Hello,

I am using Stata 16.1 and encountered the following error message when running even simple regressions like xtreg in panel data, using 11 variables and around 6350 observations.

_coef_table(): 3499 member _b_stat::set_dfmat() not found

Panel data are specified as such. I found several suggestions on how to solve this like issue such as
https://www.statalist.org/forums/for...essage-in-13-1
https://www.stata.com/statalist/arch.../msg00205.html

but none of the suggestions regarding updating (update all, force) solved the problem since all my updates are up to date:

Update status
Last check for updates: 22 Jul 2020
New update available: none (as of 22 Jul 2020)
Current update level: 30 Jun 2020 (what's new)

Possible actions

Do nothing; all files are up to date.

I tried to wait as suggested by one fellow in the forum until my proxy server may flush all ado-files and executives, reinstalling Stata, using less variables..nothing helps.
Any suggestions on how to solve this issue?
Thanks a lot in advance!