Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_8_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.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.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity") translateModel(Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity,tolerance=1e-06,outputFormat="empty",numberOfIntervals=5000,variableFilter="",fileNamePrefix="Buildings_8_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.0009708/0.0009709, allocations: 100.8 kB / 15.71 MB, free: 460 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001631/0.001631, allocations: 173.7 kB / 16.58 MB, free: 6.145 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 3.2.3+maint.om/package.mo): time 1.751/1.751, allocations: 205.4 MB / 222.8 MB, free: 5.641 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 1.848/1.848, allocations: 292.7 MB / 0.5505 GB, free: 14.54 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 0.0005931/0.0005931, allocations: 18.03 kB / 0.6744 GB, free: 26.12 MB / 0.5294 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3355/0.3361, allocations: 116.3 MB / 0.7879 GB, free: 11.94 MB / 0.6075 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity): time 0.03351/0.3697, allocations: 29.06 MB / 0.8163 GB, free: 14.78 MB / 0.6387 GB Notification: Performance of NFInst.instExpressions: time 0.009969/0.3797, allocations: 4.957 MB / 0.8211 GB, free: 9.816 MB / 0.6387 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001549/0.3814, allocations: 31.81 kB / 0.8212 GB, free: 9.785 MB / 0.6387 GB Notification: Performance of NFTyping.typeComponents: time 0.001417/0.3828, allocations: 282.2 kB / 0.8214 GB, free: 9.508 MB / 0.6387 GB Notification: Performance of NFTyping.typeBindings: time 0.003967/0.3868, allocations: 1.121 MB / 0.8225 GB, free: 8.383 MB / 0.6387 GB Notification: Performance of NFTyping.typeClassSections: time 0.002377/0.3892, allocations: 0.6365 MB / 0.8232 GB, free: 7.754 MB / 0.6387 GB Notification: Performance of NFFlatten.flatten: time 0.003918/0.3931, allocations: 2.424 MB / 0.8255 GB, free: 5.32 MB / 0.6387 GB Notification: Performance of NFFlatten.resolveConnections: time 0.0009245/0.394, allocations: 449.3 kB / 0.8259 GB, free: 4.871 MB / 0.6387 GB Notification: Performance of NFEvalConstants.evaluate: time 0.001527/0.3956, allocations: 0.6339 MB / 0.8266 GB, free: 4.234 MB / 0.6387 GB Notification: Performance of NFSimplifyModel.simplify: time 0.00078/0.3964, allocations: 0.5016 MB / 0.8271 GB, free: 3.73 MB / 0.6387 GB Notification: Performance of NFPackage.collectConstants: time 6.1e-05/0.3964, allocations: 23.94 kB / 0.8271 GB, free: 3.707 MB / 0.6387 GB Notification: Performance of NFFlatten.collectFunctions: time 0.002452/0.3989, allocations: 0.8732 MB / 0.8279 GB, free: 2.832 MB / 0.6387 GB Notification: Performance of NFScalarize.scalarize: time 0.0001712/0.3991, allocations: 123.5 kB / 0.8281 GB, free: 2.711 MB / 0.6387 GB Notification: Performance of NFVerifyModel.verify: time 0.0002363/0.3993, allocations: 161.3 kB / 0.8282 GB, free: 2.547 MB / 0.6387 GB Notification: Performance of NFConvertDAE.convert: time 0.001469/0.4008, allocations: 0.9976 MB / 0.8292 GB, free: 1.547 MB / 0.6387 GB Notification: Performance of FrontEnd - DAE generated: time 9.618e-06/0.4008, allocations: 3.984 kB / 0.8292 GB, free: 1.543 MB / 0.6387 GB Notification: Performance of FrontEnd: time 2.274e-06/0.4008, allocations: 0 / 0.8292 GB, free: 1.543 MB / 0.6387 GB Notification: Performance of Transformations before backend: time 8.215e-06/0.4009, allocations: 0 / 0.8292 GB, free: 1.543 MB / 0.6387 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 110 * Number of variables: 110 Notification: Performance of Generate backend data structure: time 0.001502/0.4024, allocations: 0.9579 MB / 0.8301 GB, free: 0.5352 MB / 0.6387 GB Notification: Performance of prepare