Skirting the main question slightly, but why did yo uexport as an excel file? Assuming you are using P6 8.1 or later, a straight convert to an MPP file would give a straight programme. I have found problems with conversions (MSP2007 especially did not like importing from P6, and P6 v8.3 seems to have a hatred of exporting to MSP07) but P6 8.2 and MSP2010 seem to get on well. This would circumvent the problem (hopefully) and give you the required end result.