Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Sensors.Examples.GeneralizedSensor.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: "" <> buildModelFMU(Buildings.Electrical.AC.ThreePhasesBalanced.Sensors.Examples.GeneralizedSensor,fileNamePrefix="Buildings_8_Buildings_Electrical_AC_ThreePhasesBalanced_Sensors_Examples_GeneralizedSensor",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Buildings.Electrical.AC.ThreePhasesBalanced.Sensors.Examples.GeneralizedSensor,fileNamePrefix="Buildings_8_Buildings_Electrical_AC_ThreePhasesBalanced_Sensors_Examples_GeneralizedSensor",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 0.001688/0.001688, allocations: 108 kB / 15.6 MB, free: 132 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.002095/0.002095, allocations: 194.2 kB / 16.53 MB, free: 6.391 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.442/1.442, allocations: 205.1 MB / 222.4 MB, free: 4.57 MB / 174.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 8.1.4-maint.8.1.x/package.mo): time 1.799/1.799, allocations: 292.3 MB / 0.5489 GB, free: 12.78 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 0.001545/0.001545, allocations: 75.66 kB / 0.6716 GB, free: 26.2 MB / 0.5294 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2107/0.2122, allocations: 114.5 MB / 0.7835 GB, free: 13.38 MB / 0.6075 GB Notification: Performance of NFInst.instantiate(Buildings.Electrical.AC.ThreePhasesBalanced.Sensors.Examples.GeneralizedSensor): time 0.006047/0.2184, allocations: 2.634 MB / 0.7861 GB, free: 10.72 MB / 0.6075 GB Notification: Performance of NFInst.instExpressions: time 0.002744/0.2211, allocations: 1.516 MB / 0.7875 GB, free: 9.191 MB / 0.6075 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.0001901/0.2214, allocations: 7.938 kB / 0.7875 GB, free: 9.184 MB / 0.6075 GB Notification: Performance of NFTyping.typeComponents: time 0.0008487/0.2222, allocations: 219.1 kB / 0.7877 GB, free: 8.969 MB / 0.6075 GB Notification: Performance of NFTyping.typeBindings: time 0.0004972/0.2228, allocations: 195.2 kB / 0.7879 GB, free: 8.777 MB / 0.6075 GB Notification: Performance of NFTyping.typeClassSections: time 0.0003926/0.2232, allocations: 147.7 kB / 0.7881 GB, free: 8.633 MB / 0.6075 GB Notification: Performance of NFFlatten.flatten: time 0.0002832/0.2235, allocations: 227.3 kB / 0.7883 GB, free: 8.41 MB / 0.6075 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0003294/0.2238, allocations: 177.8 kB / 0.7885 GB, free: 8.238 MB / 0.6075 GB Notification: Performance of NFEvalConstants.evaluate: time 0.0001663/0.224, allocations: 99.61 kB / 0.7886 GB, free: 8.141 MB / 0.6075 GB Notification: Performance of NFSimplifyModel.simplify: time 0.0002349/0.2242, allocations: 111.6 kB / 0.7887 GB, free: 8.031 MB / 0.6075 GB Notification: Performance of NFPackage.collectConstants: time 3.212e-05/0.2243, allocations: 16 kB / 0.7887 GB, free: 8.016 MB / 0.6075 GB Notification: Performance of NFFlatten.collectFunctions: time 0.0003833/0.2247, allocations: 227.6 kB / 0.7889 GB, free: 7.793 MB / 0.6075 GB Notification: Performance of NFScalarize.scalarize: time 0.0001044/0.2248, allocations: 75.78 kB / 0.789 GB, free: 7.719 MB / 0.6075 GB Notification: Performance of NFVerifyModel.verify: time 0.0001039/0.2249, allocations: 87.61 kB / 0.7891 GB, free: 7.633 MB / 0.6075 GB Notification: Performance of NFConvertDAE.convert: time 0.000445/0.2253, allocations: 323 kB / 0.7894 GB, free: 7.316 MB / 0.6075 GB Notification: Performance of FrontEnd - DAE generated: time 5.8e-06/0.2254, allocations: 0 / 0.7894 GB, free: 7.316 MB / 0.6075 GB Notification: Performance of FrontEnd: time 1.824e-06/0.2254, allocations: 0 / 0.7894 GB, free: 7.316 MB / 0.6075 GB Notification: Performance of Transformations before backend: time 6.752e-06/0.2254, allocations: 0 / 0.7894 GB, free: 7.316 MB / 0.6075 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 46 * Number of variables: 46 Notification: Performance of Generate backend data structure: time 0.0008306/0.2262, allocations: 491.1 kB / 0.7898 GB, free: 6.789 MB / 0.6075 GB Notification: Performance of prepare preOptimizeDAE: time 4.811e-05/0.2263, allocations: 12.03 kB / 0.7898 GB, free: 6.777 MB / 0.6075 GB Notification: Performance of preOpt introduceOutputAliases (simulation): time 6.159e-05/0.2263, allocations: 50.73 kB / 0.7899 GB, free: 6.719 MB / 0.6075 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.0005949/0.2269, allocations: 80.66 kB / 0.79 GB, free: 6.641 MB / 0.6075 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0002807/0.2272, allocations: 231.9 kB / 0.7902 GB, free: 6.375 MB / 0.6075 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 1.753e-05/0.2273, allocations: 16.69 kB / 0.7902 GB, free: 6.359 MB / 0.6075 GB Notification: Performance of preOpt expandDerOperator (simulation): time 5.567e-05/0.2273, allocations: 16.38 kB / 0.7902 GB, free: 6.344 MB / 0.6075 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.000504/0.2278, allocations: 335.9 kB / 0.7905 GB, free: 5.98 MB / 0.6075 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.643e-05/0.2279, allocations: 0 / 0.7905 GB, free: 5.98 MB / 0.6075 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 2.831e-05/0.2279, allocations: 8 kB / 0.7905 GB, free: 5.973 MB / 0.6075 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 4.118e-05/0.2279, allocations: 16.27 kB / 0.7906 GB, free: 5.957 MB / 0.6075 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0004069/0.2284, allocations: 256.6 kB / 0.7908 GB, free: 5.707 MB / 0.6075 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.001689/0.2301, allocations: 1.63 MB / 0.7924 GB, free: 3.93 MB / 0.6075 GB Notification: Performance of preOpt comSubExp (simulation): time 0.000642/0.2307, allocations: 403.2 kB / 0.7928 GB, free: 3.48 MB / 0.6075 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001213/0.2308, allocations: 89.67 kB / 0.7929 GB, free: 3.387 MB / 0.6075 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0001412/0.231, allocations: 89.09 kB / 0.793 GB, free: 3.281 MB / 0.6075 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 2.773e-05/0.231, allocations: 34.5 kB / 0.793 GB, free: 3.238 MB / 0.6075 GB Notification: Performance of pre-optimization done (n=13): time 3.105e-06/0.231, allocations: 3.984 kB / 0.793 GB, free: 3.234 MB / 0.6075 GB Notification: Performance of matching and sorting (n=14): time 0.0006594/0.2317, allocations: 316.6 kB / 0.7933 GB, free: 2.918 MB / 0.6075 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.052e-05/0.2318, allocations: 77.48 kB / 0.7934 GB, free: 2.824 MB / 0.6075 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001476/0.2319, allocations: 176.4 kB / 0.7935 GB, free: 2.645 MB / 0.6075 GB Notification: Performance of collectPreVariables (initialization): time 1.791e-05/0.232, allocations: 33.64 kB / 0.7936 GB, free: 2.605 MB / 0.6075 GB Notification: Performance of collectInitialEqns (initialization): time 8.847e-05/0.232, allocations: 151.8 kB / 0.7937 GB, free: 2.449 MB / 0.6075 GB Notification: Performance of collectInitialBindings (initialization): time 3.616e-05/0.2321, allocations: 39.36 kB / 0.7937 GB, free: 2.41 MB / 0.6075 GB Notification: Performance of simplifyInitialFunctions (initialization): time 8.542e-05/0.2322, allocations: 53.61 kB / 0.7938 GB, free: 2.352 MB / 0.6075 GB Notification: Performance of setup shared object (initialization): time 0.0001096/0.2323, allocations: 322.8 kB / 0.7941 GB, free: 2.027 MB / 0.6075 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.000119/0.2324, allocations: 80.81 kB / 0.7942 GB, free: 1.945 MB / 0.6075 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0001664/0.2326, allocations: 164.1 kB / 0.7943 GB, free: 1.754 MB / 0.6075 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0002981/0.2329, allocations: 244.6 kB / 0.7946 GB, free: 1.484 MB / 0.6075 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.432e-06/0.2329, allocations: 4 kB / 0.7946 GB, free: 1.48 MB / 0.6075 GB Notification: Performance of matching and sorting (n=25) (initialization): time 0.0003838/0.2333, allocations: 269.2 kB / 0.7948 