Daily Script

Hi Brian,
We have a large daily script that we have been using for years for daily file load and consolidation. However, suddenly we are having issues and not everyday only every few days. For example last month, 16 of the 21 files loaded successfully. As far as we can tell nothing has changed. The errors we are receiving are regarding indexing of data. We seem to get a similar error but the error line changes speficially between 2 lines (2121 and 796). There was also 1 other error at line 878. I know it may be difficutlt to tell without seeing the script and supporting files, however, I would appreciate any assistance you can provide and would be welcome to any support you could provide, via zoom or anything else would be amazing!
Thanks Jill Downer!!