Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries --ompython_omhome=/usr Buildings_9_Buildings.Fluid.HeatExchangers.Validation.WetCoilEffectivenessNTU.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 9.1.3-maint.9.1.x/package.mo", uses=false) Using package Buildings with version 9.1.3 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/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.HeatExchangers.Validation.WetCoilEffectivenessNTU,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|hexWetNTU.Q1_flow|hexWetNTU_TX.Q1_flow|hexWetNTU.sta_b2.T|hexWetNTU_TX.sta_b2.T|relHumOut_eps.phi|hexWetNTU.SHR|hexWetNTU.dryFra|hexWetNTU.UA_nominal|hexWetNTU_TX.UA_nominal",fileNamePrefix="Buildings_9_Buildings.Fluid.HeatExchangers.Validation.WetCoilEffectivenessNTU") translateModel(Buildings.Fluid.HeatExchangers.Validation.WetCoilEffectivenessNTU,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|hexWetNTU.Q1_flow|hexWetNTU_TX.Q1_flow|hexWetNTU.sta_b2.T|hexWetNTU_TX.sta_b2.T|relHumOut_eps.phi|hexWetNTU.SHR|hexWetNTU.dryFra|hexWetNTU.UA_nominal|hexWetNTU_TX.UA_nominal",fileNamePrefix="Buildings_9_Buildings.Fluid.HeatExchangers.Validation.WetCoilEffectivenessNTU") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.007141/0.007141, allocations: 102.3 kB / 15.73 MB, free: 5.578 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001537/0.001537, allocations: 195.2 kB / 16.67 MB, free: 5.52 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.314/1.314, allocations: 222.9 MB / 240.3 MB, free: 15.18 MB / 206.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 9.1.3-maint.9.1.x/package.mo): time 2.19/2.19, allocations: 390.2 MB / 0.6648 GB, free: 0.6562 MB / 0.5294 GB Notification: Performance of FrontEnd - loaded program: time 0.001267/0.001267, allocations: 60.09 kB / 0.9509 GB, free: 7.613 MB / 0.7325 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.8092/0.8104, allocations: 140.4 MB / 1.088 GB, free: 5.523 MB / 0.8575 GB Notification: Performance of NFInst.instantiate(Buildings.Fluid.HeatExchangers.Validation.WetCoilEffectivenessNTU): time 0.3821/1.193, allocations: 369.8 MB / 1.449 GB, free: 11.22 MB / 1.186 GB Notification: Performance of NFInst.instExpressions: time 0.0465/1.239, allocations: 33.3 MB / 1.482 GB, free: 9.82 MB / 1.217 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.008146/1.247, allocations: 147.2 kB / 1.482 GB, free: 9.676 MB / 1.217 GB Notification: Performance of NFTyping.typeComponents: time 0.009753/1.257, allocations: 2.446 MB / 1.484 GB, free: 7.215 MB / 1.217 GB Notification: Performance of NFTyping.typeBindings: time 0.02257/1.28, allocations: 7.831 MB / 1.492 GB, free: 15.35 MB / 1.232 GB Notification: Performance of NFTyping.typeClassSections: time 0.01238/1.292, allocations: 4.574 MB / 1.496 GB, free: 10.8 MB / 1.232 GB Notification: Performance of NFFlatten.flatten: time 0.01669/1.309, allocations: 11.08 MB / 1.507 GB, free: 15.69 MB / 1.248 GB Notification: Performance of NFFlatten.resolveConnections: time 0.008431/1.317, allocations: 3.976 MB / 1.511 GB, free: 11.65 MB / 1.248 GB Notification: Performance of NFEvalConstants.evaluate: time 0.01852/1.336, allocations: 5.561 MB / 1.516 GB, free: 6.133 MB / 1.248 GB Notification: Performance of NFSimplifyModel.simplify: time 0.008663/1.345, allocations: 3.458 MB / 1.52 GB, free: 2.676 MB / 1.248 GB Notification: Performance of NFPackage.collectConstants: time 0.002431/1.347, allocations: 0.5469 MB / 1.52 GB, free: 2.129 MB / 1.248 GB Notification: Performance of NFFlatten.collectFunctions: time 0.01524/1.362, allocations: 6.818 MB / 1.527 GB, free: 11.3 MB / 1.264 GB Notification: Performance of NFScalarize.scalarize: time 0.002878/1.365, allocations: 1.468 MB / 1.528 GB, free: 9.824 MB / 1.264 GB Notification: Performance of NFVerifyModel.verify: time 0.006022/1.371, allocations: 2.831 MB / 1.531 GB, free: 6.98 MB / 1.264 GB Notification: Performance of NFConvertDAE.convert: time 0.01986/1.391, allocations: 9.754 MB / 1.541 GB, free: 13.2 MB / 1.279 GB Notification: Performance of FrontEnd - DAE generated: time 8.817e-06/1.391, allocations: 4 kB / 1.541 GB, free: 13.2 MB / 1.279 GB Notification: Performance of FrontEnd: time 2.124e-06/1.391, allocations: 0 / 1.541 GB, free: 13.2 MB / 1.279 GB Notification: Performance of Transformations