AB> The error message is always SYS0182 referencing USER32->PMWINX.1022,

That means that you don't have the latest PMWINX.DLL.  Since PMWINX.DLL is
part of "Open32", that means in turn that you don't have the latest Open32.

Which means in turn that you haven't applied a recent OS/2 Warp 3 fixpack.

( I couldn't tell you the exact minimum OS/2 Warp 3 fixpack number for the
most recent Open32 updates.  Someone here who is still using OS/2 Warp 3 might 
be able to, though. )

 ¯ JdeBP ®

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