ISOFieldPackager[] fld = new ISOFieldPackager[6];
fld[0] = new IFA_LLLLCHAR(100, "testCTCSubFieldPackagerDescription");
cTCSubFieldPackager.setFieldPackager(fld);
byte[] b = new byte[4];
try {
cTCSubFieldPackager.unpack(new ISOField(), b);
fail("Expected ISOException to be thrown");
} catch (ISOException ex) {
assertEquals("ex.getMessage()", "org.jpos.iso.IFA_LLLLCHAR: Problem unpacking field 0", ex.getMessage());
assertNull("ex.getNested().getMessage()", ex.getNested().getMessage());
}