Yes, you're using 3.8 so that"s fine. In another thread on here that you're currently participating in someone suggested there was something wrong with your graphics card driver setup. I wonder if this could be a reason here too? I can't help further as I don't know anything about RTG setups.
Yes - to find out why my system crashes upon starting NetSurf, I re-Installed OS 3.9 and the BoingBags I & II.
As for this I had booted from the OS 3.9 CD using the Emergency Disk, it had copied the Voodoo monitor driver file from the Emergency Disk.
The OS 3.9 CD does not know about Mediators and Voodoo graphics card, so the Voodoo driver could only have come from the Emergency Disk.
Therefor I was asked to insert the Emergency Disk each time I booted, which was quite annoying.
After copying the my old Voodoo monitor file over from a backup, I was no longer asked for the floppy disk anymore.
But with regard to my problems starting Mapparium - what about e.g. MUI?
My copy of IBrowse (which I`m just using for this posting) has a menue item "About Mui", where it says:
Library version 19.35,
Mui Release Version: 3.8,
Compilation Date: 12.,02.[19]97 .
Furthermore it says:
Custom Class Version Date Copyright
Busy.mcc 17.37 23.7.97 1994- 1997 kmel, Klaus Melchior
IBTextEditField.ibcc 24.1 22.12.2006 2001-2006 Stefan Burstroem
Listtree.mcc 17.36 30.1.97 1995- 1997 kmel, Klaus Melchior
Newstring.mcc 16.18 27.12.2005 1995- 1996 RĂ¼diger Sopp fixes by MM
NList.mcc 20.138 [OS3/m68k] (05.04.2014) Copyright (C) 2001-2014 NList Open Source Team
NListview.mcc 19.93 [OS3/m68k] (05.04.2014) Copyright (C) 2001-2014 NList Open Source Team
Aboutmui.mui 19.8 12.02.97 1992- 1997 Stefan Stunz
Floattext.mui 19.8 12.02.97 1992- 1997 Stefan Stunz
Gauge.mui 19.8 12.02.97 1992- 1997 Stefan Stunz
Popasl.mui 19.8 12.02.97 1992- 1997 Stefan Stunz
Scrollgroup.mui 19.8 12.02.97 1992- 1997 Stefan Stunz
Virtgroup.mui 19.10 12.02.97 1992- 1997 Stefan Stunz
As I can remember having updated some mui classes at some point(s) in time, the reason for Mapparium not starting could also be one of the non-original MUI-files.
But which files are original, and which not?
Could a fresh install of the original MUI v3.8 possibly solve the problem?