Database import: no error check

[bsteubing]

I am importing a database through the Wizard (ecoinvent 3.5 cutoff) and the Console throws an error: bw2data.errors.InvalidExchange
The Database Import Wizard should catch such errors and tell the user that there was a problem (perhaps point to the debug window) and that the import was aborted.

[bsteubing]

actually in my case the reason was that I didn't have the latest default data installed (so this hint could also be given to the user)

[bsteubing]

Hi Adrian, I assigned you to this... don't know if you can still contribute or not, if not, please let me know. If yes, I think this should be an easy fix for you as you wrote that part of the code... I tried quickly, but it is complicated due to the threading... is there a way that the import wizard dialogue would not stay forever after an error occurs, but instead give an error message to the user and closes the import wizard?