Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_latest_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.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/Buildings 12.0.0-master/package.mo", uses=false) Using package Buildings with version 12.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.0.0-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(Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|hex.QLat_flow|hex.mWat1_flow|hex.mWat2_flow|hex.Q1_flow|hex.Q2_flow|hex.mWat_flow",fileNamePrefix="Buildings_latest_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow") translateModel(Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|hex.QLat_flow|hex.mWat1_flow|hex.mWat2_flow|hex.Q1_flow|hex.Q2_flow|hex.mWat_flow",fileNamePrefix="Buildings_latest_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.00153/0.00153, allocations: 108.2 kB / 15.99 MB, free: 5.891 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001507/0.001508, allocations: 195.9 kB / 16.91 MB, free: 5.746 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.442/1.442, allocations: 222.9 MB / 240.6 MB, free: 4.52 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 12.0.0-master/package.mo): time 2.89/2.89, allocations: 482.2 MB / 0.7548 GB, free: 11.23 MB / 0.6075 GB Notification: Performance of FrontEnd - loaded program: time 0.001911/0.001911, allocations: 71.7 kB / 0.9238 GB, free: 29.57 MB / 0.7169 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.3301/0.332, allocations: 162.2 MB / 1.082 GB, free: 13.81 MB / 0.8419 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow): time 0.7823/1.114, allocations: 211.6 MB / 1.289 GB, free: 7.035 MB / 0.9981 GB Notification: Performance of NFInst.instExpressions: time 0.01001/1.124, allocations: 7.004 MB / 1.296 GB, free: 6.934 MB / 0.9981 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001955/1.126, allocations: 39.72 kB / 1.296 GB, free: 6.93 MB / 0.9981 GB Notification: Performance of NFTyping.typeComponents: time 0.002101/1.129, allocations: 0.6912 MB / 1.296 GB, free: 6.918 MB / 0.9981 GB Notification: Performance of NFTyping.typeBindings: time 0.007296/1.136, allocations: 2.355 MB / 1.299 GB, free: 6.816 MB / 0.9981 GB Notification: Performance of NFTyping.typeClassSections: time 0.003426/1.139, allocations: 1.072 MB / 1.3 GB, free: 6.785 MB / 0.9981 GB Notification: Performance of NFFlatten.flatten: time 0.004643/1.144, allocations: 2.813 MB / 1.302 GB, free: 6.777 MB / 0.9981 GB Notification: Performance of NFFlatten.resolveConnections: time 0.001754/1.146, allocations: 1.069 MB / 1.303 GB, free: 6.676 MB / 0.9981 GB Notification: Performance of NFEvalConstants.evaluate: time 0.005236/1.151, allocations: 2.263 MB / 1.306 GB, free: 6.637 MB / 0.9981 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002583/1.154, allocations: 0.9774 MB / 1.307 GB, free: 6.598 MB / 0.9981 GB Notification: Performance of NFPackage.collectConstants: time 0.0002927/1.154, allocations: 117.2 kB / 1.307 GB, free: 6.598 MB / 0.9981 GB Notification: Performance of NFFlatten.collectFunctions: time 0.004823/1.159, allocations: 2.555 MB / 1.309 GB, free: 6.574 MB / 0.9981 GB Notification: Performance of NFScalarize.scalarize: time 0.000564/1.159, allocations: 429.9 kB / 1.31 GB, free: 6.523 MB / 0.9981 GB Notification: Performance of NFVerifyModel.verify: time 0.001031/1.16, allocations: 0.6859 MB / 1.31 GB, free: 6.336 MB / 0.9981 GB Notification: Performance of NFConvertDAE.convert: time 0.003037/1.163, allocations: 1.853 MB / 1.312 GB, free: 6.188 MB / 0.9981 GB Notification: Performance of FrontEnd - DAE generated: time 5.58e-06/1.163, allocations: 0 / 1.312 GB, free: 6.188 MB / 0.9981 GB Notification: Performance of FrontEnd: time 1.924e-06/1.163, allocations: 0 / 1.312 GB, free: 6.188 MB / 0.9981 GB Notification: Performance of Transformations before backend: time 2.356e-05/1.163, allocations: 1 kB / 1.312 GB, free: 6.188 MB / 0.9981 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 209 * Number of variables: 209 Notification: Performance of Generate backend data structure: time 0.005173/1.169, allocations: 1.847 MB / 1.314 GB, free: 21.27 MB / 1.014 GB Notification: Performance of prepare preOptimizeDAE: