Hello!
Loved using DEMIC, thanks for making the tool!
Only problem I had is at line 254 of the DEMIC.pl file:
if ($R_info[0] < 3 or $R_info[1] < 3.1 or !defined $R_info[2] or !defined $R_info[3]) {

Bolded statement means if using R version >4 (e.g. 4.2), I get a fatal error. DEMIC worked for me once I removed that section, but an and statement might be preferred:

if ($R_info[0] < 3 or ($R_info[0] < 4 and $R_info[1] < 3.1) or !defined $R_info[2] or !defined $R_info[3]) {

Thanks!