Running: ./testmodel.py --libraries=/home/hudson/saved_omc/libraries/.openmodelica/libraries/ --ompython_omhome=/usr Buildings_latest_Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD.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 11.0.0-master/package.mo", uses=false) Using package Buildings with version 11.0.0 (/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.0.0-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.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|probe_Y_1.V.1.|probe_Y_1.V.2.|probe_Y_1.V.3.|probe_D_1.V.1.|probe_D_1.V.2.|probe_D_1.V.3.|probe_2.V.1.|probe_2.V.2.|probe_2.V.3.|probe_Y_1.theta.1.|probe_Y_1.theta.2.|probe_Y_1.theta.3.|probe_D_1.theta.1.|probe_D_1.theta.2.|probe_D_1.theta.3.|probe_2.theta.1.|probe_2.theta.2.|probe_2.theta.3.",fileNamePrefix="Buildings_latest_Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD") translateModel(Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD,tolerance=1e-06,outputFormat="mat",numberOfIntervals=5000,variableFilter="time|probe_Y_1.V.1.|probe_Y_1.V.2.|probe_Y_1.V.3.|probe_D_1.V.1.|probe_D_1.V.2.|probe_D_1.V.3.|probe_2.V.1.|probe_2.V.2.|probe_2.V.3.|probe_Y_1.theta.1.|probe_Y_1.theta.2.|probe_Y_1.theta.3.|probe_D_1.theta.1.|probe_D_1.theta.2.|probe_D_1.theta.3.|probe_2.theta.1.|probe_2.theta.2.|probe_2.theta.3.",fileNamePrefix="Buildings_latest_Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD") Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/ModelicaServices 4.0.0+maint.om/package.mo): time 0.001267/0.001267, allocations: 99.86 kB / 15.05 MB, free: 1.105 MB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Complex 4.0.0+maint.om/package.mo): time 0.001559/0.001559, allocations: 177.3 kB / 15.94 MB, free: 228 kB / 14.72 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Modelica 4.0.0+maint.om/package.mo): time 1.461/1.461, allocations: 223.2 MB / 239.9 MB, free: 5.449 MB / 190.1 MB Notification: Performance of loadFile(/home/hudson/saved_omc/libraries/.openmodelica/libraries/Buildings 11.0.0-master/package.mo): time 2.748/2.748, allocations: 436.5 MB / 0.7104 GB, free: 7.844 MB / 0.5606 GB Notification: Performance of FrontEnd - loaded program: time 0.0003446/0.0003446, allocations: 12 kB / 0.8708 GB, free: 4.773 MB / 0.7169 GB Notification: Performance of FrontEnd - Absyn->SCode: time 0.7624/0.7628, allocations: 153.6 MB / 1.021 GB, free: 1.102 MB / 0.7637 GB Notification: Performance of NFInst.instantiate(Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD): time 0.01711/0.7799, allocations: 14.5 MB / 1.035 GB, free: 2.559 MB / 0.7794 GB Notification: Performance of NFInst.instExpressions: time 0.009132/0.7891, allocations: 5.513 MB / 1.04 GB, free: 13.03 MB / 0.795 GB Notification: Performance of NFInst.updateImplicitVariability: time 0.001214/0.7904, allocations: 31.94 kB / 1.04 GB, free: 13 MB / 0.795 GB Notification: Performance of NFTyping.typeComponents: time 0.0008619/0.7912, allocations: 322.1 kB / 1.041 GB, free: 12.68 MB / 0.795 GB Notification: Performance of NFTyping.typeBindings: time 0.002354/0.7936, allocations: 0.6113 MB / 1.041 GB, free: 12.07 MB / 0.795 GB Notification: Performance of NFTyping.typeClassSections: time 0.002008/0.7956, allocations: 0.6268 MB / 1.042 GB, free: 11.44 MB / 0.795 GB Notification: Performance of NFFlatten.flatten: time 0.002716/0.7984, allocations: 1.739 MB / 1.044 GB, free: 9.699 MB / 0.795 GB Notification: Performance of NFFlatten.resolveConnections: time 0.009032/0.8074, allocations: 5.821 MB / 1.049 GB, free: 3.824 MB / 0.795 GB Notification: Performance of NFEvalConstants.evaluate: time 0.002564/0.81, allocations: 1.044 MB / 1.05 GB, free: 2.777 MB / 0.795 GB