Error on Tomcat: groovy.lang.MissingPropertyException: No such property: sheetName for class: org.apache.poi.hssf.usermodel.HSSFSheet

[kddev1109]

While using the grails-excel-import plugin during run-app, the import of the file works perfectly.
After building a WAR and running the same on Tomcat, we are seeing the following error:

groovy.lang.MissingPropertyException: No such property: sheetName for class: org.apache.poi.hssf.usermodel.HSSFSheet
at org.codehaus.groovy.runtime.ScriptBytecodeAdapter.unwrap(ScriptBytecodeAdapter.java:50)
at org.codehaus.groovy.runtime.callsite.PojoMetaClassGetPropertySite.getProperty(PojoMetaClassGetPropertySite.java:35)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:227)
at org.grails.plugins.excelimport.ExcelImportService.convertColumnMapOneRow(ExcelImportService.groovy:168)
at org.grails.plugins.excelimport.ExcelImportService$convertColumnMapOneRow.callCurrent(Unknown Source)
at org.grails.plugins.excelimport.ExcelImportService.convertColumnMapManyRows(ExcelImportService.groovy:131)
at org.grails.plugins.excelimport.ExcelImportService$convertColumnMapManyRows.callCurrent(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:49)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
at org.grails.plugins.excelimport.ExcelImportService.convertColumnMapConfigManyRows(ExcelImportService.groovy:102)
at org.grails.plugins.excelimport.ExcelImportService$convertColumnMapConfigManyRows.callCurrent(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:49)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:133)
at org.grails.plugins.excelimport.ExcelImportService.columns(ExcelImportService.groovy:82)
at org.grails.plugins.excelimport.ExcelImportService.columns(ExcelImportService.groovy)
at org.grails.plugins.excelimport.ExcelImportService$columns.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120)
at com.example.package.SomeService.importStuff(SomeService.groovy:253)

This is being observed while calling ExcelImportService.columns as follows:

columnList = excelImportService.columns(workbook, columnConfig)

Any suggestions for this issue or any resolution would be highly appreciated.

Thanks,
KD