GT> Can anybody tell me why Borland C/C++ v3.1
 GT> is freaking and spewing about ibmcache.com under
 GT> Warp 4 ?
Do you actually have a program called IBMCACHE.COM on your machine ?  No such 
program comes as part of OS/2 Warp 4, and I suspect that you will find that 
you are accidentally invoking a program that came with PC-DOS or perhaps a 
third party cacheing program whenever you try to invoke Borland C++.  Are you 
invoking Borland C++ using a batch script, by any chance ?
A tip that may help:  It is a bad idea to include C:\DOS in the PATH set by 
the AUTOEXEC.BAT used for OS/2 Virtual DOS Machines.
 ¯ JdeBP ®
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