diff --git a/types/qlik-engineapi/index.d.ts b/types/qlik-engineapi/index.d.ts
index bf2355e88f..dd9d761f56 100644
--- a/types/qlik-engineapi/index.d.ts
+++ b/types/qlik-engineapi/index.d.ts
@@ -1,6 +1,7 @@
 // Type definitions for qlik-engineapi 12.67
 // Project: http://help.qlik.com/en-US/sense-developer/November2017/Subsystems/EngineAPI/Content/introducing-engine-API.htm
 // Definitions by: Konrad Mattheis <https://github.com/konne>
+//                 Richard Ison <https://github.com/richardison>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 declare namespace EngineAPI {
@@ -344,14 +345,14 @@ declare namespace EngineAPI {
          * This parameter is optional; it is only used for OLEDB, ODBC and CUSTOM connections.
          * A call to GetConnection method does not return the user name.
          */
-        qUserName: string;
+        qUserName?: string;
 
         /**
          * Password of the user who creates the connection.
          * This parameter is optional; it is only used for OLEDB, ODBC and CUSTOM connections.
          * A call to GetConnection method does not return the password.
          */
-        qPassword: string;
+        qPassword?: string;
 
         /**
          * Is generated by the engine.
@@ -449,13 +450,13 @@ declare namespace EngineAPI {
          * Comment related to the variable.
          * >> This parameter is optional.
          */
-        qComment: string;
+        qComment?: string;
 
         /**
          * Defines the format of the value.
          * >> This parameter is optional.
          */
-        qNumberPresentation: IFieldAttributes;
+        qNumberPresentation?: IFieldAttributes;
 
         /**
          * Set this property to true to update the variable when applying a bookmark.
@@ -565,14 +566,14 @@ declare namespace EngineAPI {
          *    2: for ignore; the reload of the script continues even if an error is detected in the script.
          * >> This parameter is optional.
          */
-        qMode: number;
+        qMode?: number;
 
         /**
          * Set to true for partial reload
          * >> This parameter is optional.
          * >> The default value is false.
          */
-        qPartial: boolean;
+        qPartial?: boolean;
 
         /**
          * Set to true if debug breakpoints are to be honored.
@@ -580,7 +581,7 @@ declare namespace EngineAPI {
          * >> This parameter is optional.
          * >> The default value is false.
          */
-        qDebug: boolean;
+        qDebug?: boolean;
     }
 
     /**
@@ -606,20 +607,20 @@ declare namespace EngineAPI {
          * Text related to the field value
          * This parameter is optional.
          */
-        qText: string;
+        qText?: string;
 
         /**
          * Is set to true if the value is a numeric.
          * This parameter is optional. Default is false.
          */
-        qIsNumeric: boolean;
+        qIsNumeric?: boolean;
 
         /**
          * Numeric value of the field.
          * This parameter is displayed if qIsNumeric is set to true.
          * This parameter is optional.
          */
-        qNumber: number;
+        qNumber?: number;
     }
 
     /**
@@ -3255,7 +3256,7 @@ declare namespace EngineAPI {
          * @param qRelativePath - Path of the connection file. This parameter is optional.
          * @returns - return a Promise of FileDataFormat
          */
-        guessFileType(qConnectionId: string, qRelativePath: string): Promise<IFileDataFormat>;
+        guessFileType(qConnectionId: string, qRelativePath?: string): Promise<IFileDataFormat>;
 
         /**
          * Locks all selections in all fields of the current app.
@@ -3266,7 +3267,7 @@ declare namespace EngineAPI {
          * The default value is an empty string.
          * @returns - A promise of a Qlik engine reply.
          */
-        lockAll(qStateName: string): Promise<void>;
+        lockAll(qStateName?: string): Promise<void>;
 
         /**
          * migrateDerivedFields.
@@ -3530,7 +3531,7 @@ declare namespace EngineAPI {
          * The default value is an empty string.
          * @returns - A promise true or false
          */
-        unlockAll(qStateName: string): Promise<void>;
+        unlockAll(qStateName?: string): Promise<void>;
     }
 
     interface INxFieldProperties {
@@ -3851,7 +3852,7 @@ declare namespace EngineAPI {
          * Everything that matches the text is selected.
          * >> This parameter is optional.
          */
-        qTextSearch: string;
+        qTextSearch?: string;
 
         /**
          * Lower value of the search range.
@@ -4304,7 +4305,7 @@ declare namespace EngineAPI {
          * Text related to the attribute expression value.
          * This property is optional. No text is returned if the attribute expression value is a numeric.
          */
-        qText: string;
+        qText?: string;
 
         /**
          * Numeric value of the attribute expression.
@@ -4322,13 +4323,13 @@ declare namespace EngineAPI {
          * Some text.
          * This parameter is optional.
          */
-        qText: string;
+        qText?: string;
 
         /**
          * A value.
          * This parameter is optional.
          */
-        qNum: number;
+        qNum?: number;
 
         /**
          * Rank number of the value, starting from 0.
@@ -4363,14 +4364,14 @@ declare namespace EngineAPI {
          * Is set to true, if qText and qNum are empty.
          * This parameter is optional. The default value is false.
          */
-        qIsEmpty: boolean;
+        qIsEmpty?: boolean;
 
         /**
          * Is set to true if a total is displayed in the cell.
          * This parameter is optional. The default value is false.
          * Not applicable to list objects.
          */
-        qIsTotalCell: boolean;
+        qIsTotalCell?: boolean;
 
         /**
          * Is set to true if the cell belongs to the group Others.
@@ -4378,20 +4379,20 @@ declare namespace EngineAPI {
          * This parameter is optional. The default value is false.
          * Not applicable to list objects.
          */
-        qIsOtherCell: boolean;
+        qIsOtherCell?: boolean;
 
         /**
          * Frequency of the value.
          * This parameter is optional.
          */
-        qFrequency: string;
+        qFrequency?: string;
 
         /**
          * Search hits.
          * The search hits are highlighted.
          * This parameter is optional.
          */
-        qHighlightRanges: INxHighlightRanges;
+        qHighlightRanges?: INxHighlightRanges;
 
         /**
          * Attribute expression values.
@@ -4453,14 +4454,14 @@ declare namespace EngineAPI {
          * This number depends on the paging, more particularly it depends on the values defined in qTop and qHeight
          * This parameter is optional. Is not shown if the value is 0.
          */
-        qUp: number;
+        qUp?: number;
 
         /**
          * Number of elements that are part of the next tail.
          * This number depends on the paging, more particularly it depends on the values defined in qTop and qHeight
          * This parameter is optional. Is not shown if the value is 0.
          */
-        qDown: number;
+        qDown?: number;
     }
 
     /**
@@ -4555,7 +4556,7 @@ declare namespace EngineAPI {
          * Text related to the attribute expression value.
          * This property is optional. No text is returned if the attribute expression value is a numeric.
          */
-        qText: string;
+        qText?: string;
 
         /**
          * Element number.
@@ -4805,7 +4806,7 @@ declare namespace EngineAPI {
          * This parameter is optional.
          * Gives information on the error.
          */
-        qError: INxLayoutErrors;
+        qError?: INxLayoutErrors;
 
         /**
          * Information about the selections.
@@ -5620,7 +5621,7 @@ declare namespace EngineAPI {
          * Dimension numbers/indexes start from 0.
          * This parameter is optional. If this parameter is not set, the selected values in all dimensions are locked.
          */
-        lock(qPath: string, qColIndices: number[]): Promise<void>;
+        lock(qPath: string, qColIndices?: number[]): Promise<void>;
 
         /**
          * Publishes a generic object.
@@ -5916,7 +5917,7 @@ declare namespace EngineAPI {
          * Dimension numbers/indexes start from 0.
          * This parameter is optional. If this parameter is not set, the locked values in all dimensions are unlocked.
          */
-        unlock(qPath: string, qColIndices: number[]): Promise<void>;
+        unlock(qPath: string, qColIndices?: number[]): Promise<void>;
 
         /**
          * Unpublishes a generic object.
@@ -5975,7 +5976,7 @@ declare namespace EngineAPI {
          * This parameter is optional.
          * Default value is no grouping.
          */
-        qGrouping: NxGrpType;
+        qGrouping?: NxGrpType;
 
         /**
          * Array of expressions.
@@ -6658,14 +6659,14 @@ declare namespace EngineAPI {
          * This parameter is optional. Default is false.
          * Is set to true if the version of ODBC is 32-bit.
          */
-        qBit32: boolean;
+        qBit32?: boolean;
 
         /**
          * This parameter is optional. Default is false.
          * Is set to true if the connection is User DSN.
          * The connection works only for a specific user.
          */
-        qUserOnly: boolean;
+        qUserOnly?: boolean;
     }
 
     /**
@@ -6686,7 +6687,7 @@ declare namespace EngineAPI {
          * This parameter is optional. Default is false.
          * Is set to true if the version of the OLEDB provider is 32-bit.
          */
-        qBit32: boolean;
+        qBit32?: boolean;
     }
 
     /**
@@ -6989,7 +6990,7 @@ declare namespace EngineAPI {
          * >> This parameter is optional.
          * >> The default value is Main.
          */
-        createApp(qAppName: string, qLocalizedScriptMainSection: string): Promise<any>; // ?Result
+        createApp(qAppName: string, qLocalizedScriptMainSection?: string): Promise<any>; // ?Result
 
         /**
          * Creates an app and opens an engine session.
@@ -7183,7 +7184,7 @@ declare namespace EngineAPI {
          * If set to true, the GetCustomConnectors method looks for new connectors in the file system.
          * @returns A Promise Array of CustomConnector
          */
-        getCustomConnectors(qReloadList: boolean): Promise<ICustomConnector[]>;
+        getCustomConnectors(qReloadList?: boolean): Promise<ICustomConnector[]>;
 
         /**
          * Lists the databases in a ODBC, OLEDB or CUSTOM data source.
@@ -7519,7 +7520,7 @@ declare namespace EngineAPI {
          * Number of values in optional state.
          * Integer
          */
-        qOption: number;
+        qOption?: number;
 
         /**
          * Number of values in deselected state.
@@ -7590,7 +7591,7 @@ declare namespace EngineAPI {
          *       # A for sorting ascending
          *       # D for sorting descending
          */
-        qSortIndicator: SortIndicatorType;
+        qSortIndicator?: SortIndicatorType;
 
         /**
          * Array of dimension labels.
@@ -7624,7 +7625,7 @@ declare namespace EngineAPI {
          * Gives information on the error.
          * Null or NxValidationError
          */
-        qError: INxValidationError;
+        qError?: INxValidationError;
 
         /**
          * Binary format of the field.
@@ -7661,7 +7662,7 @@ declare namespace EngineAPI {
          * This parameter is optional.
          * FieldAttributes
          */
-        qNumFormat: FieldAttributesType;
+        qNumFormat?: FieldAttributesType;
 
         /**
          * This parameter is set to true if qNumFormat is set to U (unknown). The engine guesses the type of the field based on the field's definition.
@@ -7771,14 +7772,14 @@ declare namespace EngineAPI {
          * This parameter is optional.
          * String
          */
-        qContext: string;
+        qContext?: string;
 
         /**
          * Internal information from the server.
          * This parameter is optional.
          * String
          */
-        qExtendedMessage: string;
+        qExtendedMessage?: string;
     }
 
     /**
@@ -7806,13 +7807,13 @@ declare namespace EngineAPI {
         /**
          * Sort indicator. This parameter is optional. The default value is no sorting.
          */
-        qSortIndicator: SortIndicatorType;
+        qSortIndicator?: SortIndicatorType;
 
         /**
          * Format of the field. This parameter is optional.
          * One of: N for no sorting, A for sorting ascending, D for sorting descending
          */
-        qNumFormat: IFieldAttributes;
+        qNumFormat?: IFieldAttributes;
 
         /**
          * This parameter is set to true if qNumFormat is set to U (unknown). The engine guesses the type of the field based on the field's expression.
@@ -7832,7 +7833,7 @@ declare namespace EngineAPI {
         /**
          * This parameter is optional. Gives information on the error.
          */
-        qError: INxValidationError;
+        qError?: INxValidationError;
 
