welcome to subsim.
glad you got things working.
you may want to check out the Large Address Aware (LAA) utility that many of the Subsim skippers use with great success. i am not familiar with the NTCore utility. here is the download link for LAA.
https://www.subsim.com/radioroom/dow...o=file&id=3634
for comparison purposes, there is my config for RFB:
Generic Mod Enabler - v2.6.0.157
[C:\Ubisoft\SH4_RFB\MODS]
1_RFB_2.0
2_RFB_2.0_Patch_23April2010
4_RFB_2.0_Patch_06June2019
3_SMMO for RFB 2.0
5_Stop The Shouting
6_OTC RFB 2.0
7_Increased binoculars for RFB OTC
8_RFB_LocNames - (adds more island labels to Nav map)
if you are running with a release of RFB that includes the April patch, then just pick up from there.
good luck...and good hunting.