Trying to convert pdf to xlsx format

The pdf I am trying to convert is a 1000 page document. The samples I received in the zip did not include a node script to export to xlsx. So I repurposed the 'export-pdf-to-docx.js' file to instead convert to xlsx by changing the following parameters within it:

1. exportPdfOperation = exportPDF.Operation.createNew(exportPDF.SupportedTargetFormats.DOCX); => exportPdfOperation = exportPDF.Operation.createNew(exportPDF.SupportedTargetFormats.XLSX);

2. const input = PDFToolsSdk.FileRef.createFromLocalFile('resources/exportPDFInput.pdf'); =>

const input = PDFToolsSdk.FileRef.createFromLocalFile('C:/NEW ABSOLUTE INPUT FILE LOCATION.pdf');

3. exportPdfOperation.execute(executionContext)
.then(result => result.saveAsFile('output/exportPdfOutput.docx')) =>

exportPdfOperation.execute(executionContext)
.then(result => result.saveAsFile('C:/NEW ABSOLUTE OUTPUT FILE LOCATION.xlsx'))

When I first tested with a 5 page pdf file, it worked just fine. However when I tried again with the 1000 page pdf, I am getting the following error. Please help clarify the issue and how to address this.

2021-01-21T16:29:39.682:[INFO]: All validations successfully done. Beginning PDF export
Exception encountered while executing operation ServiceApiError: An unknown error has occurred.
at C:\Abode PDF Tools SDK\adobe-dc-pdf-tools-sdk-node-samples\node_modules\@adobe\documentservices-pdftools-node-sdk\src\internal\api\cpf-api.js:170:20
at IncomingForm.<anonymous> (C:\Abode PDF Tools SDK\adobe-dc-pdf-tools-sdk-node-samples\node_modules\formidable\lib\incoming_form.js:107:9)
at IncomingForm.emit (events.js:315:20)
at IncomingForm._maybeEnd (C:\Abode PDF Tools SDK\adobe-dc-pdf-tools-sdk-node-samples\node_modules\formidable\lib\incoming_form.js:557:8)
at JSONParser.parser.onEnd (C:\Abode PDF Tools SDK\adobe-dc-pdf-tools-sdk-node-samples\node_modules\formidable\lib\incoming_form.js:532:10)
at JSONParser.end (C:\Abode PDF Tools SDK\adobe-dc-pdf-tools-sdk-node-samples\node_modules\formidable\lib\json_parser.js:29:8)
at IncomingMessage.<anonymous> (C:\Abode PDF Tools SDK\adobe-dc-pdf-tools-sdk-node-samples\node_modules\formidable\lib\incoming_form.js:132:30)
at IncomingMessage.emit (events.js:327:22)
at endReadableNT (internal/streams/readable.js:1327:12)
at processTicksAndRejections (internal/process/task_queues.js:80:21) {
requestTrackingId: 'Ds6CU7fhzXr9LRn8cmG8eFraTiPw0SuP',
statusCode: 500
}