Notification: Performance of NFSimplifyModel.simplify: time 0.002286/0.8123, allocations: 1.219 MB / 1.052 GB, free: 1.555 MB / 0.795 GB Notification: Performance of NFPackage.collectConstants: time 0.0004112/0.8127, allocations: 188 kB / 1.052 GB, free: 1.371 MB / 0.795 GB Notification: Performance of NFFlatten.collectFunctions: time 0.001797/0.8145, allocations: 0.5736 MB / 1.052 GB, free: 0.7969 MB / 0.795 GB Notification: Performance of NFScalarize.scalarize: time 0.001655/0.8162, allocations: 1.29 MB / 1.054 GB, free: 15.5 MB / 0.8106 GB Notification: Performance of NFVerifyModel.verify: time 0.0008948/0.8171, allocations: 0.5472 MB / 1.054 GB, free: 14.95 MB / 0.8106 GB Notification: Performance of NFConvertDAE.convert: time 0.00639/0.8235, allocations: 5.258 MB / 1.059 GB, free: 9.68 MB / 0.8106 GB Notification: Performance of FrontEnd - DAE generated: time 4.518e-06/0.8236, allocations: 0 / 1.059 GB, free: 9.68 MB / 0.8106 GB Notification: Performance of FrontEnd: time 3.847e-06/0.8236, allocations: 0 / 1.059 GB, free: 9.68 MB / 0.8106 GB Notification: Performance of Transformations before backend: time 0.000221/0.8238, allocations: 4 kB / 1.059 GB, free: 9.676 MB / 0.8106 GB Notification: Model statistics after passing the front-end and creating the data structures used by the back-end: * Number of equations: 769 * Number of variables: 769 Notification: Performance of Generate backend data structure: time 0.006407/0.8302, allocations: 2.408 MB / 1.062 GB, free: 7.207 MB / 0.8106 GB Notification: Performance of prepare preOptimizeDAE: time 5.316e-05/0.8303, allocations: 11.98 kB / 1.062 GB, free: 7.195 MB / 0.8106 GB Notification: Performance of preOpt normalInlineFunction (simulation): time 0.01144/0.8417, allocations: 2.072 MB / 1.064 GB, free: 5.117 MB / 0.8106 GB Notification: Performance of preOpt evaluateParameters (simulation): time 0.004934/0.8467, allocations: 1.58 MB / 1.065 GB, free: 3.492 MB / 0.8106 GB Notification: Performance of preOpt simplifyIfEquations (simulation): time 0.0002033/0.8469, allocations: 213.8 kB / 1.065 GB, free: 3.281 MB / 0.8106 GB Notification: Performance of preOpt expandDerOperator (simulation): time 0.0009458/0.8479, allocations: 276 kB / 1.066 GB, free: 3.012 MB / 0.8106 GB Notification: Performance of preOpt clockPartitioning (simulation): time 0.01217/0.8601, allocations: 5.646 MB / 1.071 GB, free: 13.27 MB / 0.8262 GB Notification: Performance of preOpt findStateOrder (simulation): time 5.321e-05/0.8602, allocations: 0 / 1.071 GB, free: 13.27 MB / 0.8262 GB Notification: Performance of preOpt replaceEdgeChange (simulation): time 0.0003363/0.8605, allocations: 120 kB / 1.071 GB, free: 13.15 MB / 0.8262 GB Notification: Performance of preOpt inlineArrayEqn (simulation): time 0.0003161/0.8608, allocations: 204.7 kB / 1.071 GB, free: 12.95 MB / 0.8262 GB Notification: Performance of preOpt removeEqualRHS (simulation): time 0.01414/0.875, allocations: 5.806 MB / 1.077 GB, free: 7.129 MB / 0.8262 GB Notification: Performance of preOpt removeSimpleEquations (simulation): time 0.03094/0.906, allocations: 22.84 MB / 1.099 GB, free: 14.25 MB / 0.8575 GB Notification: Performance of preOpt comSubExp (simulation): time 0.006106/0.9121, allocations: 3.1 MB / 1.102 GB, free: 10.99 MB / 0.8575 GB Notification: Performance of preOpt evalFunc (simulation): time 0.0002186/0.9124, allocations: 122 kB / 1.103 GB, free: 10.85 MB / 0.8575 GB Notification: Performance of preOpt encapsulateWhenConditions (simulation): time 4.949e-05/0.9124, allocations: 55.48 kB / 1.103 GB, free: 10.79 MB / 0.8575 GB Notification: Performance of pre-optimization done (n=132): time 3.747e-06/0.9125, allocations: 