildings.Fluid.HeatPumps.Validation.Carnot_y_etaPL.pipe 2>&1)