Error found

Error checking function parameter 1 in call transform:transform(siid:intervencion(untyped-value-check[xs:string, $legis], untyped-value-check[xs:string, replace($coleccion, " ", "")], untyped-value-check[xs:string, $id], untyped-value-check[xs:string, $num]), doc(untyped-value-check[xs:string, $siid:XML_HIGHLIGHT_STYLE]), ): The actual return type does not match the sequence type declared in the function's signature: siid:intervencion(xs:string, xs:string, xs:string, xs:string) element(). Expected cardinality: exactly one, got 0.

XQuery Stack Trace
siid:intervencion(xs:string, xs:string, xs:string, xs:string)100:30
siid:display-page(xs:string, xs:string, xs:string, xs:string, xs:string, xs:string)162:21
Java Stack Trace:
Class NameMethod NameFile NameLine
org.exist.xquery.DynamicCardinalityCheckevalDynamicCardinalityCheck.java80
org.exist.xquery.DynamicTypeCheckevalDynamicTypeCheck.java61
org.exist.xquery.FunctionCallevalFunctionFunctionCall.java274
org.exist.xquery.FunctionCallevalFunctionCall.java201
org.exist.xquery.AbstractExpressionevalAbstractExpression.java61
org.exist.xquery.PathExprevalPathExpr.java242
org.exist.xquery.DynamicCardinalityCheckevalDynamicCardinalityCheck.java71
org.exist.xquery.BasicFunctionevalBasicFunction.java61
org.exist.xquery.InternalFunctionCallevalInternalFunctionCall.java55
org.exist.xquery.AbstractExpressionevalAbstractExpression.java61
org.exist.xquery.PathExprevalPathExpr.java242
org.exist.xquery.EnclosedExprevalEnclosedExpr.java70
org.exist.xquery.AbstractExpressionevalAbstractExpression.java61
org.exist.xquery.PathExprevalPathExpr.java242
org.exist.xquery.ElementConstructorevalElementConstructor.java271
org.exist.xquery.AbstractExpressionevalAbstractExpression.java61
org.exist.xquery.PathExprevalPathExpr.java242
org.exist.xquery.ElementConstructorevalElementConstructor.java271
org.exist.xquery.AbstractExpressionevalAbstractExpression.java61
org.exist.xquery.PathExprevalPathExpr.java242