0 / 1.103 GB, free: 10.79 MB / 0.8575 GB Notification: Performance of matching and sorting (n=132): time 0.01792/0.9304, allocations: 6.089 MB / 1.109 GB, free: 4.668 MB / 0.8575 GB Notification: Performance of inlineWhenForInitialization (initialization): time 0.0002439/0.9307, allocations: 230.6 kB / 1.109 GB, free: 4.391 MB / 0.8575 GB Notification: Performance of selectInitializationVariablesDAE (initialization): time 0.001468/0.9321, allocations: 0.9452 MB / 1.11 GB, free: 3.438 MB / 0.8575 GB Notification: Performance of collectPreVariables (initialization): time 0.0001794/0.9323, allocations: 53.58 kB / 1.11 GB, free: 3.379 MB / 0.8575 GB Notification: Performance of collectInitialEqns (initialization): time 0.000869/0.9332, allocations: 1.157 MB / 1.111 GB, free: 2.203 MB / 0.8575 GB Notification: Performance of collectInitialBindings (initialization): time 0.0005505/0.9338, allocations: 469.4 kB / 1.111 GB, free: 1.738 MB / 0.8575 GB Notification: Performance of simplifyInitialFunctions (initialization): time 0.000126/0.9339, allocations: 36 kB / 1.111 GB, free: 1.703 MB / 0.8575 GB Notification: Performance of setup shared object (initialization): time 0.0003376/0.9342, allocations: 414.7 kB / 1.112 GB, free: 1.289 MB / 0.8575 GB Notification: Performance of preBalanceInitialSystem (initialization): time 0.004482/0.9387, allocations: 1.67 MB / 1.113 GB, free: 15.62 MB / 0.8731 GB Notification: Performance of partitionIndependentBlocks (initialization): time 0.005007/0.9438, allocations: 2.236 MB / 1.116 GB, free: 13.14 MB / 0.8731 GB Notification: Performance of analyzeInitialSystem (initialization): time 0.004992/0.9488, allocations: 1.919 MB / 1.117 GB, free: 11.22 MB / 0.8731 GB Notification: Performance of solveInitialSystemEqSystem (initialization): time 1.478e-05/0.9488, allocations: 8 kB / 1.117 GB, free: 11.21 MB / 0.8731 GB Notification: Performance of matching and sorting (n=240) (initialization): time 0.01117/0.96, allocations: 4.489 MB / 1.122 GB, free: 6.707 MB / 0.8731 GB Notification: Performance of prepare postOptimizeDAE: time 0.00388/0.9639, allocations: 6.879 MB / 1.129 GB, free: 15.29 MB / 0.8887 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 4.272e-05/0.964, allocations: 20 kB / 1.129 GB, free: 15.27 MB / 0.8887 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.002319/0.9663, allocations: 0.638 MB / 1.129 GB, free: 14.62 MB / 0.8887 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.003445/0.9698, allocations: 0.7253 MB / 1.13 GB, free: 13.9 MB / 0.8887 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.007634/0.9774, allocations: 5.357 MB / 1.135 GB, free: 8.406 MB / 0.8887 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.004848/0.9823, allocations: 0.5677 MB / 1.136 GB, free: 7.836 MB / 0.8887 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0006023/0.983, allocations: 96.52 kB / 1.136 GB, free: 7.742 MB / 0.8887 GB Notification: Performance of prepare postOptimizeDAE: time 1.788e-05/0.983, allocations: 7.953 kB / 1.136 GB, free: 7.734 MB / 0.8887 GB Notification: Performance of postOpt replaceHomotopyWithSimplified (initialization): time 0.01654/0.9995, allocations: 4.341 MB / 1.14 GB, free: 3.387 MB / 0.8887 GB Notification: Performance of postOpt simplifyComplexFunction (initialization): time 7.597e-05/0.9997, allocations: 20.08 kB / 1.14 GB, free: 3.367 MB / 0.8887 GB Notification: Performance of postOpt tearingSystem (initialization): time 0.00145/1.001, allocations: 442 kB / 1.14 GB, free: 2.934 MB / 0.8887 GB Notification: Performance of postOpt solveSimpleEquations (initialization): time 0.004837/1.006, allocations: 0.7331 MB / 1.141 GB, free: 