Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Modelica_4.1.0-beta.om_Modelica.Mechanics.MultiBody.Examples.Constraints.RevoluteConstraint.conf.json loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0-beta.om/package.mo", uses=false) Using package Modelica with version 4.1.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0-beta.om/package.mo) Using package Complex with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo) Using package ModelicaServices with version trunk (/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo) Running command: "" <> buildModelFMU(Modelica.Mechanics.MultiBody.Examples.Constraints.RevoluteConstraint,fileNamePrefix="Modelica_4_1_0-beta_om_Modelica_Mechanics_MultiBody_Examples_Constraints_RevoluteConstraint",fmuType="me",version="2.0",platforms={"static"}) "" <> buildModelFMU(Modelica.Mechanics.MultiBody.Examples.Constraints.RevoluteConstraint,fileNamePrefix="Modelica_4_1_0-beta_om_Modelica_Mechanics_MultiBody_Examples_Constraints_RevoluteConstraint",fmuType="me",version="2.0",platforms={"static"}) Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices trunk/package.mo): time 0.001444/0.001444, allocations: 104.4 kB / 17.63 MB, free: 5.344 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex trunk/package.mo): time 0.00233/0.00233, allocations: 214.4 kB / 18.59 MB, free: 4.402 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.1.0-beta.om/package.mo): time 1.472/1.472, allocations: 227.7 MB / 247 MB, free: 10.3 MB / 206.1 MB Warning: Requested package Modelica of version trunk, but this package was already loaded with version 4.1.0. OpenModelica cannot reason about compatibility between the two packages since they are not semantic versions. Warning: Requested package Complex of version 4.1.0, but this package was already loaded with version trunk. OpenModelica cannot reason about compatibility between the two packages since they are not semantic versions. Warning: Requested package ModelicaServices of version 4.1.0, but this package was already loaded with version trunk. OpenModelica cannot reason about compatibility between the two packages since they are not semantic versions. Notification: Performance of FrontEnd - loaded program: time 0.001934/0.001934, allocations: 69.08 kB / 307.3 MB, free: 388 kB / 238.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.106/0.1079, allocations: 50.54 MB / 357.9 MB, free: 13.82 MB / 302.1 MB Notification: Performance of NFInst.instantiate(Modelica.Mechanics.MultiBody.Examples.Constraints.RevoluteConstraint): time 0.1841/0.2921, allocations: 18.68 MB / 376.6 MB, free: 9.113 MB / 302.1 MB Notification: Performance of NFInst.instExpressions: time 0.01171/0.3039, allocations: 6.151 MB / 382.7 MB, free: 7.68 MB / 302.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 0.003447/0.3074, allocations: 147.8 kB / 382.9 MB, free: 7.648 MB / 302.1 MB Notification: Performance of NFTyping.typeComponents: time 0.009859/0.3173, allocations: 6.02 MB / 388.9 MB, free: 5.211 MB / 302.1 MB Notification: Performance of NFTyping.typeBindings: time 0.006682/0.324, allocations: 2.539 MB / 391.4 MB, free: 3.922 MB / 302.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.004608/0.3286, allocations: 2.383 MB / 393.8 MB, free: 2.293 MB / 302.1 MB Notification: Performance of NFFlatten.flatten: time 0.01007/0.3387, allocations: 6.661 MB / 400.5 MB, free: 14.9 MB / 318.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.01174/0.3505, allocations: 8.091 MB / 408.5 MB, free: 8.371 MB / 318.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.006114/0.3567, allocations: 2.832 MB / 411.4 MB, free: 5.531 MB / 318.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.005971/0.3627, allocations: 3.505 MB / 414.9 MB, free: 2.016 MB / 318.1 MB Notification: Performance of NFPackage.collectConstants: time 0.002269/0.365, allocations: 0.6328 MB / 415.5 MB, free: 1.383 MB / 318.