Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Modelica_DeviceDrivers_Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_SharedMemory.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 4.0.0+maint.om/package.mo", uses=false) loadFile("/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_DeviceDrivers 2.1.1-master/package.mo", uses=false) Using package Modelica_DeviceDrivers with version 2.1.1 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_DeviceDrivers 2.1.1-master/package.mo) Using package Modelica with version 4.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+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(Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_SharedMemory,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Modelica_DeviceDrivers_Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_SharedMemory") translateModel(Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_SharedMemory,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Modelica_DeviceDrivers_Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_SharedMemory") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.008207/0.008207, allocations: 93.86 kB / 15.91 MB, free: 6.285 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001875/0.001875, allocations: 196.4 kB / 16.84 MB, free: 6.199 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.443/1.443, allocations: 222.9 MB / 240.5 MB, free: 4.625 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica_DeviceDrivers 2.1.1-master/package.mo): time 0.1702/0.1702, allocations: 12.01 MB / 302.7 MB, free: 1 MB / 238.1 MB Notification: Performance of FrontEnd - loaded program: time 0.001944/0.001944, allocations: 59.91 kB / 365.8 MB, free: 10.06 MB / 302.1 MB Notification: Performance of FrontEnd - Absyn->SCode: time 0.1134/0.1154, allocations: 52.32 MB / 418.1 MB, free: 5.703 MB / 350.1 MB Notification: Performance of NFInst.instantiate(Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_SharedMemory): time 0.004883/0.1203, allocations: 2.729 MB / 420.8 MB, free: 2.953 MB / 350.1 MB Notification: Performance of NFInst.instExpressions: time 0.001335/0.1216, allocations: 0.7085 MB / 421.5 MB, free: 2.242 MB / 350.1 MB Notification: Performance of NFInst.updateImplicitVariability: time 9.412e-05/0.1218, allocations: 3.938 kB / 421.5 MB, free: 2.238 MB / 350.1 MB Notification: Performance of NFTyping.typeComponents: time 0.0002896/0.1221, allocations: 47.64 kB / 421.6 MB, free: 2.191 MB / 350.1 MB Notification: Performance of NFTyping.typeBindings: time 0.0001532/0.1223, allocations: 43.72 kB / 421.6 MB, free: 2.148 MB / 350.1 MB Notification: Performance of NFTyping.typeClassSections: time 0.0004898/0.1228, allocations: 179.7 kB / 421.8 MB, free: 1.973 MB / 350.1 MB Notification: Performance of NFFlatten.flatten: time 0.0003431/0.1231, allocations: 283.3 kB / 422.1 MB, free: 1.695 MB / 350.1 MB Notification: Performance of NFFlatten.resolveConnections: time 0.0003284/0.1234, allocations: 184.6 kB / 422.3 MB, free: 1.516 MB / 350.1 MB Notification: Performance of NFEvalConstants.evaluate: time 0.0001516/0.1236, allocations: 135.4 kB / 422.4 MB, free: 1.383 MB / 350.1 MB Notification: Performance of NFSimplifyModel.simplify: time 0.0002476/0.1239, allocations: 159.3 kB / 422.6 MB, free: 1.227 MB / 350.1 MB Notification: Performance of NFPackage.collectConstants: time 4.99e-05/0.1239, allocations: 27.94 kB / 422.6 MB, free: 1.199 MB / 350.1 MB Notification: Performance of NFFlatten.collectFunctions: time 