time 4.263e-05/1.169, allocations: 9.125 kB / 1.314 GB, free: 21.27 MB / 1.014 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.003174/1.172, allocations: 0.5393 MB / 1.314 GB, free: 21.2 MB / 1.014 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.001975/1.174, allocations: 0.9558 MB / 1.315 GB, free: 20.86 MB / 1.014 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0005957/1.174, allocations: 178 kB / 1.316 GB, free: 20.85 MB / 1.014 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0001833/1.175, allocations: 84.56 kB / 1.316 GB, free: 20.85 MB / 1.014 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.002792/1.177, allocations: 1.239 MB / 1.317 GB, free: 20.79 MB / 1.014 GB Notification: Performance of preOpt findStateOrder (simulation): time 1.967e-05/1.178, allocations: 1.062 kB / 1.317 GB, free: 20.79 MB / 1.014 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0001082/1.178, allocations: 39.94 kB / 1.317 GB, free: 20.79 MB / 1.014 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 5.313e-05/1.178, allocations: 49 kB / 1.317 GB, free: 20.78 MB / 1.014 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.003513/1.181, allocations: 1.543 MB / 1.318 GB, free: 20.77 MB / 1.014 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 0.006572/1.188, allocations: 4.047 MB / 1.322 GB, free: 19.18 MB / 1.014 GB Notification: Performance of preOpt comSubExp (simulation): time 0.002343/1.19, allocations: 0.9938 MB / 1.323 GB, free: 19.13 MB / 1.014 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.001395/1.192, allocations: 0.6667 MB / 1.324 GB, free: 19.1 MB / 1.014 GB Notification: Performance of preOpt evalFunc (simulation): time 0.001148/1.193, allocations: 0.6165 MB / 1.325 GB, free: 18.53 MB / 1.014 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 3.585e-05/1.193, allocations: 46.38 kB / 1.325 GB, free: 18.48 MB / 1.014 GB Notification: Performance of pre-optimization done (n=76): time 3.206e-06/1.193, allocations: 0 / 1.325 GB, free: 18.48 MB / 1.014 GB Notification: Performance of matching and sorting (n=76): time 0.00468/1.197, allocations: 1.813 MB / 1.326 GB, free: 18.29 MB / 1.014 GB Notification: Performance of inlineWhenForInitialization (initialization): time 4.963e-05/1.198, allocations: 59.75 kB / 1.327 GB, free: 18.23 MB / 1.014 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001092/1.199, allocations: 0.8179 MB / 1.327 GB, free: 17.88 MB / 1.014 GB Notification: Performance of collectPreVariables (initialization): time 0.0001473/1.199, allocations: 46.7 kB / 1.327 GB, free: 17.83 MB / 1.014 GB Notification: Performance of collectInitialEqns (initialization): time 0.0002897/1.199, allocations: 440.8 kB / 1.328 GB, free: 17.49 MB / 1.014 GB Notification: Performance of collectInitialBindings (initialization): time 0.0001925/1.199, allocations: 267.6 kB / 1.328 GB, free: 17.28 MB / 1.014 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000279/1.2, allocations: 151.5 kB / 1.328 GB, free: 17.21 MB / 1.014 GB Notification: Performance of setup shared object (initialization): time 0.0001367/1.2, allocations: 327.7 kB / 1.328 GB, free: 16.9 MB / 1.014 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.001273/1.201, allocations: 0.5363 MB / 1.329 GB, free: 16.74 MB / 1.014 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.001311/1.202, allocations: 0.6603 MB / 1.33 GB, free: 16.47 MB / 1.014 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.002416/1.205, allocations: 1.131 MB / 1.331 GB, free: 16.05 MB / 1.014 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 3.557e-06/1.205, allocations: 0 / 1.331 GB, free: 16.05 MB / 1.014 GB Notification: Performance of matching and sorting (n=84) (initialization): time 0.003076/1.208, allocations: 1.351 MB / 1.332 GB, free: 15.59 MB / 1.014 GB Notification: Performance of prepare postOptimizeDAE: time 5.206e-05/1.208, allocations: 37.27 kB / 1.332 GB, free: 15.55 MB / 1.014 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 1.085e-05/1.208, allocations: 2.594 kB / 1.332 GB, free: 15.55 MB / 1.014 GB Notification: Performance of postOpt tearingSystem (initialization): time 1.875e-05/1.208, allocations: 5.156 kB / 1.332 GB, free: 15.55 MB / 