2.199 MB / 0.8887 GB Notification: Performance of postOpt calculateStrongComponentJacobians (initialization): time 0.01073/1.017, allocations: 5.252 MB / 1.146 GB, free: 12.81 MB / 0.9044 GB Notification: Performance of postOpt simplifyAllExpressions (initialization): time 0.004865/1.022, allocations: 0.5213 MB / 1.147 GB, free: 12.29 MB / 0.9044 GB Notification: Performance of postOpt collapseArrayExpressions (initialization): time 0.0005539/1.022, allocations: 99.95 kB / 1.147 GB, free: 12.19 MB / 0.9044 GB Notification: Model statistics after passing the back-end for initialization: * Number of independent subsystems: 79 * 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 (205): * Single equations (assignments): 204 * 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: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 1 {(6,75.0%) 30} * Non-linear torn systems: 0 Notification: Performance of prepare postOptimizeDAE: time 0.003355/1.026, allocations: 1.215 MB / 1.148 GB, free: 10.96 MB / 0.9044 GB Notification: Performance of postOpt lateInlineFunction (simulation): time 0.0005809/1.026, allocations: 118.6 kB / 1.148 GB, free: 10.84 MB / 0.9044 GB Notification: Performance of postOpt wrapFunctionCalls (simulation): time 0.01413/1.04, allocations: 3.951 MB / 1.152 GB, free: 6.855 MB / 0.9044 GB Notification: Performance of postOpt inlineArrayEqn (simulation): time 2.997e-05/1.04, allocations: 12 kB / 1.152 GB, free: 6.844 MB / 0.9044 GB Notification: Performance of postOpt constantLinearSystem (simulation): time 1.581e-05/1.04, allocations: 8 kB / 1.152 GB, free: 6.836 MB / 0.9044 GB Notification: Performance of postOpt simplifysemiLinear (simulation): time 2.41e-05/1.041, allocations: 3.984 kB / 1.152 GB, free: 6.832 MB / 0.9044 GB Notification: Performance of postOpt removeSimpleEquations (simulation): time 0.02329/1.064, allocations: 7.374 MB / 1.159 GB, free: 15.32 MB / 0.92 GB Notification: Performance of postOpt simplifyComplexFunction (simulation): time 2.057e-05/1.064, allocations: 4 kB / 1.159 GB, free: 15.32 MB / 0.92 GB Notification: Performance of postOpt solveSimpleEquations (simulation): time 0.003544/1.067, allocations: 0.5152 MB / 1.16 GB, free: 14.8 MB / 0.92 GB Notification: Performance of postOpt tearingSystem (simulation): time 0.001708/1.069, allocations: 473.5 kB / 1.16 GB, free: 14.34 MB / 0.92 GB Notification: Performance of postOpt inputDerivativesUsed (simulation): time 0.0002763/1.069, allocations: 51.95 kB / 1.16 GB, free: 14.29 MB / 0.92 GB Notification: Performance of postOpt calculateStrongComponentJacobians (simulation): time 0.01028/1.08, allocations: 5.244 MB / 1.165 GB, free: 8.91 MB / 0.92 GB Notification: Performance of postOpt calculateStateSetsJacobians (simulation): time 1.203e-05/1.08, allocations: 8 kB / 1.165 GB, free: 8.902 MB / 0.92 GB Notification: Performance of postOpt symbolicJacobian (simulation): time 0.01482/1.095, allocations: 4.124 MB / 1.169 GB, free: 4.57 MB / 0.92 GB Notification: Performance of postOpt removeConstants (simulation): time 0.001769/1.097, allocations: 495.3 kB / 1.17 GB, free: 4.066 MB / 0.92 GB Notification: Performance of postOpt simplifyTimeIndepFuncCalls (simulation): time 0.000376/1.097, allocations: 28 kB / 1.17 GB, free: 4.039 MB / 0.92 GB Notification: Performance of postOpt simplifyAllExpressions (simulation): time 0.003515/1.1, allocations: 399.3 kB / 1.17 GB, free: 3.648 MB / 0.92 GB Notification: Performance of postOpt findZeroCrossings (simulation): time 0.0003437/1.101, allocations: 112.7 kB / 1.17 GB, free: 3.539 MB / 0.92 GB Notification: Performance of postOpt collapseArrayExpressions (simulation): time 0.000201/1.101, allocations: 