BGMS reports 'Error while executing the Write-To-File webject' in Windchill Enterprise Systems Integration

• BackgroundMethodServer (BGMS) reports Error while executing the Write-To-File webject

ERROR tasks.com.ptc.windchill.esi.export.ExportToFile  - Error while executing the Write-To-File webject. (com.infoengine.util.IEResource/9) com.infoengine.exception.fatal.IEInternalServiceException: Error trying to invoke webject: "Write-To-File".  Nested exception is: 
java.lang.NullPointerException
at com.infoengine.procunit.webject.WebjectProcessor.invokeWebject(WebjectProcessor.java:661)
at com.infoengine.procunit.webject.WebjectProcessor.processTask(WebjectProcessor.java:210)
...
Caused by: java.lang.NullPointerException
at net.sf.saxon.PreparedStylesheet.loadStylesheetModule(PreparedStylesheet.java:202)
at net.sf.saxon.PreparedStylesheet.prepare(PreparedStylesheet.java:162)
at net.sf.saxon.TransformerFactoryImpl.newTemplates(TransformerFactoryImpl.java:139)
...
ERROR com.ptc.windchill.esi.lite.util.XSLTransformer  - IOError for XSL to be applied. java.io.FileNotFoundException: codebase/customerName/esi/customerName.xsl (No such file or directory)
...
at com.ptc.windchill.esi.lite.util.XSLTransformer.applyXSL(XSLTransformer.java:252)
at com.ptc.windchill.esi.lite.util.XSLTransformer.applyXSL(XSLTransformer.java:348)
at com.ptc.windchill.esi.lite.tgt.webject.WriteToFile.applyXSL(WriteToFile.java:289)
at com.ptc.windchill.esi.lite.tgt.webject.WriteToFile.writeToFile(WriteToFile.java:192)
...
at com.infoengine.procunit.webject.WebjectProcessor.invokeWebject(WebjectProcessor.java:573)
at com.infoengine.procunit.webject.WebjectProcessor.processTask(WebjectProcessor.java:210)
at com.infoengine.SAK.Webject.invoke(Webject.java:491)
at com.infoengine.SAK.ExternalWebject.invoke(ExternalWebject.java:119)
at com.infoengine.compiledTasks.file.opt.ptc.Windchill_12$2e0.Windchill.tasks.com.ptc.windchill.esi.export.exporttofile$2exml.invoke(exporttofile$2exml.java:211)
at com.infoengine.SAK.Task.invoke(Task.java:1806)
at com.infoengine.SAK.Task.invoke(Task.java:1714)
at com.ptc.windchill.esi.txn.ESIResponseSender.run(ESIResponseSender.java:149)

• When reviewing transaction history for published objects from Enterprise Systems Transaction Administration, Status shows as Failed with error trying to invoke webject: "Write-To-File". Nested exception is: java.lang.NullPointerException popup