preOptimizeDAE: time 4.62e-05/0.4024, allocations: 8.031 kB / 0.8301 GB, free: 0.5273 MB / 0.6387 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.002161/0.4046, allocations: 282.7 kB / 0.8304 GB, free: 256 kB / 0.6387 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001278/0.4059, allocations: 0.639 MB / 0.831 GB, free: 15.57 MB / 0.6544 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 4.041e-05/0.4059, allocations: 36.94 kB / 0.8311 GB, free: 15.53 MB / 0.6544 GB Notification: Performance of preOpt expandDerOperator (simulation): time 8.281e-05/0.406, allocations: 44 kB / 0.8311 GB, free: 15.48 MB / 0.6544 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.0009462/0.407, allocations: 0.5243 MB / 0.8316 GB, free: 14.92 MB / 0.6544 GB Notification: Performance of preOpt findStateOrder (simulation): time 2.045e-05/0.407, allocations: 3.953 kB / 0.8316 GB, free: 14.92 MB / 0.6544 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 4.81e-05/0.4071, allocations: 20 kB / 0.8316 GB, free: 14.9 MB / 0.6544 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 1.238e-05/0.4071, allocations: 12 kB / 0.8316 GB, free: 14.89 MB / 0.6544 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.0006703/0.4077, allocations: 351.7 kB / 0.832 GB, free: 14.54 MB / 0.6544 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 0.00326/0.411, allocations: 2.826 MB / 0.8347 GB, free: 11.48 MB / 0.6544 GB Notification: Performance of preOpt comSubExp (simulation): time 0.0005279/0.4116, allocations: 300.4 kB / 0.835 GB, free: 11.18 MB / 0.6544 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.0002568/0.4118, allocations: 154.2 kB / 0.8352 GB, free: 11.02 MB / 0.6544 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0005548/0.4124, allocations: 0.6534 MB / 0.8358 GB, free: 10.22 MB / 0.6544 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.643e-05/0.4124, allocations: 42.78 kB / 0.8359 GB, free: 10.17 MB / 0.6544 GB Notification: Performance of pre-optimization done (n=28): time 2.204e-06/0.4124, allocations: 0 / 0.8359 GB, free: 10.17 MB / 0.6544 GB Notification: Performance of matching and sorting (n=40): time 0.006039/0.4185, allocations: 2.084 MB / 0.8379 GB, free: 8 MB / 0.6544 GB Notification: Performance of inlineWhenForInitialization (initialization): time 6.873e-05/0.4186, allocations: 88.98 kB / 0.838 GB, free: 7.895 MB / 0.6544 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.0007568/0.4193, allocations: 0.4951 MB / 0.8385 GB, free: 7.391 MB / 0.6544 GB Notification: Performance of collectPreVariables (initialization): time 5e-05/0.4194, allocations: 33.7 kB / 0.8385 GB, free: 7.352 MB / 0.6544 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002643/0.4197, allocations: 328.3 kB / 0.8388 GB, free: 7.023 MB / 0.6544 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001445/0.4198, allocations: 145.9 kB / 0.8389 GB, free: 6.879 MB / 0.6544 GB Notification: Performance of simplifyInitialFunctions (initialization): time 2.661e-05/0.4199, allocations: 8 kB / 0.8389 GB, free: 6.871 MB / 0.6544 GB Notification: Performance of setup shared object (initialization): time 0.0001996/0.4201, allocations: 366.7 kB / 0.8393 GB, free: 6.504 MB / 0.6544 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.0003449/0.4204, allocations: 169 kB / 0.8395 GB, free: 6.34 MB / 0.6544 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.000488/0.4209, allocations: 283.3 kB / 0.8397 GB, free: 6.016 MB / 0.6544 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.0004221/0.4213, allocations: 208.3 kB / 0.8399 GB, free: 5.812 MB / 0.6544 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 2.043e-06/0.4214, allocations: 0 / 0.8399 GB, free: 5.812 MB / 0.6544 GB Notification: Performance of matching and sorting (n=55) (initialization): time 0.001698/0.4231, allocations: 0.732 MB / 0.8406 GB, free: 5.066 MB / 0.6544 GB