qvd monitor application

[abc_18]

Hi Team,

I am trying to create a qvd monitor application, and have taken the reference from GIT hub library.

I am using this piece of code as suggested by  @Qlik-Peterman 

QvdTableHeader:

LOAD FilePath(FileName()) as Name, *;

LOAD QvBuildNo,

    CreateUtcTime,

    SourceFileSize,

    FileName()     as QVDFileName,

    '$(FolderName)'  as QVDFolder,

    TableName,

    RecordByteSize,

    NoOfRecords,

    Offset,

    Length

FROM '$(File)'(XmlSimple, Table is [QvdTableHeader]);

//=========== qvd source of meta ---xml header ========

LOAD FilePath(FileName()) as Name, *;

QvdFieldHeader:

LOAD FieldName,

    BitOffset,

    BitWidth,

    Bias,

    NoOfSymbols,

    Offset as HeaderOffset,

    Length as HeaderLength,

    [NumberFormat/Type] as Type,

    [NumberFormat/nDec] as nDec,

    [NumberFormat/UseThou] as UseThou,

    [NumberFormat/Fmt] as Fmt,

    [NumberFormat/Dec] as Dec

FROM '$(File)'(XmlSimple, Table is [QvdTableHeader/Fields/QvdFieldHeader]);

// ------------------------------------

// Get the number of columns manually

// ------------------------------------

LOAD

Name,

count(distinct FieldName ) as NoColumns

resident QvdFieldHeader

   group by Name;

Next File

End sub

// ---------------------------------------------------------

// Now call the control loop above with the folder variable

// ---------------------------------------------------------

FOR i = 0 to NoOfRows('QVDFolders')-1

LET FolderName = peek('QVDPath', i, 'QVDFolders');

Call DoDir('$(FolderName)')

NEXT 

let main_end=now();

QVDMetaHeader:

LOAD 

Name & '_' & '$(MetaTime)'    as %QVDKey,

Name      as QVDName,

Date('$(MetaTime)', 'YYYY-MM-DD hh:mm:ss')  as QVDMetaTime,

QVDFileName  as QVDFileName,

QVDFolder  as QVDFolder,

TableName      as QVDTableName,

NoOfRecords      as QVDNumRecs,

RecordByteSize    as QVDRecLen

Resident QvdTableHeader;

IF Exists(QvdFieldHeader-1) THEN

Set vTable = '[QvdFieldHeader-1]';

 ELSE

  Set vTable = '[QvdFieldHeader-4]';

END IF

 outer join

                LOAD DISTINCT 

                     Name as QVDName ,

                     NoColumns  as QVDNumCols

               // Resident [QvdFieldHeader-4];

                Resident $(vTable); 

However this last resident load is giving me an error, [QvdFieldHeader-4] table is not found.

Can someone please suggest where it's going wrong?

Regards