Steps to Reproduce

1. import keikai-678.xlsx

Current Result

io.keikai.importer.ImportException: Fail to import cell A4 in sheet Sheet1 from book constArray.xlsx
at io.keikai.importer.XlsxImporter.imports(XlsxImporter.java:273)
at io.keikai.range.impl.imexp.ExcelImportAdapter.imports(ExcelImportAdapter.java:48)
at io.keikai.range.impl.imexp.AbstractImporter.imports(AbstractImporter.java:57)
at io.keikai.ui.Spreadsheet.getSBook(Spreadsheet.java:720)
at io.keikai.ui.Spreadsheet.getSelectedSSheet(Spreadsheet.java:900)
at io.keikai.ui.Spreadsheet.doInvalidate(Spreadsheet.java:2709)
at io.keikai.ui.Spreadsheet.invalidate(Spreadsheet.java:2566)
at io.keikai.ui.Spreadsheet.setSrc(Spreadsheet.java:949)

Expected Result

no error
display FALSE at A4

Debug Information

• keikai cannot accept a boolean value in an array like = {"A",#N/A,FALSE}

• no obvious reason that cannot accept a boolean value