Finally I've got wordperfect 5.2a for OS/2 working on ArcaOS 5.1.1
The golden tip was from Andy Mills, where he described that the max. amount of RAM should be less than 512Mb for installing wordperfect for OS/2.
A temporary RAM-disk of 2600Mb was created.
So, I made copies from my config.sys, os2.ini and os2sys.ini. (Tip of Roderick to avoid that config.sys was "toasted").
Choose for custom install if you don't want it installed in de root directory of your bootdrive.
Installation finish with no error code but no folders or program objects are created.
As a result a popuplog.os2 was created:
01-08-2026 16:11:10 SYS3175 PID 005b TID 0001 Slot 008c
C:\TEMP\WPINST.DLL
c0000005
00010499
P1=00000000 P2=ffffffff P3=XXXXXXXX P4=XXXXXXXX
EAX=00001a17 EBX=00005aa6 ECX=0002c44f EDX=0000c416
ESI=0002ca94 EDI=0002ca42
DS=0017 DSACC=00f3 DSLIM=0000ebff
ES=0053 ESACC=d0f3 ESLIM=7fffffff
FS=150b FSACC=00f3 FSLIM=00000030
GS=0000 GSACC=**** GSLIM=********
CS:EIP=000f:00000499 CSACC=00fb CSLIM=0000d811
SS:ESP=0017:0000c3f0 SSACC=00f3 SSLIM=0000ebff
EBP=0002c40c FLG=00010246
WPINST.DLL 0001:00000499
I made the program object myself, ad the two created wordperfect directories to the libpath and path.
After removing the RAM-disk and reboot, wordperfect refuses to start, mowing that it couldn't find DDEML16.DLL, DDEML32.DLL and OS2SHCWP.DLL.
I was able to locate these DLL's and ad them to the wordperfect directories.
After that wordperfect starts and works.
Bit of nostalgia was recreated (snif).
Grts,
Adrian