I'm Using Pi Toolbox 7.3 Under Windows 10. 

My Workbook with the Look up table channels is not working and every time I try to verify the look up table always says that invalid file name.

I already check the path, I changed the path to another folder to try it but any works.

All the look up tables are not working.

Could you please give me a hint?

Quote 0 0
I'm new here and just started playing myself, but noticed my computers excel version was labeling files as .xlsx and not .xls - I got the same error until I saved the spread sheets in a different version to get the .xls extension.

Hope this helps - maybe it's your issue as well

Quote 0 0