before backend: time 0.0003016/1.392, allocations: 4 kB / 1.541 GB, free: 13.19 MB / 1.279 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 851 * Number of variables: 851 Notification: Performance of Generate backend data structure: time 0.01875/1.41, allocations: 5.935 MB / 1.546 GB, free: 7.152 MB / 1.279 GB Notification: Performance of prepare preOptimizeDAE: time 5.128e-05/1.41, allocations: 12.03 kB / 1.546 GB, free: 7.141 MB / 1.279 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.03059/1.441, allocations: 4.286 MB / 1.551 GB, free: 2.844 MB / 1.279 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.0106/1.452, allocations: 3.705 MB / 1.554 GB, free: 15.07 MB / 1.295 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0004864/1.452, allocations: 304.9 kB / 1.555 GB, free: 14.77 MB / 1.295 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.001925/1.454, allocations: 356 kB / 1.555 GB, free: 14.42 MB / 1.295 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.01944/1.474, allocations: 5.693 MB / 1.56 GB, free: 8.641 MB / 1.295 GB Notification: Performance of preOpt findStateOrder (simulation): time 0.0001325/1.474, allocations: 4 kB / 1.56 GB, free: 8.637 MB / 1.295 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.001162/1.475, allocations: 132 kB / 1.561 GB, free: 8.508 MB / 1.295 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0001554/1.475, allocations: 142.5 kB / 1.561 GB, free: 8.367 MB / 1.295 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.02319/1.498, allocations: 6.798 MB / 1.567 GB, free: 1.559 MB / 1.295 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 0.6437/2.142, allocations: 22.13 MB / 1.589 GB, free: 436.3 MB / 1.311 GB Notification: Performance of preOpt comSubExp (simulation): time 0.01235/2.154, allocations: 4.061 MB / 1.593 GB, free: 435.3 MB / 1.311 GB Notification: Performance of preOpt resolveLoops (simulation): time 0.007284/2.162, allocations: 2.271 MB / 1.595 GB, free: 434.5 MB / 1.311 GB Notification: Performance of preOpt evalFunc (simulation): time 0.02114/2.183, allocations: 8.186 MB / 1.603 GB, free: 429.6 MB / 1.311 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 0.007057/2.19, allocations: 2.391 MB / 1.605 GB, free: 428.9 MB / 1.311 GB Notification: Performance of pre-optimization done (n=230): time 5.36e-06/2.19, allocations: 0 / 1.605 GB, free: 428.9 MB / 1.311 GB Notification: Performance of matching and sorting (n=230): time 0.03291/2.223, allocations: 8.438 MB / 1.614 GB, free: 426.4 MB / 1.311 GB Notification: Performance of inlineWhenForInitialization (initialization): time 5.323e-05/2.223, allocations: 79.94 kB / 1.614 GB, free: 426.3 MB / 1.311 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.008389/2.231, allocations: 4.284 MB / 1.618 GB, free: 424.8 MB / 1.311 GB Notification: Performance of collectPreVariables (initialization): time 0.0007383/2.232, allocations: 76.11 kB / 1.618 GB, free: 424.7 MB / 1.311 GB Notification: Performance of collectInitialEqns (initialization): time 0.001502/2.234, allocations: 1.818 MB / 1.62 GB, free: 423.4 MB / 1.311 GB Notification: Performance of collectInitialBindings (initialization): time 0.001061/2.235, allocations: 0.8018 MB / 1.621 GB, free: 422.7 MB / 1.311 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.001933/2.237, allocations: 0.8054 MB / 1.621 GB, free: 422.4 MB / 1.311 GB Notification: Performance of setup shared object (initialization): time 5.072e-05/2.237, allocations: 311.1 kB / 1.622 GB, free: 422.1 MB / 1.311 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.008746/2.246, allocations: 2.709 MB / 1.624 GB, free: 421.3 MB / 1.311 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.009992/2.256, allocations: 3.409 MB / 1.628 GB, free: 419.8 MB / 1.311 GB Notification: It was not possible to check the given initialization system for consistency symbolically, because the relevant equations are part of an algebraic loop. This is not supported yet. Notification: Performance of analyzeInitialSystem (initialization): time 0.01889/2.275, allocations: 5.948 MB / 1.633 GB, free: 417.1 MB / 1.311 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 4.826e-05/2.275, allocations: 4.469 kB / 1.633 GB, free: 417.1 MB / 1.311 GB Notification: Performance of matching and sorting (n=448) (initialization): time 0.02822/2.303, allocations: 7.554 MB / 1.641 GB, free: 414.6 MB / 1.311 GB Notification: Performance of prepare postOptimizeDAE: time 6.215e-05/2.303, allocations: 11.75 kB / 1.641 GB, free: 414.6 MB / 1.311 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 5.767e-05/2.303, allocations: 14.47 kB / 1.641 GB, free: 414.6 MB / 1.311 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.004314/2.307, allocations: 0.9719 MB / 1.642 GB, free: 414.3 MB / 1.311 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.009329/2.317, allocations: 1.406 MB / 1.643 GB, free: 414.2 MB / 1.311 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01477/2.332, allocations: 14.45 MB / 1.657 GB, free: 401 MB / 1.311 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.01069/2.342, allocations: 1.172 MB / 1.658 GB, free: 400.7 MB / 1.311 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.001082/2.343, allocations: 180.7 kB / 1.659 GB, free: 400.7 MB / 1.311 GB Warning: The initial conditions are over specified. The following 2 initial equations are redundant, so they are removed from the initialization system: hexWetNTU.UAFroRated.TAirIn = 293.15 hexWetNTU.UAFroRated.TWatIn = 293.15. Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 67 * Number of states: 0 () * Number of discrete variables: 13 (hexWetNTU.UAFroRated.isFulWet,hexWetNTU.UAFroRated.isFulDry,hexWetNTU.flowRegime_nominal,hexWetNTU_TX.flowRegime_nominal,$PRE.w_a2.nextTimeEvent,$whenCondition1,hexWetNTU_TX.UAFroRated.isFulWet,hexWetNTU_TX.UAFroRated.isFulDry,w_a2.nextTimeEventScaled,$PRE.w_a2.nextTimeEventScaled,w_a2.nextTimeEvent,hexWetNTU_TX.flowRegime,hexWetNTU.flowRegime) * Number of discrete states: 0 () * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for initialization (418): * Single equations (assignments): 403 * Array equations: 4 * Algorithm blocks: 0 * Record equations: 0 * When equations: 0 * If-equations: 0 * Equation systems (not torn): 2 * Torn equation systems: 9 * 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: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 9 systems {(1,1), (1,3), (1,2), (1,2), (1,4), (1,2), (1,4), (1,2), (5,2)} Notification: Performance of prepare postOptimizeDAE: time 0.002411/2.346, allocations: 0.8628 MB / 1.659 GB, free: 400.1 MB / 1.311 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.001435/2.347, allocations: 421.8 kB / 1.66 GB, free: 399.9 MB / 1.311 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.02022/2.367, allocations: 5.79 MB / 1.666 GB, free: 397.7 MB / 1.311 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 3.795e-05/2.368, allocations: 32.67 kB / 1.666 GB, free: 397.7 MB / 1.311 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.003e-05/2.368, allocations: 0 / 1.666 GB, free: 397.7 MB / 1.311 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 4.494e-05/2.368, allocations: 11.95 kB / 1.666 GB, free: 397.7 MB / 1.311 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.02856/2.396, allocations: 10.92 MB / 1.676 GB, free: 390.6 MB / 1.311 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 1.986e-05/2.396, allocations: 3.969 kB / 1.676 GB, free: 390.6 MB / 1.311 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.004522/2.401, allocations: 0.6696 MB / 1.677 GB, free: 390.4 MB / 1.311 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.00298/2.404, allocations: 0.7673 MB / 1.678 GB, free: 390 MB / 1.311 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0007129/2.404, allocations: 79.56 kB / 1.678 GB, free: 389.9 MB / 1.311 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.0109/2.415, allocations: 11.67 MB / 1.689 GB, free: 378.8 MB / 1.311 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 4.719e-06/2.415, allocations: 3.969 kB / 1.689 GB, free: 378.8 MB / 1.311 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.02605/2.441, allocations: 8.218 MB / 1.697 GB, free: 374.4 MB / 1.311 GB Notification: Performance of postOpt removeConstants (simulation): time 0.00333/2.445, allocations: 1.06 MB / 1.698 GB, free: 373.5 MB / 1.311 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.001214/2.446, allocations: 54.95 kB / 1.698 GB, free: 373.5 MB / 1.311 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.00578/2.452, allocations: 0.515 MB / 1.699 GB, free: 373.3 MB / 1.311 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0004078/2.452, allocations: 172.3 kB / 1.699 GB, free: 373.2 MB / 1.311 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.0003113/2.453, allocations: 105.9 kB / 1.699 GB, free: 373.1 MB / 1.311 GB Notification: Performance of sorting global known variables: time 0.005204/2.458, allocations: 2.947 MB / 1.702 GB, free: 371.6 MB / 1.311 GB Notification: Performance of sort global known variables: time 3.61e-07/2.458, allocations: 0 / 1.702 GB, free: 371.6 MB / 1.311 GB Notification: Performance of remove unused functions: time 0.004984/2.463, allocations: 1.537 MB / 1.703 GB, free: 371.4 MB / 1.311 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 16 * Number of states: 8 (relHumIn.phi,TDryBulIn.T,senMasFraIn.X,senMasFraOut.X,TDryBulOut.T,hexWetNTU.dryWetCalcs.fullyWet.TWatOutEst,relHumOut_eps.phi,hexWetNTU_TX.dryWetCalcs.fullyWet.TWatOutEst) * Number of discrete variables: 5 ($whenCondition1,hexWetNTU.flowRegime,hexWetNTU_TX.flowRegime,w_a2.nextTimeEvent,w_a2.nextTimeEventScaled) * Number of discrete states: 2 (w_a2.nextTimeEvent,w_a2.nextTimeEventScaled) * Number of clocked states: 0 () * Top-level inputs: 0 Notification: Strong component statistics for simulation (227): * Single equations (assignments): 214 * Array equations: 0 * Algorithm blocks: 0 * Record equations: 3 * When equations: 2 * If-equations: 0 * Equation systems (not torn): 0 * Torn equation systems: 8 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems (#iteration vars, #inner vars, density): 0 systems * Non-linear torn systems (#iteration vars, #inner vars): 8 systems {(1,4), (1,2), (1,4), (1,2), (1,1), (1,1), (1,3), (1,3)} Notification: Performance of Backend phase and start with SimCode phase: time 0.002324/2.465, allocations: 1.06 MB / 1.704 GB, free: 370.9 MB / 1.311 GB Notification: Performance of simCode: created initialization part: time 0.01985/2.485, allocations: 6.385 MB / 1.711 GB, free: 365.1 MB / 1.311 GB Notification: Performance of simCode: created event and clocks part: time 9.959e-06/2.485, allocations: 4 kB / 1.711 GB, free: 365.1 MB / 1.311 GB Notification: Performance of simCode: created simulation system equations: time 0.00823/2.493, allocations: 3.034 MB / 1.714 GB, free: 361.9 MB / 1.311 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.011/2.504, allocations: 2.086 MB / 1.716 GB, free: 359.9 MB / 1.311 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02473/2.529, allocations: 9.144 MB / 1.725 GB, free: 350.7 MB / 1.311 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.001442/2.531, allocations: 2.298 MB / 1.727 GB, free: 348.4 MB / 1.311 GB Notification: Performance of simCode: alias equations: time 0.005486/2.536, allocations: 1.051 MB / 1.728 GB, free: 347.4 MB / 1.311 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.001751/2.538, allocations: 367.2 kB / 1.728 GB, free: 347 MB / 1.311 GB Notification: Performance of SimCode: time 1.042e-06/2.538, allocations: 0 / 1.728 GB, free: 347 MB / 1.311 GB Notification: Performance of Templates: time 0.1292/2.667, allocations: 97.47 MB / 1.823 GB, free: 250.4 MB / 1.311 GB make -j1 -f Buildings_9_Buildings.Fluid.HeatExchangers.Validation.WetCoilEffectivenessNTU.makefile (rm -f Buildings_9_Buildings.Fluid.HeatExchangers.Validation.WetCoilEffectivenessNTU.pipe ; mkfifo Buildings_9_Buildings.Fluid.HeatExchangers.Validation.WetCoilEffectivenessNTU.pipe ; head -c 1048576 < Buildings_9_Buildings.Fluid.HeatExchangers.Validation.WetCoilEffectivenessNTU.pipe >> ../files/Buildings_9_Buildings.Fluid.HeatExchangers.Validation.WetCoilEffectivenessNTU.sim & ./Buildings_9_Buildings.Fluid.HeatExchangers.Validation.WetCoilEffectivenessNTU -abortSlowSimulation -alarm=480 -emit_protected -lv LOG_STATS > Buildings_9_Buildings.Fluid.HeatExchangers.Validation.WetCoilEffectivenessNTU.pipe 2>&1) diffSimulationResults("Buildings_9_Buildings.Fluid.HeatExchangers.Validation.WetCoilEffectivenessNTU_res.mat","/mnt/ReferenceFiles/Buildings/csv/maint_9.1.x/Buildings_Fluid_HeatExchangers_Validation_WetCoilEffectivenessNTU.csv","/var/lib/jenkins/ws/OpenModelicaLibraryTestingWork/OpenModelicaLibraryTesting/files/Buildings_9_Buildings.Fluid.HeatExchangers.Validation.WetCoilEffectivenessNTU.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches