Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr ModelicaTest_3.2.2_ModelicaTest.MultiBody.InitializationConversion.Joints.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.2+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.2+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.2+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.2+maint.om/package.mo", uses=false) Using package ModelicaTest with version 3.2.2 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.2+maint.om/package.mo) Using package ModelicaServices with version 3.2.2 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.2+maint.om/package.mo) Using package Modelica with version 3.2.2 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.2+maint.om/package.mo) Using package Complex with version 3.2.2 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.2+maint.om/package.mo) Running command: translateModel(ModelicaTest.MultiBody.InitializationConversion.Joints,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ModelicaTest_3.2.2_ModelicaTest.MultiBody.InitializationConversion.Joints") translateModel(ModelicaTest.MultiBody.InitializationConversion.Joints,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="ModelicaTest_3.2.2_ModelicaTest.MultiBody.InitializationConversion.Joints") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 3.2.2+maint.om/package.mo): time 0.001562/0.001562, allocations: 176.5 kB / 7.652 MB, free: 1.426 MB / 5.871 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.2+maint.om/package.mo): time 1.415/1.415, allocations: 194.4 MB / 202.4 MB, free: 12.95 MB / 170.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 3.2.2+maint.om/package.mo): time 0.001738/0.001738, allocations: 119.9 kB / 247.4 MB, free: 15.96 MB / 218.7 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaTest 3.2.2+maint.om/package.mo): time 0.1732/0.1732, allocations: 39.95 MB / 332.2 MB, free: 0.6367 MB / 234.7 MB Notification: Performance of FrontEnd - loaded program: time 2.617e-05/2.625e-05, allocations: 4 kB / 393.3 MB, free: 3.441 MB / 298.7 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.2538/0.2539, allocations: 54.87 MB / 448.2 MB, free: 13.68 MB / 298.7 MB Notification: Performance of FrontEnd - scodeFlatten: time 0.388/0.6419, allocations: 106.5 MB / 0.5417 GB, free: 35.87 MB / 378.7 MB Notification: Performance of FrontEnd - mkProgramGraph: time 0.0001853/0.6422, allocations: 71.95 kB / 0.5417 GB, free: 35.87 MB / 378.7 MB Notification: Performance of FrontEnd - DAE generated: time 0.9359/1.578, allocations: 253.4 MB / 0.7892 GB, free: 51.73 MB / 474.7 MB Notification: Performance of FrontEnd: time 3.487e-06/1.578, allocations: 0 / 0.7892 GB, free: 51.73 MB / 474.7 MB Notification: Performance of Transformations before backend: time 0.001621/1.58, allocations: 273.5 kB / 0.7895 GB, free: 51.72 MB / 474.7 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 3972 * Number of variables: 3972 Notification: Performance of Generate backend data structure: time 0.05073/1.631, allocations: 13.55 MB / 0.8027 GB, free: 47.05 MB / 474.7 MB Notification: Performance of prepare preOptimizeDAE: time 5.528e-05/1.631, allocations: 10.09 kB / 0.8027 GB, free: 47.05 MB / 474.7 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.1156/1.746, allocations: 26.82 MB / 0.8289 GB, free: 43.21 MB / 474.7 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.07539/1.822, allocations: 27.1 MB / 0.8554 GB, free: 18.52 MB / 474.7 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0008466/1.823, allocations: 388 kB / 0.8557 GB, free: 18.14 MB / 474.7 