Better error messages when loading Experiment data

[MathurinD]

Hi,

I had several problems loading data into Newt and I think more helpful error messages or more lenient format specification would have made debugging faster.

• [ ] 1. 'Description' and 'Name' are not accepted as field names, only the version in small letters is.
• [ ] 2. Values have to integer be between -100 and 100 and I gave decimal values.
• [ ] 3. There seems to be a limit to the number of samples that can be displayed and the loader will not accept more columns in the experimental data file. It would be nice to have this number, and a proper error message to remind what this number is when too many columns are provided.

Thanks for the great software, I hope it keeps on getting better.

[ugurdogrusoz]

@MathurinD Thanks for reporting these issues, highly appreciated.

1. Let's convert the keywords to lowercase so any spelling is fine
2. Let's accept decimal values as well
3. I don't recall this limit? Let's discuss how we can relax this or at least report it and document it