error while simulating comsol code in matlab

Dear all;

I exported the comsol simulation code exactly as it is. without any modification. (after saving the comsol simulation in .m format, I opened the file in matlab and run the code without any modification so i can simulated it in matlab and then work on optimization side. ; I got the following errors. what should I do to make it work?

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Error using Ferdaous (line 4630)

Java exception occurred:

Exception:

com.comsol.util.exceptions.FlException: Syntax error in expression

Messages:

Failed to evaluate expression for parameter Fzz.

Syntax error in expression.

- Expression: atan( (1/sqrt(((RT+H)/RT))*((RT+H)/RT))-1))-sqrt(((RT+H)/RT))*((RT+H)/RT))-1) )/pi

- Subexpression: )-sqrt(((RT+H)/RT))* ...

- Position: 43

Stack trace:

at com.comsol.util.classes.exprparser.ExprParser.a(SourceFile:75)

at com.comsol.util.classes.exprparser.ExprParser.a(SourceFile:214)

at com.comsol.util.classes.exprparser.ExprParser.a(SourceFile:126)

at com.comsol.util.classes.exprparser.ExprParser.a(SourceFile:273)

at com.comsol.util.classes.exprparser.ExprParser.a(SourceFile:253)

at com.comsol.util.classes.exprparser.ExprParser.a(SourceFile:241)

at com.comsol.nativeutil.parser.ParseUtil.a(SourceFile:1095)

at com.comsol.nativeutil.parser.ParseUtil.a(SourceFile:1066)

at com.comsol.applapi.variables.am.replaceWithCompleteNames(SourceFile:3499)

at com.comsol.model.applapi.UnitConverter.getUnitExpr(SourceFile:647)

at com.comsol.core.parameter.ParamDatabase.a(SourceFile:967)

at com.comsol.core.parameter.ParamDatabase.set(SourceFile:907)

at com.comsol.core.parameter.ParamDatabase.a(SourceFile:867)

at com.comsol.model.dbmodel.ModelParamDb.addParametersToDatabase(SourceFile:235)

at com.comsol.model.method.ModelMethod.updateParamDatabase(SourceFile:3079)

at com.comsol.core.parameter.ParamDatabase.b(SourceFile:141)

at com.comsol.core.parameter.ParamDatabase.a(SourceFile:116)

at com.comsol.model.method.ParamBaseMethod.updateDependentParamDatabases(SourceFile:340)

at com.comsol.model.method.ModelParamMethod.updateDependentParamDatabases(SourceFile:172)

at com.comsol.model.dbmodel.ParamBaseDb.a(SourceFile:165)

at com.comsol.model.dbmodel.ModelEntityDb.handleEvent(SourceFile:958)

at com.comsol.model.data.EventManager.a(SourceFile:650)

at com.comsol.model.data.EventManager.sendEvent(SourceFile:633)

at com.comsol.model.data.EventManager.a(SourceFile:625)

at com.comsol.model.data.EventManager.a(SourceFile:487)

at com.comsol.model.data.MList.a(SourceFile:122)

at com.comsol.model.data.MList.set(SourceFile:432)

at com.comsol.model.dbmodel.ModelParamDb.a(SourceFile:121)

at com.comsol.model.dbmodel.ModelParamDb.b(SourceFile:1)

at com.comsol.model.dbmodel.ParamBaseDb.a(SourceFile:551)

at com.comsol.model.dbmodel.ParamBaseDb.set(SourceFile:515)

at jdk.internal.reflect.GeneratedMethodAccessor122.invoke(Unknown Source)

at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at com.comsol.bridge.command.c.a(SourceFile:147)

at com.comsol.bridge.command.c.run(SourceFile:90)

at com.comsol.bridge.command.l.c(SourceFile:213)

at com.comsol.bridge.command.l.a(SourceFile:203)

at com.comsol.bridge.command.l$1.run(SourceFile:94)

at com.comsol.util.thread.SuspendableTasks$1.run(SourceFile:111)

at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

at java.lang.Thread.run(Unknown Source)

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