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.006741/1.829, allocations: 0.747 MB / 0.8565 GB, free: 17.39 MB / 474.7 MB Notification: Performance of preOpt removeEqualFunctionCalls (simulation): time 0.03406/1.863, allocations: 15.95 MB / 0.872 GB, free: 1.445 MB / 474.7 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.4321/2.296, allocations: 23.62 MB / 0.8951 GB, free: 47.15 MB / 490.7 MB Notification: Performance of preOpt findStateOrder (simulation): time 0.001381/2.297, allocations: 181.2 kB / 0.8953 GB, free: 47.15 MB / 490.7 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.00591/2.303, allocations: 59.97 kB / 0.8953 GB, free: 47.15 MB / 490.7 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.004408/2.307, allocations: 2.417 MB / 0.8977 GB, free: 47.12 MB / 490.7 MB Warning: The model contains alias variables with conflicting start and/or 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 0.1741/2.482, allocations: 116.1 MB / 1.011 GB, free: 31.86 MB / 0.5261 GB Notification: Performance of preOpt comSubExp (simulation): time 0.01698/2.499, allocations: 10.6 MB / 1.021 GB, free: 27.02 MB / 0.5261 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.01147/2.51, allocations: 8.431 MB / 1.03 GB, free: 23.32 MB / 0.5261 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001093/2.511, allocations: 407.5 kB / 1.03 GB, free: 23.02 MB / 0.5261 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0001212/2.511, allocations: 99.44 kB / 1.03 GB, free: 22.93 MB / 0.5261 GB Notification: Performance of pre-optimization done (n=550): time 1.487e-05/2.511, allocations: 2.719 kB / 1.03 GB, free: 22.93 MB / 0.5261 GB Notification: Performance of matching and sorting (n=747): time 0.7009/3.212, allocations: 107.9 MB / 1.136 GB, free: 98.23 MB / 0.5261 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0002227/3.213, allocations: 0.6596 MB / 1.136 GB, free: 97.51 MB / 0.5261 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.01532/3.228, allocations: 8.271 MB / 1.144 GB, free: 96.84 MB / 0.5261 GB Notification: Performance of collectPreVariables (initialization): time 0.002812/3.231, allocations: 29.64 kB / 1.144 GB, free: 96.81 MB / 0.5261 GB Notification: Performance of collectInitialEqns (initialization): time 0.006997/3.238, allocations: 8.295 MB / 1.152 GB, free: 93.11 MB / 0.5261 GB Notification: Performance of collectInitialBindings (initialization): time 0.005282/3.243, allocations: 2.626 MB / 1.155 GB, free: 91.46 MB / 0.5261 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.001665/3.245, allocations: 0 / 1.155 GB, free: 91.46 MB / 0.5261 GB Notification: Performance of setup shared object (initialization): time 0.0008383/3.246, allocations: 0.92 MB / 1.156 GB, free: 91.12 MB / 0.5261 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.01308/3.259, allocations: 9.129 MB / 1.165 GB, free: 87.84 MB / 0.5261 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.02387/3.283, allocations: 16.11 MB / 1.181 GB, free: 75.04 MB / 0.5261 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.02278/3.306, allocations: 12 MB / 1.192 GB, free: 70.78 MB / 0.5261 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 0.0005421/3.306, allocations: 71.56 kB / 1.192 GB, free: 70.78 MB / 0.5261 GB Notification: Performance of matching and sorting (n=1888) (initialization): time 0.1342/3.44, allocations: 44.3 MB / 1.236 GB, free: 47.1 MB / 0.5261 GB Notification: Performance of prepare postOptimizeDAE: time 0.0005177/3.441, allocations: 108 kB / 1.236 GB, free: 46.99 MB / 0.5261 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.09842/3.539, allocations: 