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.005506/0.3705, allocations: 1.834 MB / 417.4 MB, free: 15.55 MB / 334.1 MB Notification: Performance of NFScalarize.scalarize: time 0.004702/0.3752, allocations: 3.266 MB / 420.6 MB, free: 12.27 MB / 334.1 MB Notification: Performance of NFVerifyModel.verify: time 0.006221/0.3815, allocations: 3.737 MB / 424.4 MB, free: 8.512 MB / 334.1 MB Notification: Performance of NFConvertDAE.convert: time 0.01437/0.3959, allocations: 11.58 MB / 435.9 MB, free: 12.89 MB / 350.1 MB Notification: Performance of FrontEnd - DAE generated: time 6.613e-06/0.3959, allocations: 0 / 435.9 MB, free: 12.89 MB / 350.1 MB Notification: Performance of FrontEnd: time 2.024e-06/0.3959, allocations: 0 / 435.9 MB, free: 12.89 MB / 350.1 MB Notification: Performance of Transformations before backend: time 0.0003072/0.3962, allocations: 0 / 435.9 MB, free: 12.89 MB / 350.1 MB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 2312 * Number of variables: 2312 Notification: Performance of Generate backend data structure: time 0.02119/0.4175, allocations: 8.267 MB / 444.2 MB, free: 4.543 MB / 350.1 MB Notification: Performance of prepare preOptimizeDAE: time 5.223e-05/0.4175, allocations: 12.03 kB / 444.2 MB, free: 4.531 MB / 350.1 MB Notification: Performance of preOpt introduceOutputAliases (simulation): time 0.002448/0.42, allocations: 1.115 MB / 445.3 MB, free: 3.406 MB / 350.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.008246/0.4282, allocations: 2.246 MB / 447.6 MB, free: 1.148 MB / 350.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.008963/0.4372, allocations: 4.43 MB / 452 MB, free: 12.64 MB / 366.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0003729/0.4376, allocations: 431 kB / 452.4 MB, free: 12.21 MB / 366.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 0.001636/0.4393, allocations: 0.566 MB / 453 MB, free: 11.65 MB / 366.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.03334/0.4726, allocations: 16.35 MB / 469.3 MB, free: 10.4 MB / 382.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 0.0002113/0.4729, allocations: 63.38 kB / 469.4 MB, free: 10.34 MB / 382.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0008683/0.4738, allocations: 263.8 kB / 469.7 MB, free: 10.08 MB / 382.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.004217/0.478, allocations: 2.51 MB / 472.2 MB, free: 7.566 MB / 382.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.02985/0.5078, allocations: 13.98 MB / 486.2 MB, free: 9.559 MB / 398.1 MB 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 0.4081/0.916, allocations: 61.96 MB / 0.5353 GB, free: 104.7 MB / 446.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.02324/0.9393, allocations: 7.584 MB / 0.5427 GB, free: 104 MB / 446.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.004915/0.9443, allocations: 3.937 MB / 0.5465 GB, free: 104 MB / 446.1 MB Notification: Performance of preOpt evalFunc (simulation): time 0.02174/0.966, allocations: 16.66 MB / 0.5628 GB, free: 95.83 MB / 446.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.393e-05/0.9661, allocations: 55.69 kB / 0.5628 GB, free: 95.78 MB / 446.1 MB Notification: Performance of pre-optimization done (n=265): time 5.971e-06/0.9661, allocations: 0 / 0.5628 GB, free: 95.78 MB / 446.1 MB Notification: Performance of matching and sorting (n=331): time 0.1118/1.078, allocations: 42.5 MB / 0.6043 GB, free: 62.41 MB / 446.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 0.01899/1.097, allocations: 16.72 MB / 0.6207 GB, free: 45.2 MB / 446.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.00682/1.104, allocations: 5.618 MB / 0.6262 GB, free: 39.61 MB / 446.1 MB Notification: Performance of collectPreVariables (initialization): time 0.0008122/1.105, allocations: 81.3 kB / 0.6262 GB, free: 39.52 MB / 446.1 MB Notification: Performance of collectInitialEqns (initialization): time 0.00206/1.107, allocations: 4.607 MB / 0.6307 GB, free: 34.91 MB / 446.1 MB Notification: Performance of collectInitialBindings (initialization): time 0.001439/1.108, allocations: 1.242 MB / 0.6319 GB, free: 33.68 MB / 446.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.002446/1.111, allocations: 1.874 MB / 0.6338 GB, free: 31.8 MB / 446.1 MB Notification: Performance of setup shared object (initialization): time 4.326e-05/1.111, allocations: 309.1 kB / 0.6341 GB, free: 31.49 MB / 446.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.004619/1.115, allocations: 4.043 MB / 0.638 GB, free: 27.44 MB / 446.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.006391/1.122, allocations: 9.189 MB / 0.647 GB, free: 15.79 MB / 446.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.01322/1.135, allocations: 14.33 MB / 0.661 GB, free: 15.04 MB / 462.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 0.0001398/1.135, allocations: 52 kB / 0.661 GB, free: 14.99 MB / 462.1 MB Notification: Performance of matching and sorting (n=1172) (initialization): time 0.04403/1.179, allocations: 17.33 MB / 0.678 GB, free: 13.59 MB / 478.1 MB Notification: Performance of prepare postOptimizeDAE: time 0.000146/1.179, allocations: 80 kB / 0.678 GB, free: 13.51 MB / 478.