hi Otto,
i have download TGRID-main.zip and compile / link Source and got working EXE
just use GO.BAT (BCC 32 Bit) or GO64.BAT (MSVC 64 Bit)
! Note : you have to DELETE all Resource in DUALGRID.RC which are only DUMMY as i don´t provide Icon/Bitmap
for BCC i use *.MAK which have these Path
HBDIR=c:\harbour
BCDIR=c:\BCC7
FWDIR=c:\fwh
for MSVC i use *.HBP and Folder
c:\harbour64
c:\FWH64
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your Error-log begin with Line 4823 but all LOCAL are define in line 4807
it look like your Download is corrupt. please try download again
i would NEVER release a Sample which so much Error ...