         /**
          * If set to true, it inverts the sort criteria in the field.
@@ -8323,7 +8324,7 @@ declare namespace EngineAPI {
          * Default value is no grouping.
          * >> This parameter is optional.
          */
-        qGrouping: NxGrpType;
+        qGrouping?: NxGrpType;
 
         /**
          * Definition of the expression in the measure.
@@ -8414,7 +8415,7 @@ declare namespace EngineAPI {
          * Label of the cell.
          * >> This parameter is optional.
          */
-        qLabel: string;
+        qLabel?: string;
 
         /**
          * Some text related to the cell.
@@ -8521,7 +8522,7 @@ declare namespace EngineAPI {
         /**
          * This parameter is optional and is displayed in case of error.
          */
-        qError: INxValidationError;
+        qError?: INxValidationError;
 
         /**
          * Information about the dimension.
@@ -8553,7 +8554,7 @@ declare namespace EngineAPI {
          * Gives information on the error.
          * >> This parameter is optional.
          */
-        qError: INxLayoutErrors;
+        qError?: INxLayoutErrors;
     }
 
     /**
@@ -8628,7 +8629,7 @@ declare namespace EngineAPI {
          * >> This parameter is optional.
          * >> Default is NX_FREQUENCY_NONE.
          */
-        qFrequencyMode: FrequencyModeType;
+        qFrequencyMode?: FrequencyModeType;
 
         /*
          * If set to true, alternative values are allowed in qData.
@@ -8636,7 +8637,7 @@ declare namespace EngineAPI {
          * If set to false, no alternative values are displayed in qData. Values are excluded instead.
          * Note that on the contrary, the qStateCounts parameter counts the excluded values as alternative values.
          */
-        qShowAlternatives: boolean;
+        qShowAlternatives?: boolean;
 
         /*
          * Fetches an initial data set.
@@ -8700,7 +8701,7 @@ declare namespace EngineAPI {
         /**
          * This parameter is optional and is displayed in case of error.
          */
-        qError: INxValidationError;
+        qError?: INxValidationError;
 
         /**
          * Information on the dimension.
@@ -8787,14 +8788,14 @@ declare namespace EngineAPI {
          * If set to true, the formatting of the results is slightly different.
          * >> This property is optional.
          */
-        qIndentMode: boolean;
+        qIndentMode?: boolean;
 
         /**
          * Is used for pivot tables only.
          * Position of the last expended cell.
          * >> This property is optional.
          */
-        qLastExpandedPos: INxCellPosition;
+        qLastExpandedPos?: INxCellPosition;
 
         /**
          * ...
@@ -8941,7 +8942,7 @@ declare namespace EngineAPI {
          * As long as the condition is not met, the engine does not perform a new calculation.
          * This property is optional. By default, there is no calculation condition.
          */
-        qCalcCond: IValueExpr;
+        qCalcCond?: IValueExpr;
 
         /**
          * To enable the sorting by ascending or descending order in the values of a measure.
@@ -9002,13 +9003,13 @@ declare namespace EngineAPI {
          * Optional parameter. This parameter is displayed if its value is true.
          * Is set to true if the field is a numeric.
          */
-        qIsNum: boolean;
+        qIsNum?: boolean;
 
         /**
          * Optional parameter. This parameter is displayed if its value is true.
          * Is set to true if the field is locked.
          */
-        qLocked: boolean;
+        qLocked?: boolean;
 
         /**
          * Information about the fields that are not selected.
@@ -9019,7 +9020,7 @@ declare namespace EngineAPI {
          * Optional parameter. This parameter is displayed if its value is true.
          * Property that is set to a field. Is set to true if the field cannot be unselected.
          */
-        qOneAndOnlyOne: boolean;
+        qOneAndOnlyOne?: boolean;
 
         /**
          * Information about the range of selected values.
@@ -9068,7 +9069,7 @@ declare namespace EngineAPI {
          * Text that was used for the search.
          * This parameter is filled when searching for a value and selecting it.
          */
-        qTextSearch: string;
+        qTextSearch?: string;
 
         /**
          * Number of values in the field.