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 0.000255/1.18, allocations: 184.1 kB / 0.6782 GB, free: 13.33 MB / 478.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 0.01603/1.196, allocations: 4.582 MB / 0.6827 GB, free: 8.762 MB / 478.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.007306/1.203, allocations: 1.988 MB / 0.6846 GB, free: 6.77 MB / 478.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.05333/1.256, allocations: 36.38 MB / 0.7202 GB, free: 1.438 MB / 0.4982 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.007632/1.264, allocations: 0.5344 MB / 0.7207 GB, free: 0.9023 MB / 0.4982 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.001789/1.266, allocations: 0.5532 MB / 0.7212 GB, free: 360 kB / 0.4982 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 823 * Number of states: 0 () * Number of discrete variables: 62 (sensorConstraintRelative.arrow.twoHeadedArrow,sensorConstraintRelative.arrow.headAtOrigin,freeMotionScalarInit.arrowColor[3],freeMotionScalarInit.arrowColor[2],freeMotionScalarInit.arrowColor[1],fixedTranslation.color[3],fixedTranslation.color[2],fixedTranslation.color[1],fixedRotation.color[3],fixedRotation.color[2],fixedRotation.color[1],world.gravityArrowColor[3],world.gravityArrowColor[2],world.gravityArrowColor[1],world.axisColor_x[3],world.axisColor_x[2],world.axisColor_x[1],world.groundColor[3],world.groundColor[2],world.groundColor[1],world.gravitySphereColor[3],world.gravitySphereColor[2],world.gravitySphereColor[1],springOfConstraint.color[3],springOfConstraint.color[2],springOfConstraint.color[1],springOfConstraint.massColor[3],springOfConstraint.massColor[2],springOfConstraint.massColor[1],springOfJoint.color[3],springOfJoint.color[2],springOfJoint.color[1],springOfJoint.massColor[3],springOfJoint.massColor[2],springOfJoint.massColor[1],bodyOfConstraint.color[3],bodyOfConstraint.color[2],bodyOfConstraint.color[1],bodyOfConstraint.body.sphereColor[3],bodyOfConstraint.body.sphereColor[2],bodyOfConstraint.body.sphereColor[1],bodyOfConstraint.frameTranslation.color[3],bodyOfConstraint.frameTranslation.color[2],bodyOfConstraint.frameTranslation.color[1],bodyOfJoint.color[3],bodyOfJoint.color[2],bodyOfJoint.color[1],bodyOfJoint.body.sphereColor[3],bodyOfJoint.body.sphereColor[2],bodyOfJoint.body.sphereColor[1],bodyOfJoint.frameTranslation.color[3],bodyOfJoint.frameTranslation.color[2],bodyOfJoint.frameTranslation.color[1],sensorConstraintRelative.arrowColor[3],sensorConstraintRelative.arrowColor[2],sensorConstraintRelative.arrowColor[1],constraint.sphereColor[3],constraint.sphereColor[2],constraint.sphereColor[1],joint.cylinderColor[3],joint.cylinderColor[2],joint.cylinderColor[1]) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (1041): * Single equations (assignments): 1028 * Array equations: 6 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 7 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 6 systems {(3,33,100.0%), (2,19,100.0%), (2,13,100.0%), (2,1,100.0%), (2,1,100.0%), (2,1,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(2,19)} Notification: Performance of prepare postOptimizeDAE: time 0.1878/1.454, allocations: 3.177 MB / 0.7243 GB, free: 179.3 MB / 0.4982 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001399/1.455, allocations: 0.5202 MB / 0.7248 GB, free: 179.3 MB / 0.4982 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.02274/1.478, allocations: 9.826 MB / 0.7344 GB, free: 178 MB / 0.4982 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 0.0001019/1.478, allocations: 44.03 kB / 0.7345 GB, free: 178 MB / 0.4982 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 0.01759/1.496, allocations: 8.414 MB / 0.7427 GB, free: 175 MB / 0.4982 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 8.786e-05/1.496, allocations: 23.41 kB / 0.7427 GB, free: 175 MB / 0.4982 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.04138/1.537, allocations: 22.01 MB / 0.7642 GB, free: 166.6 MB / 0.4982 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 3.938e-05/1.537, allocations: 3.562 kB / 0.7642 GB, free: 166.6 MB / 0.4982 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.002567/1.54, allocations: 465 kB / 0.7647 GB, free: 166.6 MB / 0.4982 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.01018/1.55, allocations: 3.236 MB / 0.7678 GB, free: 165.3 MB / 0.4982 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0007026/1.551, allocations: 63.45 kB / 0.7679 GB, free: 165.3 MB / 0.4982 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.02939/1.58, allocations: 26.39 MB / 0.7937 GB, free: 140 MB / 0.4982 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 0.01258/1.593, allocations: 10.76 MB / 0.8042 GB, free: 129.1 MB / 0.4982 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.02248/1.615, allocations: 13.66 MB / 0.8175 GB, free: 115.6 MB / 0.4982 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001278/1.617, allocations: 0.5437 MB / 0.818 GB, free: 115.1 MB / 0.4982 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0009106/1.617, allocations: 52 kB / 0.8181 GB, free: 115.1 MB / 0.4982 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.002999/1.62, allocations: 215.7 kB / 0.8183 GB, free: 114.9 MB / 0.4982 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0007639/1.621, allocations: 227.6 kB / 0.8185 GB, free: 114.6 MB / 0.4982 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0002325/1.621, allocations: 83.98 kB / 0.8186 GB, free: 114.6 MB / 0.4982 GB Notification: Performance of sorting global known variables: time 0.00401/1.626, allocations: 3.504 MB / 0.822 GB, free: 111.1 MB / 0.4982 GB Notification: Performance of sort global known variables: time 2.91e-07/1.626, allocations: 0 / 0.822 GB, free: 111.1 MB / 0.4982 GB Notification: Performance of remove unused functions: time 0.007579/1.633, allocations: 1.939 MB / 0.8239 GB, free: 109.2 MB / 0.4982 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 16 * Number of states: 4 ($STATESET2.x,$STATESET1.x,joint.phi,joint.w) * 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 (210): * Single equations (assignments): 202 * Array equations: 4 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 4 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 3 systems {(1,11,100.0%), (3,30,100.0%), (3,21,100.0%)} * Non-linear torn systems (#iteration vars, #inner vars): 1 system {(3,25)} Notification: Performance of Backend phase and start with SimCode phase: time 0.02143/1.655, allocations: 14.36 MB / 0.8379 GB, free: 94.71 MB / 0.4982 GB Notification: Performance of simCode: created initialization part: time 0.01982/1.674, allocations: 14.14 MB / 0.8517 GB, free: 80.58 MB / 0.4982 GB Notification: Performance of simCode: created event and clocks part: time 1.115e-05/1.674, allocations: 0 / 0.8517 GB, free: 80.58 MB / 0.4982 GB Notification: Performance of simCode: created simulation system equations: time 0.004902/1.679, allocations: 4.11 MB / 0.8558 GB, free: 76.42 MB / 0.4982 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.004247/1.684, allocations: 0.8333 MB / 0.8566 GB, free: 75.61 MB / 0.4982 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.3002/1.984, allocations: 96.59 MB / 0.9509 GB, free: 151 MB / 0.4982 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.006399/1.99, allocations: 4.863 MB / 0.9556 GB, free: 149.4 MB / 0.4982 GB Notification: Performance of simCode: alias equations: time 0.006719/1.997, allocations: 2.724 MB / 0.9583 GB, free: 149.1 MB / 0.4982 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.004242/2.001, allocations: 3.1 MB / 0.9613 GB, free: 146.6 MB / 0.4982 GB Notification: Performance of SimCode: time 9.42e-07/2.001, allocations: 0 / 0.9613 GB, free: 146.6 MB / 0.4982 GB Notification: Performance of buildModelFMU: Generate the FMI files: time 0.3833/2.385, allocations: 143.3 MB / 1.101 GB, free: 161.1 MB / 0.4982 GB Notification: Performance of buildModelFMU: Generate platform static: time 15.32/17.71, allocations: 12.48 kB / 1.101 GB, free: 161.1 MB / 0.4982 GB (rm -f Modelica_4.1.0-beta.om_Modelica.Mechanics.MultiBody.Examples.Constraints.RevoluteConstraint.pipe ; mkfifo Modelica_4.1.0-beta.om_Modelica.Mechanics.MultiBody.Examples.Constraints.RevoluteConstraint.pipe ; head -c 1048576 < Modelica_4.1.0-beta.om_Modelica.Mechanics.MultiBody.Examples.Constraints.RevoluteConstraint.pipe >> ../files/Modelica_4.1.0-beta.om_Modelica.Mechanics.MultiBody.Examples.Constraints.RevoluteConstraint.sim & /home/hudson/saved_omc/OMSimulator/install/bin/OMSimulator -r=Modelica_4.1.0-beta.om_Modelica.Mechanics.MultiBody.Examples.Constraints.RevoluteConstraint_res.mat --tempDir=temp_Modelica_4_1_0-beta_om_Modelica_Mechanics_MultiBody_Examples_Constraints_RevoluteConstraint_fmu --startTime=0 --stopTime=10 --timeout=50 --tolerance=1e-06 Modelica_4_1_0-beta_om_Modelica_Mechanics_MultiBody_Examples_Constraints_RevoluteConstraint.fmu > Modelica_4.1.0-beta.om_Modelica.Mechanics.MultiBody.Examples.Constraints.RevoluteConstraint.pipe 2>&1)