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Finance | Project Operations, Human Resources, ...
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Regression suite automation Tool -Error message when validation a parameter file

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Hi. I'm trying to validate parameter files on RSAT, and keep getting the followinf message. Upgrading to an updated RSAT version didn't resolve the issue.  Anyone knows what this means?
 
System.InvalidOperationException: Errors: Error 11-13: Expected operator. We expect an operator such as +, *, or & at this point in the formula.
Error 13-14: Unexpected characters. Characters are used in the formula in an unexpected way.
Error 14-16: Expected operator. We expect an operator such as +, *, or & at this point in the formula.
Error 16-17: Unexpected characters. Characters are used in the formula in an unexpected way.
Error 17-19: Expected operator. We expect an operator such as +, *, or & at this point in the formula.
Error 19-19: Expected an operand. The formula or expression expects a valid operand. For example, you can add the operand '2' to the expression ' 1 +_' so that the result is '3'. Or, you can add the operand /there/ to the expression '/Hi /& _ ' so that the result is 'Hi there'.
   at Microsoft.PowerFx.CheckResult.ThrowOnErrors()
   at Microsoft.PowerFx.RecalcEngine.SetFormula(String name, FormulaWithParameters expr, Action`2 onUpdate)
   at Microsoft.Dynamics.TestValues.PowerFxEngineUtility.ProcessAndSetFormula(String name, String expression, String format, Boolean enableCustomExcelFormatting)
   at Microsoft.Dynamics.RegressionSuite.PowerFx.ValidateGeneratedXmlService.EvaluateWithEngine(String variableName, String variableValue, String format, Boolean enableCustomExcelFormatting, Boolean isFirstLoad)
   at Microsoft.Dynamics.RegressionSuite.PowerFx.ValidateGeneratedXmlService.RunTestSteps(String xmlPath)
   at Microsoft.Dynamics.RegressionSuite.CodeGeneratorHelper.ProcessXml(TestCaseModel testCase, String outputPath, String companyName, Boolean generateOnlyTestExecution, Boolean migrateUserParameters, Boolean isCreateDerivedAction)
   at Microsoft.Dynamics.RegressionSuite.WpfApp.Services.AttachmentGenerator.<>c__DisplayClass20_1.<<GenerateParentWithDerivedTests>b__1>d.MoveNext()
 
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