0.0002514/0.1242, allocations: 135.9 kB / 422.7 MB, free: 1.066 MB / 350.1 MB Notification: Performance of NFScalarize.scalarize: time 0.0001295/0.1243, allocations: 99.7 kB / 422.8 MB, free: 0.9688 MB / 350.1 MB Notification: Performance of NFVerifyModel.verify: time 0.0001645/0.1245, allocations: 155.1 kB / 423 MB, free: 0.8164 MB / 350.1 MB Notification: Performance of NFConvertDAE.convert: time 0.0005409/0.125, allocations: 470.9 kB / 423.4 MB, free: 364 kB / 350.1 MB Notification: Performance of FrontEnd - DAE generated: time 6.722e-06/0.1251, allocations: 0 / 423.4 MB, free: 364 kB / 350.1 MB Notification: Performance of FrontEnd: time 1.152e-06/0.1251, allocations: 0 / 423.4 MB, free: 364 kB / 350.1 MB Notification: Performance of Transformations before backend: time 1.025e-05/0.1251, allocations: 0 / 423.4 MB, free: 364 kB / 350.1 MB Warning: Alias equations of external objects are not Modelica compliant as in: getReal.pkgOut[1].pkg = getReal.pkgIn.pkg addInteger.pkgOut[1].pkg = addInteger.pkgIn.pkg addReal.pkgOut[1].pkg = addReal.pkgIn.pkg getReal.pkgOut[1].pkg = getInteger.pkgIn.pkg sharedMemoryRead.pkgOut.pkg = getReal.pkgIn.pkg addInteger.pkgOut[1].pkg = sharedMemoryWrite.pkgIn.pkg addReal.pkgOut[1].pkg = addInteger.pkgIn.pkg packager.pkgOut.pkg = addReal.pkgIn.pkg Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 78 * Number of variables: 78 Notification: Performance of Generate backend data structure: time 0.1898/0.3149, allocations: 0.8387 MB / 424.3 MB, free: 41.65 MB / 350.1 MB Notification: Performance of prepare preOptimizeDAE: time 3.69e-05/0.3149, allocations: 12.38 kB / 424.3 MB, free: 41.65 MB / 350.1 MB Notification: Performance of preOpt normalInlineFunction (simulation): time 8.986e-05/0.315, allocations: 36.53 kB / 424.3 MB, free: 41.63 MB / 350.1 MB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0002543/0.3153, allocations: 290.6 kB / 424.6 MB, free: 41.41 MB / 350.1 MB Notification: Performance of preOpt simplifyIfEquations (simulation): time 2.566e-05/0.3153, allocations: 22.72 kB / 424.6 MB, free: 41.41 MB / 350.1 MB Notification: Performance of preOpt expandDerOperator (simulation): time 4.525e-05/0.3154, allocations: 31.92 kB / 424.6 MB, free: 41.41 MB / 350.1 MB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0005537/0.3159, allocations: 369.4 kB / 425 MB, free: 41.32 MB / 350.1 MB Notification: Performance of preOpt findStateOrder (simulation): time 1.572e-05/0.316, allocations: 1.281 kB / 425 MB, free: 41.32 MB / 350.1 MB Notification: Performance of preOpt replaceEdgeChange (simulation): time 3.481e-05/0.316, allocations: 15.06 kB / 425 MB, free: 41.32 MB / 350.1 MB Notification: Performance of preOpt inlineArrayEqn (simulation): time 9.819e-06/0.316, allocations: 8.094 kB / 425 MB, free: 41.32 MB / 350.1 MB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0003179/0.3163, allocations: 194.6 kB / 425.2 MB, free: 41.32 MB / 350.1 MB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.0009932/0.3173, allocations: 1.177 MB / 426.4 MB, free: 40.59 MB / 350.1 MB Notification: Performance of preOpt comSubExp (simulation): time 0.0003686/0.3177, allocations: 246.3 kB / 426.6 MB, free: 40.5 MB / 350.1 MB Notification: Performance of preOpt resolveLoops (simulation): time 0.0001458/0.3179, allocations: 124.6 kB / 426.8 MB, free: 40.47 MB / 350.1 MB Notification: Performance of preOpt evalFunc (simulation): time 2.944e-05/0.3179, allocations: 10.59 kB / 426.8 MB, free: 40.47 MB / 350.1 