GB, free: 1.211 MB / 0.6075 GB Notification: Performance of prepare postOptimizeDAE: time 2.659e-05/0.2333, allocations: 4 kB / 0.7948 GB, free: 1.207 MB / 0.6075 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 9.899e-06/0.2333, allocations: 8.094 kB / 0.7948 GB, free: 1.199 MB / 0.6075 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.884e-05/0.2334, allocations: 7.984 kB / 0.7949 GB, free: 1.191 MB / 0.6075 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002455/0.2336, allocations: 60.16 kB / 0.7949 GB, free: 1.133 MB / 0.6075 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.037e-05/0.2336, allocations: 11.98 kB / 0.7949 GB, free: 1.121 MB / 0.6075 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0001419/0.2338, allocations: 23.83 kB / 0.7949 GB, free: 1.098 MB / 0.6075 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 1.897e-05/0.2338, allocations: 11.98 kB / 0.795 GB, free: 1.086 MB / 0.6075 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.0001865/0.234, allocations: 172.1 kB / 0.7951 GB, free: 0.9141 MB / 0.6075 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.000161/0.2342, allocations: 142.3 kB / 0.7953 GB, free: 0.7383 MB / 0.6075 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.0002668/0.2345, allocations: 230.1 kB / 0.7955 GB, free: 488 kB / 0.6075 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 1.302e-06/0.2345, allocations: 0 / 0.7955 GB, free: 488 kB / 0.6075 GB Notification: Performance of matching and sorting (n=25) (initialization_lambda0): time 0.000356/0.2348, allocations: 253.4 kB / 0.7957 GB, free: 228 kB / 0.6075 GB Notification: Performance of prepare postOptimizeDAE: time 9.598e-06/0.2348, allocations: 8 kB / 0.7957 GB, free: 220 kB / 0.6075 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 3.868e-06/0.2349, allocations: 4 kB / 0.7957 GB, free: 216 kB / 0.6075 GB Notification: Performance of postOpt tearingSystem (initialization): time 6.122e-06/0.2349, allocations: 7.938 kB / 0.7957 GB, free: 208 kB / 0.6075 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001759/0.235, allocations: 51.91 kB / 0.7958 GB, free: 156 kB / 0.6075 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 5.15e-06/0.2351, allocations: 4 kB / 0.7958 GB, free: 152 kB / 0.6075 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0001194/0.2352, allocations: 19.89 kB / 0.7958 GB, free: 132 kB / 0.6075 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 1.589e-05/0.2352, allocations: 12 kB / 0.7958 GB, free: 120 kB / 0.6075 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 11 * 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 (25): * Single equations (assignments): 25 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.0001444/0.2354, allocations: 196.4 kB / 0.796 GB, free: 15.92 MB / 0.6231 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 5.521e-05/0.2354, allocations: 7.906 kB / 0.796 GB, free: 15.91 MB / 0.6231 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0003656/0.2358, allocations: 212 kB / 0.7962 GB, free: 15.69 MB / 0.6231 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.727e-06/0.2358, allocations: 0 / 0.7962 GB, free: 15.69 MB / 0.6231 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 4.649e-06/0.2358, allocations: 4 kB / 0.7962 GB, free: 15.69 MB / 0.6231 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 3.306e-06/0.2358, allocations: 0 / 0.7962 GB, free: 15.69 MB / 0.6231 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.001197/0.237, allocations: 0.969 MB / 0.7972 GB, free: 14.61 MB / 0.6231 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.685e-06/0.237, allocations: 0 / 0.7972 GB, free: 14.61 MB / 0.6231 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0001334/0.2372, allocations: 39.92 kB / 0.7972 GB, free: 14.57 MB / 0.6231 GB Notification: Performance of postOpt tearingSystem (simulation): time 5.219e-06/0.2372, allocations: 4 kB / 0.7972 GB, free: 14.56 MB / 0.6231 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 1.39e-05/0.2372, allocations: 4 kB / 0.7972 GB, free: 14.56 MB / 0.6231 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 5.6e-06/0.2372, allocations: 7.984 kB / 0.7972 GB, free: 14.55 MB / 0.6231 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 6.912e-06/0.2372, allocations: 11.88 kB / 0.7972 GB, free: 14.54 MB / 0.6231 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0003667/0.2376, allocations: 436.3 kB / 0.7976 GB, free: 14.06 MB / 0.6231 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0001025/0.2377, allocations: 108.8 kB / 0.7978 GB, free: 13.94 MB / 0.6231 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 3.104e-05/0.2378, allocations: 8 kB / 0.7978 GB, free: 13.93 MB / 0.6231 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001794/0.2379, allocations: 11.98 kB / 0.7978 GB, free: 13.92 MB / 0.6231 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 3.712e-05/0.238, allocations: 27.86 kB / 0.7978 GB, free: 13.89 MB / 0.6231 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 1.26e-05/0.238, allocations: 8 kB / 0.7978 GB, free: 13.88 MB / 0.6231 GB Notification: Performance of sorting global known variables: time 0.0001071/0.2381, allocations: 135.2 kB / 0.7979 GB, free: 13.75 MB / 0.6231 GB Notification: Performance of sort global known variables: time 1.1e-07/0.2381, allocations: 0 / 0.7979 GB, free: 13.75 MB / 0.6231 GB Notification: Performance of remove unused functions: time 0.0005051/0.2386, allocations: 76 kB / 0.798 GB, free: 13.68 MB / 0.6231 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 14 * 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 simulation (14): * Single equations (assignments): 14 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.0006907/0.2393, allocations: 0.9779 MB / 0.799 GB, free: 12.64 MB / 0.6231 GB Notification: Performance of simCode: created initialization part: time 0.0004607/0.2398, allocations: 311.5 kB / 0.7993 GB, free: 12.33 MB / 0.6231 GB Notification: Performance of simCode: created event and clocks part: time 3.988e-06/0.2398, allocations: 0 / 0.7993 GB, free: 12.33 MB / 0.6231 GB Notification: Performance of simCode: created simulation system equations: time 0.0001006/0.2399, allocations: 81.27 kB / 0.7993 GB, free: 12.25 MB / 0.6231 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0004759/0.2404, allocations: 35.16 kB / 0.7994 GB, free: 12.22 MB / 0.6231 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002537/0.2429, allocations: 2.435 MB / 0.8017 GB, free: 9.578 MB / 0.6231 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0003425/0.2433, allocations: 0.7519 MB / 0.8025 GB, free: 8.801 MB / 0.6231 GB Notification: Performance of simCode: alias equations: time 0.0002102/0.2435, allocations: 77.47 kB / 0.8026 GB, free: 8.727 MB / 0.6231 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 9.014e-05/0.2436, allocations: 47.42 kB / 0.8026 GB, free: 8.68 MB / 0.6231 GB Notification: Performance of SimCode: time 6.31e-07/0.2436, allocations: 0 / 0.8026 GB, free: 8.68 MB / 0.6231 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.02286/0.2665, allocations: 3.567 MB / 0.8061 GB, free: 5.246 MB / 0.6231 GB Notification: Performance of buildModelFMU: Generate platform static: time 7.811/8.078, allocations: 9.594 kB / 0.8061 GB, free: 5.246 MB / 0.6231 GB (rm -f Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Sensors.Examples.GeneralizedSensor.pipe ; mkfifo Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Sensors.Examples.GeneralizedSensor.pipe ; head -c 1048576 < Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Sensors.Examples.GeneralizedSensor.pipe >> ../files/Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Sensors.Examples.GeneralizedSensor.sim & python3 -m fmpy simulate --output-file Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Sensors.Examples.GeneralizedSensor_res.csv --start-time 0 --stop-time 1 --timeout 50 --relative-tolerance 1e-06 Buildings_8_Buildings_Electrical_AC_ThreePhasesBalanced_Sensors_Examples_GeneralizedSensor.fmu > Buildings_8_Buildings.Electrical.AC.ThreePhasesBalanced.Sensors.Examples.GeneralizedSensor.pipe 2>&1)