33.53 MB / 1.268 GB, free: 21.84 MB / 0.5261 GB Notification: Tearing is skipped for strong component 3 because system size of 214 exceeds maximum system size for tearing of linear systems (200). To adjust the maximum system size for tearing use --maxSizeLinearTearing= and --maxSizeNonlinearTearing=. Notification: Performance of postOpt tearingSystem (initialization): time 0.4773/4.017, allocations: 11.97 MB / 1.28 GB, free: 88.02 MB / 0.5261 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.01633/4.033, allocations: 3.244 MB / 1.283 GB, free: 88.02 MB / 0.5261 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.02403/4.057, allocations: 14.92 MB / 1.298 GB, free: 85.59 MB / 0.5261 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.01845/4.076, allocations: 1.043 MB / 1.299 GB, free: 85.59 MB / 0.5261 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.006644/4.082, allocations: 0.796 MB / 1.3 GB, free: 85.59 MB / 0.5261 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 1091 * Number of states: 0 () * Number of discrete variables: 108 (freeMotion.arrowColor[3],freeMotion.arrowColor[2],freeMotion.arrowColor[1],bodyBox8.color[3],bodyBox8.color[2],bodyBox8.color[1],bodyBox8.body.sphereColor[3],bodyBox8.body.sphereColor[2],bodyBox8.body.sphereColor[1],bodyBox7.color[3],bodyBox7.color[2],bodyBox7.color[1],bodyBox7.body.sphereColor[3],bodyBox7.body.sphereColor[2],bodyBox7.body.sphereColor[1],spherical.sphereColor[3],spherical.sphereColor[2],spherical.sphereColor[1],bodyBox6.color[3],bodyBox6.color[2],bodyBox6.color[1],bodyBox6.body.sphereColor[3],bodyBox6.body.sphereColor[2],bodyBox6.body.sphereColor[1],planar.cylinderColor[3],planar.cylinderColor[2],planar.cylinderColor[1],planar.boxColor[3],planar.boxColor[2],planar.boxColor[1],planar.revolute.cylinderColor[3],planar.revolute.cylinderColor[2],planar.revolute.cylinderColor[1],planar.prismatic_y.boxColor[3],planar.prismatic_y.boxColor[2],planar.prismatic_y.boxColor[1],planar.prismatic_x.boxColor[3],planar.prismatic_x.boxColor[2],planar.prismatic_x.boxColor[1],bodyBox5.color[3],bodyBox5.color[2],bodyBox5.color[1],bodyBox5.body.sphereColor[3],bodyBox5.body.sphereColor[2],bodyBox5.body.sphereColor[1],universal.cylinderColor[3],universal.cylinderColor[2],universal.cylinderColor[1],bodyBox4.color[3],bodyBox4.color[2],bodyBox4.color[1],bodyBox4.body.sphereColor[3],bodyBox4.body.sphereColor[2],bodyBox4.body.sphereColor[1],bodyBox3.color[3],bodyBox3.color[2],bodyBox3.color[1],bodyBox3.body.sphereColor[3],bodyBox3.body.sphereColor[2],bodyBox3.body.sphereColor[1],cylindrical.cylinderColor[3],cylindrical.cylinderColor[2],cylindrical.cylinderColor[1],cylindrical.revolute.cylinderColor[3],cylindrical.revolute.cylinderColor[2],cylindrical.revolute.cylinderColor[1],cylindrical.prismatic.boxColor[3],cylindrical.prismatic.boxColor[2],cylindrical.prismatic.boxColor[1],actuatedPrismatic.boxColor[3],actuatedPrismatic.boxColor[2],actuatedPrismatic.boxColor[1],bodyBox2.color[3],bodyBox2.color[2],bodyBox2.color[1],bodyBox2.body.sphereColor[3],bodyBox2.body.sphereColor[2],bodyBox2.body.sphereColor[1],prismatic.boxColor[3],prismatic.boxColor[2],prismatic.boxColor[1],bodyBox1.color[3],bodyBox1.color[2],bodyBox1.color[1],bodyBox1.body.sphereColor[3],bodyBox1.body.sphereColor[2],bodyBox1.body.sphereColor[1],actuatedRevolute.cylinderColor[3],actuatedRevolute.cylinderColor[2],actuatedRevolute.cylinderColor[1],bodyBox.color[3],bodyBox.color[2],bodyBox.color[1],bodyBox.body.sphereColor[3],bodyBox.body.sphereColor[2],bodyBox.body.sphereColor[1],revolute.cylinderColor[3],revolute.cylinderColor[2],revolute.cylinderColor[1],world.gravityArrowColor[3],world.gravityArrowColor[2],world.gravityArrowColor[1],world.axisColor_x[3],world.axisColor_x[2],world.axisColor_x[1],world.gravitySphereColor[3],world.gravitySphereColor[2],world.gravitySphereColor[1]) * Number