MB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.0002468/0.3182, allocations: 208.1 kB / 427 MB, free: 40.39 MB / 350.1 MB Notification: Performance of pre-optimization done (n=31): time 1.713e-06/0.3182, allocations: 3.125 kB / 427 MB, free: 40.39 MB / 350.1 MB Notification: Performance of matching and sorting (n=31): time 0.000735/0.3189, allocations: 460.3 kB / 427.4 MB, free: 40.34 MB / 350.1 MB Notification: Performance of inlineWhenForInitialization (initialization): time 4.887e-05/0.319, allocations: 145.2 kB / 427.6 MB, free: 40.19 MB / 350.1 MB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0001577/0.3192, allocations: 217.8 kB / 427.8 MB, free: 40.07 MB / 350.1 MB Notification: Performance of collectPreVariables (initialization): time 2.314e-05/0.3192, allocations: 36.39 kB / 427.8 MB, free: 40.04 MB / 350.1 MB Notification: Performance of collectInitialEqns (initialization): time 7.767e-05/0.3193, allocations: 169.4 kB / 428 MB, free: 39.93 MB / 350.1 MB Notification: Performance of collectInitialBindings (initialization): time 4.998e-05/0.3193, allocations: 76.31 kB / 428.1 MB, free: 39.89 MB / 350.1 MB Notification: Performance of simplifyInitialFunctions (initialization): time 0.0001072/0.3194, allocations: 96.27 kB / 428.1 MB, free: 39.88 MB / 350.1 MB Notification: Performance of setup shared object (initialization): time 5.307e-05/0.3195, allocations: 342.3 kB / 428.5 MB, free: 39.56 MB / 350.1 MB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0001537/0.3197, allocations: 95.34 kB / 428.6 MB, free: 39.55 MB / 350.1 MB Notification: Performance of partitionIndependentBlocks (initialization): time 0.0001809/0.3198, allocations: 242.2 kB / 428.8 MB, free: 39.38 MB / 350.1 MB Notification: Performance of analyzeInitialSystem (initialization): time 0.0003549/0.3202, allocations: 368.2 kB / 429.2 MB, free: 39.2 MB / 350.1 MB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.356e-06/0.3202, allocations: 4 kB / 429.2 MB, free: 39.2 MB / 350.1 MB Notification: Performance of matching and sorting (n=49) (initialization): time 0.0004943/0.3207, allocations: 383.3 kB / 429.5 MB, free: 39.15 MB / 350.1 MB Notification: Performance of prepare postOptimizeDAE: time 1.515e-05/0.3207, allocations: 5.906 kB / 429.6 MB, free: 39.15 MB / 350.1 MB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 8.556e-06/0.3208, allocations: 12.98 kB / 429.6 MB, free: 39.15 MB / 350.1 MB Notification: Performance of postOpt tearingSystem (initialization): time 1.811e-05/0.3208, allocations: 7.781 kB / 429.6 MB, free: 39.15 MB / 350.1 MB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0001791/0.321, allocations: 54.34 kB / 429.6 MB, free: 39.15 MB / 350.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 1.389e-05/0.321, allocations: 18.31 kB / 429.6 MB, free: 39.14 MB / 350.1 MB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.0001285/0.3211, allocations: 31.84 kB / 429.7 MB, free: 39.13 MB / 350.1 MB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 2.324e-05/0.3211, allocations: 17.56 kB / 429.7 MB, free: 39.13 MB / 350.1 MB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 22 * Number of states: 0 () * Number of discrete variables: 42 (sharedMemoryWrite.dummy,$PRE.sharedMemoryWrite.dummy,addInteger.pkgOut[1].dummy,$PRE.addInteger.pkgOut[1].dummy,addReal.pkgOut[1].dummy,$PRE.addReal.pkgOut[1].dummy,packager.pkgOut.dummy,$PRE.packager.pkgOut.dummy,addInteger.pkgOut[1].backwardTrigger,addInteger.pkgOut[1].trigger,$whenCondition2,addInteger.u[1],sharedMemoryRead.pkgOut.dummy,$PRE.sharedMemoryRead.pkgOut.dummy,getInteger.dummy,$PRE.getInteger.dummy,getInteger.y[1],$PRE.getInteger.y[1],getReal.dummy,$PRE.getReal.dummy,getReal.y[3],$PRE.getReal.y[3],getReal.y[2],$PRE.getReal.y[2],getReal.y[1],$PRE.getReal.y[1],getReal.pkgOut[1].dummy,$PRE.getReal.pkgOut[1].dummy,getReal.pkgOut[1].trigger,$whenCondition1,getInteger.pkgIn.userPkgBitSize,getInteger.pkgIn.backwardTrigger,sharedMemoryRead.bufferSize,getInteger.pkgIn.autoPkgBitSize,getReal.pkgIn.autoPkgBitSize,sharedMemoryWrite.pkgIn.autoPkgBitSize,sharedMemoryWrite.pkgIn.userPkgBitSize,addInteger.pkgIn.autoPkgBitSize,addReal.pkgIn.autoPkgBitSize,packager.bufferSize,packager.backwardPropagatedBufferSize,sharedMemoryWrite.bufferSize) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (49): * Single equations (assignments): 49 * 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 0.0001619/0.3213, allocations: 206.3 kB / 429.9 MB, free: 39 MB / 350.1 MB Notification: Performance of postOpt lateInlineFunction (simulation): time 4.129e-05/0.3214, allocations: 21.25 kB / 429.9 MB, free: 39 MB / 350.1 MB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.0002909/0.3217, allocations: 196.1 kB / 430.1 MB, free: 38.96 MB / 350.1 MB Notification: Performance of postOpt inlineArrayEqn (simulation): time 5.14e-06/0.3217, allocations: 5.562 kB / 430.1 MB, free: 38.96 MB / 350.1 MB Notification: Performance of postOpt constantLinearSystem (simulation): time 6.121e-06/0.3217, allocations: 3.938 kB / 430.1 MB, free: 38.96 MB / 350.1 MB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.86e-06/0.3217, allocations: 0 / 430.1 MB, free: 38.96 MB / 350.1 MB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.0007678/0.3225, allocations: 0.8405 MB / 431 MB, free: 38.47 MB / 350.1 MB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.054e-06/0.3225, allocations: 0 / 431 MB, free: 38.47 MB / 350.1 MB Notification: Performance of postOpt solveSimpleEquations (simulation): time 4.335e-05/0.3225, allocations: 9.969 kB / 431 MB, free: 38.47 MB / 350.1 MB Notification: Performance of postOpt tearingSystem (simulation): time 2.936e-06/0.3225, allocations: 2.906 kB / 431 MB, free: 38.47 MB / 350.1 MB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 2.111e-05/0.3226, allocations: 8.938 kB / 431 MB, free: 38.47 MB / 350.1 MB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 3.146e-06/0.3226, allocations: 2.906 kB / 431 MB, free: 38.47 MB / 350.1 MB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 2.515e-06/0.3226, allocations: 6.141 kB / 431 MB, free: 38.47 MB / 350.1 MB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.0005046/0.3231, allocations: 0.5343 MB / 431.5 MB, free: 38.15 MB / 350.1 MB Notification: Performance of postOpt removeConstants (simulation): time 3.017e-05/0.3231, allocations: 106.3 kB / 431.6 MB, free: 38.04 MB / 350.1 MB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 3.471e-05/0.3232, allocations: 8.25 kB / 431.6 MB, free: 38.03 MB / 350.1 MB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0001317/0.3233, allocations: 6.688 kB / 431.6 MB, free: 38.03 MB / 350.1 MB Notification: Performance of postOpt findZeroCrossings (simulation): time 4.398e-05/0.3234, allocations: 16.72 kB / 431.7 MB, free: 38.03 MB / 350.1 MB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 2.921e-05/0.3234, allocations: 12.88 kB / 431.7 MB, free: 38.03 MB / 350.1 MB Notification: Performance of sorting global known variables: time 6.207e-05/0.3235, allocations: 127 kB / 431.8 MB, free: 37.94 MB / 350.1 MB Notification: Performance of sort global known variables: time 1.2e-07/0.3235, allocations: 0 / 431.8 MB, free: 37.94 MB / 350.1 MB Notification: Performance of remove unused functions: time 0.000467/0.3239, allocations: 117.7 kB / 431.9 MB, free: 37.91 MB / 350.1 MB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 4 * Number of states: 0 () * Number of discrete variables: 28 (getReal.pkgOut[1].trigger,$whenCondition1,getReal.pkgOut[1].dummy,getReal.y[1],getReal.y[2],getReal.y[3],getReal.dummy,getInteger.y[1],getInteger.dummy,sharedMemoryRead.pkgOut.dummy,getReal.pkgIn.autoPkgBitSize,getInteger.pkgIn.autoPkgBitSize,sharedMemoryRead.bufferSize,addInteger.pkgOut[1].trigger,$whenCondition2,packager.pkgOut.dummy,addReal.pkgOut[1].dummy,addInteger.pkgOut[1].dummy,addInteger.pkgOut[1].backwardTrigger,addInteger.u[1],sharedMemoryWrite.bufferSize,sharedMemoryWrite.dummy,packager.backwardPropagatedBufferSize,packager.bufferSize,addReal.pkgIn.autoPkgBitSize,addInteger.pkgIn.autoPkgBitSize,sharedMemoryWrite.pkgIn.userPkgBitSize,sharedMemoryWrite.pkgIn.autoPkgBitSize) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (27): * Single equations (assignments): 9 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 18 * 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 0.0006955/0.3246, allocations: 305.4 kB / 432.2 MB, free: 37.8 MB / 350.1 MB Notification: Performance of simCode: created initialization part: time 0.0004019/0.3251, allocations: 280.9 kB / 432.5 MB, free: 37.73 MB / 350.1 MB Notification: Performance of simCode: created event and clocks part: time 2.194e-06/0.3251, allocations: 0 / 432.5 MB, free: 37.73 MB / 350.1 MB Notification: Performance of simCode: created simulation system equations: time 0.0001775/0.3253, allocations: 129.6 kB / 432.6 MB, free: 37.69 MB / 350.1 MB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.0004895/0.3257, allocations: 47.39 kB / 432.7 MB, free: 37.68 MB / 350.1 MB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.0008772/0.3266, allocations: 0.6695 MB / 433.3 MB, free: 37.24 MB / 350.1 MB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.000178/0.3268, allocations: 0.7747 MB / 434.1 MB, free: 36.54 MB / 350.1 MB Notification: Performance of simCode: alias equations: time 9.719e-05/0.3269, allocations: 39.14 kB / 434.1 MB, free: 36.53 MB / 350.1 MB Notification: Performance of simCode: all other stuff during SimCode phase: time 4.607e-05/0.327, allocations: 22.34 kB / 434.2 MB, free: 36.52 MB / 350.1 MB Notification: Performance of SimCode: time 2.81e-07/0.327, allocations: 0 / 434.2 MB, free: 36.52 MB / 350.1 MB Notification: Performance of Templates: time 0.006859/0.3339, allocations: 3.85 MB / 438 MB, free: 36.16 MB / 350.1 MB make -j1 -f Modelica_DeviceDrivers_Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_SharedMemory.makefile (rm -f Modelica_DeviceDrivers_Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_SharedMemory.pipe ; mkfifo Modelica_DeviceDrivers_Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_SharedMemory.pipe ; head -c 1048576 < Modelica_DeviceDrivers_Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_SharedMemory.pipe >> ../files/Modelica_DeviceDrivers_Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_SharedMemory.sim & ./Modelica_DeviceDrivers_Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_SharedMemory -abortSlowSimulation -alarm=480 -lv LOG_STATS > Modelica_DeviceDrivers_Modelica_DeviceDrivers.Blocks.Examples.TestSerialPackager_SharedMemory.pipe 2>&1)