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Cannot install IBM OS2 Warp 3.0 (Bluebox Edition) (3.5), it have internal error 03
Internal error 03 often occurs if the hardware has more than 64 MB of RAM or larger than 4 GB IDE drive. There was a set of replacement install disks that permitted use of larger hard disks over at WarpDoctor.
Otherwise, you will have to describe the system used for the install. It is a trifle challenging to figure out issues without information.
Warp connect is 3.1 version, according to tcmdos2.exe In any case, the difference between OS/2 Warp and OS/2 Warp Connect are similar to Windows 3.1 and Windows for Workgroups 3.11
OS/2 Italian uploaded
https://vetusware.com/download/OS2 Warp 3 3.0 IT/?id=15183