1.014 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001509/1.209, allocations: 260.2 kB / 1.332 GB, free: 15.54 MB / 1.014 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.0007887/1.21, allocations: 1.193 MB / 1.334 GB, free: 14.34 MB / 1.014 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001394/1.212, allocations: 174.4 kB / 1.334 GB, free: 14.29 MB / 1.014 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 9.259e-05/1.212, allocations: 36.89 kB / 1.334 GB, free: 14.28 MB / 1.014 GB Notification: Performance of preBalanceInitialSystem (initialization_lambda0): time 0.001717/1.214, allocations: 0.7634 MB / 1.334 GB, free: 13.96 MB / 1.014 GB Notification: Performance of partitionIndependentBlocks (initialization_lambda0): time 0.001328/1.215, allocations: 0.6467 MB / 1.335 GB, free: 13.71 MB / 1.014 GB Notification: Performance of analyzeInitialSystem (initialization_lambda0): time 0.002488/1.217, allocations: 1.125 MB / 1.336 GB, free: 13.3 MB / 1.014 GB Notification: Performance of solveInitialSystemEqSystem (initialization_lambda0): time 2.735e-06/1.217, allocations: 4 kB / 1.336 GB, free: 13.29 MB / 1.014 GB Notification: Performance of matching and sorting (n=84) (initialization_lambda0): time 0.003194/1.221, allocations: 1.335 MB / 1.338 GB, free: 12.83 MB / 1.014 GB Notification: Performance of prepare postOptimizeDAE: time 4.951e-05/1.221, allocations: 40.73 kB / 1.338 GB, free: 12.8 MB / 1.014 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.179e-06/1.221, allocations: 0 / 1.338 GB, free: 12.8 MB / 1.014 GB Notification: Performance of postOpt tearingSystem (initialization): time 7.093e-06/1.221, allocations: 2.656 kB / 1.338 GB, free: 12.8 MB / 1.014 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.001144/1.222, allocations: 231 kB / 1.338 GB, free: 12.79 MB / 1.014 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 8.276e-06/1.222, allocations: 10.5 kB / 1.338 GB, free: 12.78 MB / 1.014 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.001366/1.223, allocations: 156 kB / 1.338 GB, free: 12.74 MB / 1.014 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 8.762e-05/1.223, allocations: 34.2 kB / 1.338 GB, free: 12.73 MB / 1.014 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 4 * Number of states: 0 () * Number of discrete variables: 2 (hex.i2_w,hex.i1_w) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (83): * Single equations (assignments): 80 * Array equations: 0 * Algorithm blocks: 1 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 2 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 2 systems {1, 1} * Without analytic Jacobian (size): 0 systems Notification: Performance of prepare postOptimizeDAE: time 0.000359/1.224, allocations: 232 kB / 1.338 GB, free: 12.52 MB / 1.014 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0002246/1.224, allocations: 108.7 kB / 1.338 GB, free: 12.46 MB / 1.014 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.003198/1.227, allocations: 1.362 MB / 1.34 GB, free: 11.98 MB / 1.014 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 9.258e-06/1.227, allocations: 14.94 kB / 1.34 GB, free: 11.98 MB / 1.014 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 7.213e-06/1.227, allocations: 0 / 1.34 GB, free: 11.98 MB / 1.014 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 1.012e-05/1.227, allocations: 2.906 kB / 1.34 GB, free: 11.98 MB / 1.014 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.005431/1.233, allocations: 2.855 MB / 1.342 GB, free: 10.73 MB / 1.014 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 7.755e-06/1.233, allocations: 3.531 kB / 1.342 GB, free: 10.73 MB / 1.014 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.001214/1.234, allocations: 236 kB / 1.343 GB, free: 10.71 MB / 1.014 GB Notification: Performance of postOpt tearingSystem (simulation): time 1.296e-05/1.234, allocations: 7 kB / 1.343 GB, free: 10.71 MB / 1.014 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 8.066e-05/1.234, allocations: 26.77 kB / 1.343 GB, free: 10.7 MB / 1.014 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.000719/1.235, allocations: 1.186 MB / 1.344 GB, free: 9.52 MB / 1.014 