Came across an issue with adding more than 256 resource items via RadASM's resource manager (Project Menu->Resource). The grid would show the extra items (bitmaps/icons/rcdata etc), but when saving to the actual resource file (.rc) it would cut off anything > 256 items. As the source code is on sourceforge and i had downloaded it, i figured it was a limit in RadASM itself, so was worth a look to see if i could spot anything.
Sure enough in the Resource.asm file there where two entries in the ResourceExport procedure and one in the ResourceProc procedure:
.while nInx<256
So i have changed this to 512 and tested adding resource items beyond the 256 boundary and they do save correctly to the .rc file now.
Ive updated the version no and attached the compiled exe file for anyone who may be using RadASM in case they run into this issue.