of discrete states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (1616): * Single equations (assignments): 1604 * Array equations: 5 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 6 * Torn equation systems: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 5 {(4,100.0%),(3,100.0%),(3,100.0%),(4,100.0%),(214,1.6%)} * Non-linear Jacobian: 1 {4} * Without analytic Jacobian: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 1 {4 9} Notification: Performance of prepare postOptimizeDAE: time 0.00781/4.09, allocations: 0.7625 MB / 1.3 GB, free: 85.47 MB / 0.5261 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.004095/4.094, allocations: 1.023 MB / 1.301 GB, free: 85.47 MB / 0.5261 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.05343/4.148, allocations: 27 MB / 1.328 GB, free: 84.93 MB / 0.5261 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 0.05233/4.2, allocations: 24.44 MB / 1.352 GB, free: 82.63 MB / 0.5261 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 0.0001216/4.2, allocations: 42.91 kB / 1.352 GB, free: 82.63 MB / 0.5261 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.0002833/4.201, allocations: 38.16 kB / 1.352 GB, free: 82.63 MB / 0.5261 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.1206/4.321, allocations: 55.07 MB / 1.405 GB, free: 58.33 MB / 0.5261 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 6.111e-05/4.321, allocations: 4 kB / 1.405 GB, free: 58.33 MB / 0.5261 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.006417/4.328, allocations: 1.173 MB / 1.407 GB, free: 57.48 MB / 0.5261 GB Notification: Tearing is skipped for strong component 12 because system size of 211 exceeds maximum system size for tearing of linear systems (200). To adjust the maximum system size for tearing use --maxSizeLinearTearing= and --maxSizeNonlinearTearing=. Notification: Performance of postOpt tearingSystem (simulation): time 0.006208/4.334, allocations: 2.098 MB / 1.409 GB, free: 56.21 MB / 0.5261 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.002547/4.337, allocations: 55.5 kB / 1.409 GB, free: 56.18 MB / 0.5261 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.006174/4.343, allocations: 4.793 MB / 1.413 GB, free: 52.41 MB / 0.5261 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 0.001205/4.344, allocations: 1.635 MB / 1.415 GB, free: 50.77 MB / 0.5261 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.06935/4.413, allocations: 39.13 MB / 1.453 GB, free: 15.88 MB / 0.5261 GB Notification: Performance of postOpt removeConstants (simulation): time 0.008918/4.422, allocations: 2.701 MB / 1.456 GB, free: 13.71 MB / 0.5261 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.006273/4.429, allocations: 19.98 kB / 1.456 GB, free: 13.69 MB / 0.5261 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.01098/4.44, allocations: 0.6338 MB / 1.456 GB, free: 13.06 MB / 0.5261 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.003133/4.443, allocations: 0.6645 MB / 1.457 GB, free: 12.39 MB / 0.5261 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.001579/4.444, allocations: 191.9 kB / 1.457 GB, free: 12.21 MB / 0.5261 GB Notification: Performance of sorting global known variables: time 0.01228/4.457, allocations: 5.789 MB / 1.463 GB, free: 6.461 MB / 0.5261 GB Notification: Performance of sort global known variables: time 4.6e-07/4.457, allocations: 1.125 kB / 1.463 GB, free: 6.461 MB / 0.5261 GB Notification: Performance of remove unused functions: time 0.01866/4.475, allocations: 3.438 MB / 1.466 GB, free: 3.031 MB / 0.5261 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 5 * Number of states: 40 ($STATESET3.x[6],$STATESET3.x[5],$STATESET3.x[4],$STATESET3.x[3],$STATESET3.x[2],$STATESET3.x[1],revolute.phi,revolute.w,actuatedRevolute.phi,actuatedRevolute.w,prismatic.s,prismatic.v,actuatedPrismatic.s,actuatedPrismatic.v,cylindrical.s,cylindrical.phi,cylindrical.v,cylindrical.w,universal.phi_a,universal.phi_b,universal.w_a,universal.w_b,planar.s_x,planar.s_y,planar.phi,planar.v_x,planar.v_y,planar.w,bodyBox7.body.w_a[1],bodyBox7.body.w_a[2],bodyBox7.body.w_a[3],freeMotion.r_rel_a[1],freeMotion.r_rel_a[2],freeMotion.r_rel_a[3],freeMotion.v_rel_a[1],freeMotion.v_rel_a[2],freeMotion.v_rel_a[3],freeMotion.w_rel_b[1],freeMotion.w_rel_b[2],freeMotion.w_rel_b[3]) * Number of discrete variables: 0 () * Number of discrete states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (509): * Single equations (assignments): 500 * Array equations: 3 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 6 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details: * Constant Jacobian: 0 * Linear Jacobian (size,density): 5 {(3,100.0%),(211,1.7%),(4,100.0%),(3,100.0%),(4,100.0%)} * Non-linear Jacobian: 1 {8} * Without analytic Jacobian: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.002205/4.478, allocations: 208.1 kB / 1.467 GB, free: 2.848 MB / 0.5261 GB Notification: Performance of simCode: created initialization part: time 0.4033/4.881, allocations: 26.57 MB / 1.492 GB, free: 103 MB / 0.5417 GB Notification: Performance of simCode: created event and clocks part: time 1.045e-05/4.881, allocations: 4.656 kB / 1.492 GB, free: 103 MB / 0.5417 GB Notification: Performance of simCode: created simulation system equations: time 0.03238/4.913, allocations: 14.6 MB / 1.507 GB, free: 102.3 MB / 0.5417 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.01128/4.925, allocations: 1.371 MB / 1.508 GB, free: 102.3 MB / 0.5417 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.06235/4.987, allocations: 31.63 MB / 1.539 GB, free: 96.68 MB / 0.5417 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.01677/5.004, allocations: 9.211 MB / 1.548 GB, free: 95.41 MB / 0.5417 GB Notification: Performance of simCode: alias equations: time 0.01465/5.019, allocations: 4.828 MB / 1.553 GB, free: 95.05 MB / 0.5417 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.003636/5.022, allocations: 0.6848 MB / 1.553 GB, free: 95.03 MB / 0.5417 GB Notification: Performance of SimCode: time 1.353e-06/5.022, allocations: 0 / 1.553 GB, free: 95.03 MB / 0.5417 GB Notification: Performance of Templates: time 0.6328/5.655, allocations: 159.4 MB / 1.709 GB, free: 88.09 MB / 0.5417 GB make -j1 -f ModelicaTest_3.2.2_ModelicaTest.MultiBody.InitializationConversion.Joints.makefile (rm -f ModelicaTest_3.2.2_ModelicaTest.MultiBody.InitializationConversion.Joints.pipe ; mkfifo ModelicaTest_3.2.2_ModelicaTest.MultiBody.InitializationConversion.Joints.pipe ; head -c 1048576 < ModelicaTest_3.2.2_ModelicaTest.MultiBody.InitializationConversion.Joints.pipe >> ../files/ModelicaTest_3.2.2_ModelicaTest.MultiBody.InitializationConversion.Joints.sim & ./ModelicaTest_3.2.2_ModelicaTest.MultiBody.InitializationConversion.Joints -abortSlowSimulation -alarm=480 -lv LOG_STATS > ModelicaTest_3.2.2_ModelicaTest.MultiBody.InitializationConversion.Joints.pipe 2>&1)