[grrrshadow]

hey guys, i've created an omniplan project. when i finished it,and wanna show it to my colleague in windows, i've found it cant export my project to XML, below is the error info:
net.sf.mpxj.MPXJException: Error reading file (failed at line 3)
at net.sf.mpxj.mpx.MPXReader.read(MPXReader.java:179)
at net.sf.mpxj.reader.AbstractProjectReader.read(Abst ractProjectReader.java:47)
at mpxjconverter.convertFile(mpxjconverter.java:53)
at mpxjconverter.main(mpxjconverter.java:42)
Caused by: net.sf.mpxj.MPXJException: Failed to parse rate
at net.sf.mpxj.mpx.Record.getRate(Record.java:366)
at net.sf.mpxj.mpx.MPXReader.populateDefaultSettings( MPXReader.java:490)
at net.sf.mpxj.mpx.MPXReader.parseRecord(MPXReader.ja va:227)
at net.sf.mpxj.mpx.MPXReader.read(MPXReader.java:154)
... 3 more
Caused by: java.text.ParseException: Unparseable number: "(null)"
at java.text.NumberFormat.parse(NumberFormat.java:333 )
at net.sf.mpxj.mpx.Record.getRate(Record.java:357)
... 6 more

what's the meaning of it, and how to solve this problem, pls help me, it's improtant...