Arjit,
I have the similiar issue, If I have the data in my sporeadhseet I can able to vlookup the data projected on my chart. If I have the data bringing from Query Browser & with the same vlookup setup its not loading my chart.
All my cells in the spreadsheet shows as #N/A & while loading dashboard chart shows empty even there is data.
Any suggestions would really appreciated.
Thanks,
Rakesh