}
// If ref param is omitted, the information specified in the info_type argument
// is returned for the last cell that was changed
} else if (!type.equals("filename"))// no ref was passed in and option is not "filename"
// We cannot determine which is the "last cell" they are referencing;
throw new FunctionNotSupportedException("Worsheet function CELL with no reference parameter is not supported");
else // filename option can use any biffrec ...
cell= operands[0].getParentRec();
// at this point both ref (PtgRef) and r (BiffRec) should be valid
try {