Notification: Performance of prepare postOptimizeDAE: time 0.0001458/0.4232, allocations: 188.3 kB / 0.8408 GB, free: 4.836 MB / 0.6544 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.168e-05/0.4232, allocations: 4 kB / 0.8408 GB, free: 4.832 MB / 0.6544 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0009852/0.4242, allocations: 277.5 kB / 0.8411 GB, free: 4.555 MB / 0.6544 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0003088/0.4246, allocations: 67.91 kB / 0.8412 GB, free: 4.488 MB / 0.6544 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.006632/0.4312, allocations: 4.314 MB / 0.8454 GB, free: 15.91 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001054/0.4323, allocations: 91.75 kB / 0.8455 GB, free: 15.82 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.793e-05/0.4323, allocations: 19.94 kB / 0.8455 GB, free: 15.8 MB / 0.67 GB Notification: Performance of prepare postOptimizeDAE: time 1.087e-05/0.4324, allocations: 6.969 kB / 0.8455 GB, free: 15.8 MB / 0.67 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.001613/0.434, allocations: 0.6607 MB / 0.8461 GB, free: 15.13 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 6.963e-06/0.434, allocations: 4 kB / 0.8461 GB, free: 15.12 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.0008974/0.4349, allocations: 285.6 kB / 0.8464 GB, free: 14.84 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.0002577/0.4352, allocations: 63.91 kB / 0.8465 GB, free: 14.78 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.00628/0.4415, allocations: 4.33 MB / 0.8507 GB, free: 10.18 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001097/0.4426, allocations: 83.83 kB / 0.8508 GB, free: 10.1 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 4.297e-05/0.4426, allocations: 23.98 kB / 0.8508 GB, free: 10.07 MB / 0.67 GB Notification: Model statistics after passing the back-end for initialization: * 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 initialization (39): * Single equations (assignments): 37 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 2 {2 8,2 6} Notification: Performance of prepare postOptimizeDAE: time 0.000499/0.4431, allocations: 285.8 kB / 0.8511 GB, free: 9.785 MB / 0.67 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.000144/0.4433, allocations: 67.19 kB / 0.8511 GB, free: 9.719 MB / 0.67 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.001666/0.445, allocations: 0.6514 MB / 0.8518 GB, free: 9.059 MB / 0.67 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 6.652e-06/0.445, allocations: 7.938 kB / 0.8518 GB, free: 9.051 MB / 0.67 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 2.935e-06/0.445, allocations: 8.078 kB / 0.8518 GB, free: 9.043 MB / 0.67 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 0.001552/0.4466, allocations: 0.7492 MB / 0.8525 GB, free: 8.238 MB / 0.67 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.003105/0.4497, allocations: 1.694 MB / 0.8542 GB, free: 6.477 MB / 0.67 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 4.017e-06/0.4497, allocations: 0 / 0.8542 GB, free: 6.477 MB / 0.67 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.0002285/0.4499, allocations: 55.91 kB / 0.8542 GB, free: 6.422 MB / 0.67 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.0008864/0.4508, allocations: 253.5 kB / 0.8545 GB, free: 6.168 MB / 0.67 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 3.901e-05/0.4509, allocations: 15.98 kB / 0.8545 GB, free: 6.152 MB / 0.67 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.005385/0.4563, allocations: 3.939 MB / 0.8583 GB, free: 1.941 MB / 0.67 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 3.166e-06/0.4563, allocations: 8.016 kB / 0.8583 GB, free: 1.934 MB / 0.67 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.002022/0.4583, allocations: 0.9309 MB / 0.8592 GB, free: 0.9766 MB / 0.67 