Erro ao gerar uma planilha

Programação Java
#1

Pessoal,

Estou utilizando JExcel para gerar uma planilha

WritableWorkbook gerarArquivo = Workbook.createWorkbook(new FileOutputStream(caminho),Workbook.getWorkbook(streamArquivo)); gerarArquivo.write(); gerarArquivo.close();

Antigamente ele gerava um arquivo xls sem nenhum problema.

Agora ele gera esta menssagem:

Warning: External sheet record for Biff 7 not supported Warning: External sheet record for Biff 7 not supported Warning: External sheet record for Biff 7 not supported Warning: External sheet record for Biff 7 not supported Warning: Usage of a local non-builtin name Warning: Usage of a local non-builtin name Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 name records - ignoring Warning: Cannot copy Biff7 print settings record - ignoring Warning: Standard property set Workbook not present in source file

Alguém pode me dar alguma dica do que esta acotecendo.

#2