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Hi, I'm interested to follow this thread.  I am importing my data with csv file and am experiencing same error and/or crash.  I followed the same steps and exported a csv using 2 'fake' fill-ups created within Fuelio, then opened the csv in Excel and pasted my data over top.  However it still causes a crash and I can't identify why.  Are there limits on number of decimals, cell format, etc.?  

Great looking app and I look forward to using it.