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0003278/0.4587, allocations: 196.2 kB / 0.8594 GB, free: 0.7656 MB / 0.67 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 7.664e-05/0.4587, allocations: 12.06 kB / 0.8594 GB, free: 0.7539 MB / 0.67 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.0008382/0.4596, allocations: 71.91 kB / 0.8595 GB, free: 0.6836 MB / 0.67 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 8.931e-05/0.4597, allocations: 31.95 kB / 0.8595 GB, free: 0.6523 MB / 0.67 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 3.223e-05/0.4597, allocations: 8 kB / 0.8595 GB, free: 0.6445 MB / 0.67 GB Notification: Performance of sorting global known variables: time 0.0005748/0.4603, allocations: 362.8 kB / 0.8599 GB, free: 300 kB / 0.67 GB Notification: Performance of sort global known variables: time 8.31e-07/0.4603, allocations: 0 / 0.8599 GB, free: 300 kB / 0.67 GB Notification: Performance of remove unused functions: time 0.001704/0.462, allocations: 412 kB / 0.8603 GB, free: 15.89 MB / 0.6856 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 2 * Number of states: 2 (vol.ports[1].h_outflow,vol1.ports[1].h_outflow) * 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 (28): * Single equations (assignments): 26 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (linear and non-linear blocks): 0 * Torn equation systems: 2 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 0 * Non-linear torn systems: 2 {2 6,2 4} Notification: Performance of Backend phase and start with SimCode phase: time 0.0006675/0.4627, allocations: 300.3 kB / 0.8606 GB, free: 15.6 MB / 0.6856 GB Notification: Performance of simCode: created initialization part: time 0.003037/0.4658, allocations: 1.362 MB / 0.8619 GB, free: 14.18 MB / 0.6856 GB Notification: Performance of simCode: created event and clocks part: time 2.986e-06/0.4658, allocations: 0 / 0.8619 GB, free: 14.18 MB / 0.6856 GB Notification: Performance of simCode: created simulation system equations: time 0.001167/0.4669, allocations: 0.5443 MB / 0.8624 GB, free: 13.61 MB / 0.6856 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001609/0.4686, allocations: 353 kB / 0.8628 GB, free: 13.27 MB / 0.6856 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.002396/0.471, allocations: 1.536 MB / 0.8643 GB, free: 11.7 MB / 0.6856 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0006956/0.4717, allocations: 0.9146 MB / 0.8652 GB, free: 10.75 MB / 0.6856 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0001582/0.4719, allocations: 55.42 kB / 0.8652 GB, free: 10.7 MB / 0.6856 GB Notification: Performance of SimCode: time 5.91e-07/0.4719, allocations: 3.938 kB / 0.8652 GB, free: 10.7 MB / 0.6856 GB Notification: Performance of Templates: time 0.02589/0.4978, allocations: 16.91 MB / 0.8817 GB, free: 9.883 MB / 0.7012 GB make -j1 -f Buildings_8_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.makefile make -j1 -f Buildings_8_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensity.makefile clang++ NOTFOUND -Winvalid-pch -O0 -g -DNDEBUG -fPIC -std=c++11 -DBOOST_ALL_DYN_LINK -DUSE_DGESV -DUSE_LOGGER -DOMC_BUILD -DUSE_THREAD -DSUNDIALS_MAJOR_VERSION=5 -DSUNDIALS_MINOR_VERSION=4 -DPMC_USE_SUNDIALS -I"." -I"/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/build/bin/../include/omc/cpp/" -I. -I"." -I"." -I"/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelica/OMCompiler/build/include/omc/c/sundials" -DMEASURETIME_PROFILEBLOCKS -DUSE_LOGGER -c -o OMCppBuildings_8_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensityCalcHelperMain.o OMCppBuildings_8_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensityCalcHelperMain.cpp clang: error: no such file or directory: 'NOTFOUND' make: *** [: OMCppBuildings_8_Buildings.Fluid.MixingVolumes.Validation.CoupledVolumesSpecializedWaterTemperatureDependentDensityCalcHelperMain.o] Error 1