55.92 kB / 1.17 GB, free: 3.484 MB / 0.92 GB Notification: Performance of sorting global known variables: time 0.001369/1.102, allocations: 0.6864 MB / 1.171 GB, free: 2.805 MB / 0.92 GB Notification: Performance of sort global known variables: time 3.9e-07/1.102, allocations: 0 / 1.171 GB, free: 2.805 MB / 0.92 GB Notification: Performance of remove unused functions: time 0.005913/1.108, allocations: 1.435 MB / 1.173 GB, free: 1.363 MB / 0.92 GB Notification: Model statistics after passing the back-end for simulation: * Number of independent subsystems: 22 * 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 (94): * Single equations (assignments): 93 * 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: 1 * Mixed (continuous/discrete) equation systems: 0 Notification: Torn system details for strict tearing set: * Linear torn systems: 1 {(4,100.0%) 32} * Non-linear torn systems: 0 Notification: Performance of Backend phase and start with SimCode phase: time 0.0004477/1.109, allocations: 139.1 kB / 1.173 GB, free: 1.215 MB / 0.92 GB Notification: Performance of simCode: created initialization part: time 0.02356/1.132, allocations: 6.464 MB / 1.179 GB, free: 10.73 MB / 0.9356 GB Notification: Performance of simCode: created event and clocks part: time 1.774e-05/1.132, allocations: 4.188 kB / 1.179 GB, free: 10.73 MB / 0.9356 GB Notification: Performance of simCode: created simulation system equations: time 0.007212/1.14, allocations: 1.994 MB / 1.181 GB, free: 8.719 MB / 0.9356 GB Notification: Performance of simCode: created of all other equations (e.g. parameter, nominal, assert, etc): time 0.001585/1.141, allocations: 137.9 kB / 1.181 GB, free: 8.582 MB / 0.9356 GB Notification: Performance of simCode: created linear, non-linear and system jacobian parts: time 0.02109/1.162, allocations: 7.701 MB / 1.189 GB, free: 0.7852 MB / 0.9356 GB Notification: Performance of simCode: some other stuff during SimCode phase: time 0.002161/1.165, allocations: 2.239 MB / 1.191 GB, free: 14.51 MB / 0.9512 GB Notification: Performance of simCode: alias equations: time 0.003737/1.168, allocations: 1.216 MB / 1.192 GB, free: 13.29 MB / 0.9512 GB Notification: Performance of simCode: all other stuff during SimCode phase: time 0.0004923/1.169, allocations: 119.3 kB / 1.192 GB, free: 13.18 MB / 0.9512 GB Notification: Performance of SimCode: time 8.32e-07/1.169, allocations: 0 / 1.192 GB, free: 13.18 MB / 0.9512 GB Notification: Performance of Templates: time 0.0432/1.212, allocations: 24.83 MB / 1.216 GB, free: 4.422 MB / 0.9669 GB make -j1 -f Buildings_latest_Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD.makefile (rm -f Buildings_latest_Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD.pipe ; mkfifo Buildings_latest_Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD.pipe ; head -c 1048576 < Buildings_latest_Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD.pipe >> ../files/Buildings_latest_Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD.sim & ./Buildings_latest_Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD -abortSlowSimulation -alarm=480 -emit_protected -lv LOG_STATS > Buildings_latest_Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD.pipe 2>&1) diffSimulationResults("Buildings_latest_Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD_res.mat","/mnt/ReferenceFiles/Buildings/csv/master/Buildings_Electrical_AC_ThreePhasesUnbalanced_Conversion_Examples_TransformerStepDownYD.csv","../files/Buildings_latest_Buildings.Electrical.AC.ThreePhasesUnbalanced.Conversion.Examples.TransformerStepDownYD.diff",relTol=0.003,relTolDiffMinMax=0.003,rangeDelta=0.001) Reference file matches