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.979e-06/1.235, allocations: 11.62 kB / 1.344 GB, free: 9.516 MB / 1.014 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.003336/1.238, allocations: 1.466 MB / 1.345 GB, free: 8.844 MB / 1.014 GB Notification: Performance of postOpt removeConstants (simulation): time 0.0007439/1.239, allocations: 302.4 kB / 1.346 GB, free: 8.633 MB / 1.014 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.0002849/1.239, allocations: 26.05 kB / 1.346 GB, free: 8.617 MB / 1.014 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.001432/1.241, allocations: 141.5 kB / 1.346 GB, free: 8.594 MB / 1.014 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0001703/1.241, allocations: 71.36 kB / 1.346 GB, free: 8.574 MB / 1.014 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 9.637e-05/1.241, allocations: 32.06 kB / 1.346 GB, free: 8.57 MB / 1.014 GB Notification: Performance of sorting global known variables: time 0.0009664/1.242, allocations: 0.5716 MB / 1.346 GB, free: 8.316 MB / 1.014 GB Notification: Performance of sort global known variables: time 1.1e-07/1.242, allocations: 0 / 1.346 GB, free: 8.316 MB / 1.014 GB Notification: Performance of remove unused functions: time 0.001958/1.244, allocations: 0.5296 MB / 1.347 GB, free: 8.223 MB / 1.014 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 16 * 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 (76): * Single equations (assignments): 74 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 2 * Torn equation systems: 0 * Mixed (continuous/discrete) equation systems: 0 Notification: Equation system details (not torn): * Constant Jacobian (size): 0 systems * Linear Jacobian (size,density): 0 systems * Non-linear Jacobian (size): 2 systems {1, 1} * Without analytic Jacobian (size): 0 systems Notification: Performance of Backend phase and start with SimCode phase: time 0.0008291/1.245, allocations: 292.1 kB / 1.347 GB, free: 8.062 MB / 1.014 GB Notification: Performance of simCode: created initialization part: time 0.005639/1.25, allocations: 2.131 MB / 1.349 GB, free: 7.402 MB / 1.014 GB Notification: Performance of simCode: created event and clocks part: time 7.724e-06/1.25, allocations: 0 / 1.349 GB, free: 7.402 MB / 1.014 GB Notification: Performance of simCode: created simulation system equations: time 0.001718/1.252, allocations: 0.6702 MB / 1.35 GB, free: 7.223 MB / 1.014 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.002927/1.255, allocations: 0.4975 MB / 1.35 GB, free: 7.055 MB / 1.014 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.005082/1.26, allocations: 2.556 MB / 1.353 GB, free: 5.551 MB / 1.014 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.0008279/1.261, allocations: 1.094 MB / 1.354 GB, free: 4.805 MB / 1.014 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0005799/1.262, allocations: 105.3 kB / 1.354 GB, free: 4.793 MB / 1.014 GB Notification: Performance of SimCode: time 1.133e-06/1.262, allocations: 0 / 1.354 GB, free: 4.793 MB / 1.014 GB Notification: Performance of Templates: time 0.03583/1.297, allocations: 26.74 MB / 1.38 GB, free: 6.387 MB / 1.029 GB make -j1 -f Buildings_latest_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.makefile (rm -f Buildings_latest_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.pipe ; mkfifo Buildings_latest_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.pipe ; head -c 1048576 < Buildings_latest_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.pipe >> ../files/Buildings_latest_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.sim & ./Buildings_latest_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow -abortSlowSimulation -alarm=480 -emit_protected -lv LOG_STATS > Buildings_latest_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.pipe 2>&1) diffSimulationResults("Buildings_latest_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow_res.mat","/mnt/ReferenceFiles/Buildings/csv/master/Buildings_Fluid_MassExchangers_Validation_ConstantEffectivenessZeroFlow.csv","/var/lib/jenkins1/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_latest_Buildings.Fluid.MassExchangers.Validation.ConstantEffectivenessZeroFlow.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches